Relevant bibliographies by topics / Contralateral and ipsilateral projections

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Contralateral and ipsilateral projections'

Author: Grafiati
Published: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Contralateral and ipsilateral projections.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Contralateral and ipsilateral projections"

1

HOSHINO, NORIAKI, KAZUYA TSURUDOME, HIDEKI NAKAGAWA, and NOBUYOSHI MATSUMOTO. "Current source density analysis of contra- and ipsilateral isthmotectal connections of the frog." Visual Neuroscience 23, no. 5 (September 2006): 713–19. http://dx.doi.org/10.1017/s0952523806230037.

Full text
Abstract:
The nucleus isthmi (NI) of the frog receives input from the ipsilateral optic tectum and projects back to both optic tecta. After ablation of NI, frogs display no visually elicited prey-catching or threat avoidance behavior. Neural mechanisms that underlie the loss of such important behavior have not been solved. Electrophysiological examination of the contralateral isthmotectal projection has proved that it contributes to binocular vision. On the other hand, there are very few physiological investigations of the ipsilateral isthmotectal projection. In this study, current source density (CSD) analysis was applied to contra- and ipsilateral isthmotectal projections. The contralateral projection produced monosynaptic sinks in superficial layers and in layer 8. The results confirmed former findings obtained by single unit recordings. The ipsilateral projection elicited a prominent monosynaptic sink in layer 8. Recipient neurons were located in layers 6–7. These results, combined with those from the former intracellular study, led to the following neuronal circuit. Afferents from the ipsilateral NI inhibit non-efferent pear shaped neurons in the superficial layers, and strongly excite large ganglionic neurons projecting to the descending motor regions. Thus feedback to the output neurons strengthens the visually elicited responses.
APA, Harvard, Vancouver, ISO, and other styles
2

Rosengren, Sally M., Konrad P. Weber, Sendhil Govender, Miriam S. Welgampola, Danielle L. Dennis, and James G. Colebatch. "Sound-evoked vestibular projections to the splenius capitis in humans: comparison with the sternocleidomastoid muscle." Journal of Applied Physiology 126, no. 6 (June 1, 2019): 1619–29. http://dx.doi.org/10.1152/japplphysiol.00711.2018.

Full text
Abstract:
The short-latency vestibulo-collic reflex in humans is well defined for only the sternocleidomastoid (SCM) neck muscle. However, other neck muscles also receive input from the balance organs and participate in neck stabilization. We therefore investigated the sound-evoked vestibular projection to the splenius capitis (SC) muscles by comparing surface and single motor unit responses in the SC and SCM muscles in 10 normal volunteers. We also recorded surface responses in patients with unilateral vestibular loss but preserved hearing and hearing loss but preserved vestibular function. The single motor unit responses were predominantly inhibitory, and the strongest responses were recorded in the contralateral SC and ipsilateral SCM. In both cases there was a significant decrease or gap in single motor unit activity, in SC at 11.7 ms for 46/66 units and in SCM at 12.7 ms for 51/58 motor units. There were fewer significant responses in the ipsilateral SC and contralateral SCM muscles, and they consisted primarily of weak increases in activity. Surface responses recorded over the contralateral SC were positive-negative during neck rotation, similar to the ipsilateral cervical vestibular evoked myogenic potential in SCM. Responses in SC were present in the patients with hearing loss and absent in the patient with vestibular loss, confirming their vestibular origin. The results describe a pattern of inhibition consistent with the synergistic relationship between these muscles for axial head rotation, with the crossed vestibular projection to the contralateral SC being weaker than the ipsilateral projection to the SCM. NEW & NOTEWORTHY We used acoustic vestibular stimulation to investigate the saccular projections to the splenius capitis (SC) and sternocleidomastoid (SCM) muscles in humans. Single motor unit recordings from within the muscles demonstrated strong inhibitory projections to the contralateral SC and ipsilateral SCM muscles and weak excitatory projections to the opposite muscle pair. This synergistic pattern of activation is consistent with a role for the reflex in axial rotation of the head.
APA, Harvard, Vancouver, ISO, and other styles
3

Ueta, Yoshifumi, Jaerin Sohn, Fransiscus Adrian Agahari, Sanghun Im, Yasuharu Hirai, Mariko Miyata, and Yasuo Kawaguchi. "Ipsi- and contralateral corticocortical projection-dependent subcircuits in layer 2 of the rat frontal cortex." Journal of Neurophysiology 122, no. 4 (October 1, 2019): 1461–72. http://dx.doi.org/10.1152/jn.00333.2019.

Full text
Abstract:
In the neocortex, both layer 2/3 and layer 5 contain corticocortical pyramidal cells projecting to other cortices. We previously found that among L5 pyramidal cells of the secondary motor cortex (M2), not only intratelencephalic projection cells but also pyramidal tract cells innervate ipsilateral cortices and that the two subtypes are different in corticocortical projection diversity and axonal laminar distributions. Layer 2/3 houses intratelencephalically projecting pyramidal cells that also innervate multiple ipsilateral and contralateral cortices. However, it remained unclear whether layer 2/3 pyramidal cells can be divided into projection subtypes each with distinct innervation to specific targets. In the present study we show that layer 2 pyramidal cells are organized into subcircuits on the basis of corticocortical projection targets. Layer 2 corticocortical cells of the same projection subtype were monosynaptically connected. Between the contralaterally and ipsilaterally projecting corticocortical cells, the monosynaptic connection was more common from the former to the latter. We also found that ipsilaterally and contralaterally projecting corticocortical cell subtypes differed in their morphological and physiological characteristics. Our results suggest that layer 2 transfers separate outputs from M2 to individual cortices and that its subcircuits are hierarchically organized to form the discrete corticocortical outputs. NEW & NOTEWORTHY Pyramidal cell subtypes and their dependent subcircuits are well characterized in cortical layer 5, but much less is understood for layer 2/3. We demonstrate that in layer 2 of the rat secondary motor cortex, ipsilaterally and contralaterally projecting corticocortical cells are largely segregated. These layer 2 cell subtypes differ in dendrite morphological and intrinsic electrophysiological properties, and form subtype-dependent connections. Our results suggest that layer 2 pyramidal cells form distinct subcircuits to provide discrete corticocortical outputs.
APA, Harvard, Vancouver, ISO, and other styles
4

Harman, AM, DP Crewther, JE Nelson, and SG Crewther. "Retinal Projections in the Northern Native Cat, Dasyurus-Hallucatus (Marsupialia, Dasyuridae)." Australian Journal of Zoology 35, no. 2 (1987): 115. http://dx.doi.org/10.1071/zo9870115.

Full text
Abstract:
The retinal projections of the northern native cat, Dasyurus hallucatus, were studied by the anterograde transport of tritiated proline and by autoradiography. Seven regions in the brain were found to receive direct retinal projections: (1) the suprachiasmatic nucleus; (2) the dorsal lateral geniculate nucleus; (3) the ventral lateral geniculate nucleus; (4) the lateral posterior nucleus; (5) the nuclei of the accessory optic tract; (6) the pretectal nuclei; (7) the superior colliculus. All nuclei studied received a bilateral retinal projection except the medial terminal nucleus of the accessory optic system, in which only a contralateral input was found. The contralateral eye had a greater input in all cases. As with the related species, Dasyurus viverrinus, there is extensive binocular overlap in the dorsal lateral geniculate nucleus (LGNd). In the LGNd contralateral to the injected eye, the autoradiographs show four contralateral terminal bands occupying most of the nucleus. The axonal terminations in the ipsilateral LGNd are more diffuse but show a faint lamination pattern of four bands. The ventral portion of the LGNd receives only contralateral retinal input, and therefore probably represents the monocular visual field. The other principal termination of the optic nerve, the superior colliculus, has a predominantly contralateral input to both sublayers of the stratum griseum superficiale. However, the ipsilateral fibres terminate only in patches in the more inferior sublayer.
APA, Harvard, Vancouver, ISO, and other styles
5

Chapman, Angela M., and Elizabeth A. Debski. "Neuropeptide Y immunoreactivity of a projection from the lateral thalamic nucleus to the optic tectum of the leopard frog." Visual Neuroscience 12, no. 1 (January 1995): 1–9. http://dx.doi.org/10.1017/s0952523800007264.

Full text
Abstract:
AbstractUsing rhodamine-labelled latex beads as a retrograde tracer, we have shown that a subset of the neurons projecting from the lateral thalamic nucleus to the optic tectum of the leopard frog are neuropeptide Y-like immunoreactive (NPY-IR). In juvenile frogs, approximately twice as many lateral thalamic nucleus cells from this area project to the ipsilateral tectum as project to the contralateral tectum. NPY-IR cells make up 25% of the projection to the ipsilateral tectum and 13% of the projection to the contralateral tectum. The ipsilateral NPY-IR projection from the lateral nucleus was present in tadpoles and was similar in its characteristics to that found in the juvenile frog. However, the contralateral tectal projection was virtually nonexistent in these animals. The results of these experiments suggest that NPY from the lateral nucleus is released into the ipsilateral tectal neuropil in both the developing and adult frog.
APA, Harvard, Vancouver, ISO, and other styles
6

Klug, A., T. J. Park, and G. D. Pollak. "Glycine and GABA influence binaural processing in the inferior colliculus of the mustache bat." Journal of Neurophysiology 74, no. 4 (October 1, 1995): 1701–13. http://dx.doi.org/10.1152/jn.1995.74.4.1701.

Full text
Abstract:
1. The mammalian inferior colliculus contains large populations of binaural cells that are excited by stimulation of the contralateral ear and are inhibited by stimulation of the ipsilateral ear, and are called excitatory/inhibitory (EI) cells. Neurons with EI properties are initially created in the lateral superior olive (LSO), which, in turn, sends strong bilateral projections to the inferior colliculus. The questions that we address in this report are 1) whether the inhibition evoked by stimulation of the ipsilateral ear occurs at the inferior colliculus or whether it occurs in a lower nucleus, presumably the LSO; and 2) if the ipsilaterally evoked inhibition occurs at the inferior colliculus, is the inhibition a consequence of glycinergic innervation or is it a consequence of GABAergic innervation. To study these questions, we recorded from 61 EI neurons in the inferior colliculus of the mustache bat before and during the iontophoretic application of the glycine receptor antagonist, strychnine. We also tested the effects of the gamma-aminobutyric acid-A (GABAA) receptor antagonist, bicuculline, on 38 of the 61 neurons that were tested with strychnine. The main finding is that glycinergic or GABAergic inhibition, or both, contribute to the ipsilaterally evoked inhibition in approximately 50% of the EI neurons in the inferior colliculus. 2. Strychnine and bicuculline had different effects on the magnitude of the spike counts evoked by stimulation of the contralateral (excitatory) ear. On average, strychnine caused the maximum spike count evoked by contralateral stimulation to increase by only 23%. The relatively small effects of strychnine on response magnitude are in marked contrast to the effects of bicuculline, which usually caused much larger increases in spike counts. For example, although strychnine caused spike counts to more than double in approximately 25% of the collicular neurons, bicuculline caused a doubling of the spike count in approximately 60% of the cells. 3. The inhibitory influences of ipsilateral stimulation were evaluated by driving the neurons with a fixed intensity at the contralateral ear and then documenting the reductions in spike counts due to the presentation of progressively higher intensities at the ipsilateral ear. In 64% of the neurons sampled, blocking glycinergic inhibition with strychnine had little or no effect on the ipsilaterally evoked inhibition. These cells remained as strongly inhibited during the application of strychnine as they did before its application. In addition, the ipsilateral intensity that produced complete or nearly complete spike suppression in the predrug condition was also unchanged by strychnine. 4. In 36% of the neurons, strychnine markedly reduced the degree of ipsilaterally evoked spike suppression. In five of these neurons, there was a complete elimination of the ipsilateral inhibition: these neurons were transformed from strongly inhibited EI neurons into monaural neurons. 5. The influence of both strychnine and bicuculline was tested sequentially in 38 neurons. In about one-half of these cells, (53%, 20/38) the ipsilaterally evoked inhibition was unaffected by either drug. In 10 other units (26%), both drugs substantially reduced or eliminated the ipsilaterally evoked inhibition. In most of these cells, both bicuculline and strychnine reduced the ipsilaterally evoked inhibition to a similar degree. In the remaining eight cells studied with both drugs (21%), the ipsilaterally evoked inhibition was reduced or eliminated by one of the drugs, but not by both. 6. These results show that both glycinergic and GABAergic projections influence the ipsilaterally evoked inhibition in about one-half of the EI neurons in the inferior colliculus. The glycinergic inhibition elicited by ipsilateral stimulation is most likely due to projections from the ipsilateral lateral superior olive, whereas the GABAergic inhibition evoked by ipsilateral stimulation is most likely caused b
APA, Harvard, Vancouver, ISO, and other styles
7

Vigouroux, Robin J., Karine Duroure, Juliette Vougny, Shahad Albadri, Peter Kozulin, Eloisa Herrera, Kim Nguyen-Ba-Charvet, et al. "Bilateral visual projections exist in non-teleost bony fish and predate the emergence of tetrapods." Science 372, no. 6538 (April 8, 2021): 150–56. http://dx.doi.org/10.1126/science.abe7790.

Full text
Abstract:
In most vertebrates, camera-style eyes contain retinal ganglion cell neurons that project to visual centers on both sides of the brain. However, in fish, ganglion cells were thought to innervate only the contralateral side, suggesting that bilateral visual projections appeared in tetrapods. Here we show that bilateral visual projections exist in non-teleost fishes and that the appearance of ipsilateral projections does not correlate with terrestrial transition or predatory behavior. We also report that the developmental program that specifies visual system laterality differs between fishes and mammals, as the Zic2 transcription factor, which specifies ipsilateral retinal ganglion cells in tetrapods, appears to be absent from fish ganglion cells. However, overexpression of human ZIC2 induces ipsilateral visual projections in zebrafish. Therefore, the existence of bilateral visual projections likely preceded the emergence of binocular vision in tetrapods.
APA, Harvard, Vancouver, ISO, and other styles
8

Naeem, Nazratan, James Bowman Whitley, Arkadiusz S. Slusarczyk, and Martha Elise Bickford. "Ultrastructure of ipsilateral and contralateral tectopulvinar projections in the mouse." Journal of Comparative Neurology 530, no. 7 (October 24, 2021): 1099–111. http://dx.doi.org/10.1002/cne.25264.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Berlot, Eva, George Prichard, Jill O’Reilly, Naveed Ejaz, and Jörn Diedrichsen. "Ipsilateral finger representations in the sensorimotor cortex are driven by active movement processes, not passive sensory input." Journal of Neurophysiology 121, no. 2 (February 1, 2019): 418–26. http://dx.doi.org/10.1152/jn.00439.2018.

Full text
Abstract:
Hand and finger movements are mostly controlled through crossed corticospinal projections from the contralateral hemisphere. During unimanual movements, activity in the contralateral hemisphere is increased while the ipsilateral hemisphere is suppressed below resting baseline. Despite this suppression, unimanual movements can be decoded from ipsilateral activity alone. This indicates that ipsilateral activity patterns represent parameters of ongoing movement, but the origin and functional relevance of these representations is unclear. In this study, we asked whether ipsilateral representations are caused by active movement or whether they are driven by sensory input. Participants alternated between performing single finger presses and having fingers passively stimulated while we recorded brain activity using high-field (7T) functional imaging. We contrasted active and passive finger representations in sensorimotor areas of ipsilateral and contralateral hemispheres. Finger representations in the contralateral hemisphere were equally strong under passive and active conditions, highlighting the importance of sensory information in feedback control. In contrast, ipsilateral finger representations in the sensorimotor cortex were stronger during active presses. Furthermore, the spatial distribution of finger representations differed between hemispheres: the contralateral hemisphere showed the strongest finger representations in Brodmann areas 3a and 3b, whereas the ipsilateral hemisphere exhibited stronger representations in premotor and parietal areas. Altogether, our results suggest that finger representations in the two hemispheres have different origins: contralateral representations are driven by both active movement and sensory stimulation, whereas ipsilateral representations are mainly engaged during active movement. NEW & NOTEWORTHY Movements of the human body are mostly controlled by contralateral cortical regions. The function of ipsilateral activity during movements remains elusive. Using high-field neuroimaging, we investigated how human contralateral and ipsilateral hemispheres represent active and passive finger presses. We found that representations in contralateral sensorimotor cortex are equally strong during both conditions. Ipsilateral representations were mostly present during active movement, suggesting that sensorimotor areas do not receive direct sensory input from the ipsilateral hand.
APA, Harvard, Vancouver, ISO, and other styles
10

Rahman, Tasnia N., Martin Munz, Elena Kutsarova, Olesia M. Bilash, and Edward S. Ruthazer. "Stentian structural plasticity in the developing visual system." Proceedings of the National Academy of Sciences 117, no. 20 (May 4, 2020): 10636–38. http://dx.doi.org/10.1073/pnas.2001107117.

Full text
Abstract:
In a small fraction of Xenopus tadpoles, a single retinal ganglion cell (RGC) axon misprojects to the ipsilateral optic tectum. Presenting flashes of light to the ipsilateral eye causes that ipsilateral axon to fire, whereas stimulating the contralateral eye excites all other RGC inputs to the tectum. We performed time-lapse imaging of individual ipsilaterally projecting axons while stimulating either the ipsilateral or contralateral eye. Stimulating either eye alone reduced axon elaboration by increasing branch loss. New branch additions in the ipsi axon were exclusively increased by contralateral eye stimulation, which was enhanced by expressing tetanus neurotoxin (TeNT) in the ipsilateral axon, to prevent Hebbian stabilization. Together, our results reveal the existence of a non−cell-autonomous “Stentian” signal, engaged by activation of neighboring RGCs, that promotes exploratory axon branching in response to noncorrelated firing.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Contralateral and ipsilateral projections"

1

Liu, Sam Chi-Hao. "An investigation of potential interactions between Ten-m3 and EphA7 in the formation of binocular visual circuits." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/27416.

Full text
Abstract:
Because the precise alignment between contralateral and ipsilateral visual circuits is important for the development of visual system, both circuits need to be precisely regulated concurrently. Eph-ephrin and Teneurin are two protein families that may have important roles in regulating the development of the visual pathway (Kania & Klein, 2016; Leamey & Sawatari, 2014). However, while the roles of Eph-ephrin in the development of contralateral projection have been widely studied (Kania & Klein, 2016), the numbers of studies that have focused on ipsilateral projection is relatively low. On the other hand, while the roles of teneurins in ipsilateral projection have been reported, their roles in the formation of contralateral projections are less well-known. Glendining et al (2017) recently showed that there is a potential interaction between Ten-m3 and EphA7 as the expression of EphA7 was reduced in Teneurin transmembrane protein 3 (Ten-m3) KO (Glendining et al., 2017). This thesis will investigate the roles of Ten-m3 and EphA7 in regulating the development of ipsilateral and contralateral projections during the formation of topographic map in visual system respectively. The results point to complementary roles for Ten-m3 and EphA7 in regulating the development of ipsilateral projections in the visual system. However, similar topographic errors were found in the patterning of contralateral projections in the visual system in Ten-m3 KO and EphA7 KO. This suggest that Ten-m3 and EphA7 may have different roles during the development of ipsilateral and contralateral projections. Behavioural studies revealed a potential deficit in the ability of EphA7 KO mice to discriminate between visual stimuli located in their dorsal visual field, suggesting the functional importance of EphA7 in visual behaviors.
APA, Harvard, Vancouver, ISO, and other styles
2

Taylor, John-Paul. "Ipsilateral corticospinal projections in man." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341447.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lilaonitkul, Watjana 1975. "Frequency specificity of the ipsilateral, contralateral and binaural medical efferent reflexes in humans." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/87179.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
Includes bibliographical references (leaves 41-45).
by Watjana Lilaonitkul.
S.M.
APA, Harvard, Vancouver, ISO, and other styles
4

Lilaonitkul, Watjana 1975. "Frequency specificity of contralateral, ipsilateral and bilateral medial olivocochlear acoustic reflexes in humans." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43060.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
Includes bibliographical references.
A variety of evidence indicates that the brain controls the gain of mechanical amplification in the cochlea in a frequency specific manner through the medial olivocochlear (MOC) efferent pathway, but the degree of MOC frequency specificity in humans is poorly understood. This thesis investigates the tuning properties of the human MOC acoustic reflex at different cochlear frequency regions and with different MOC-elicitor lateralities and frequency contents. Effects produced by the MOC reflex were quantified by the magnitude of the induced changes in stimulus frequency otoacoustic emissions (deltaSFOAEs) at probe frequencies of 0.5, 1 and 4 kHz. With MOC activity elicited by a mid-level (60 dB SPL) tone or half-octave-band of noise, significant MOC-induced deltaSFOAEs were seen over a wide range of elicitor frequencies, e.g. for elicitor frequencies at least 11/2 octaves away from each probe frequency. deltaSFOAE-versus-elicitor-frequency patterns were sometimes skewed so that elicitors at frequencies above (0.5 kHz probe) or below (1 kHz probe) the probe frequency were most effective. In contrast to the wide frequency range of MOC effects from mid-level elicitors, for 1 kHz probes MOC-effect tuning curves (TCs) were narrow with Ql0s of -2, sharper than the MOC-fiber TCs with best frequencies near I kHz in cats and guinea pigs. When MOC effects were looked at as the MOC-inhibited SFOAE relative to the original SFOAE, the SFOAE magnitude decreases and phase changes appeared to be separate functions of elicitor frequency: SFOAE magnitude inhibition was largest for on-frequency elicitors (elicitor frequencies near the probe frequency) while MOC-induced SFOAE phase leads were largest for off-frequency elicitors.
(cont) One hypothesis to account for this is that on-frequency elicitors predominantly inhibit the traveling wave from the probe-tone, whereas off-frequency elicitors shift it along the frequency axis by selectively inhibiting apical or basal parts of the traveling-wave. These results are consistent with an anti-masking role of MOC efferents and suggest that MOC efferents do more than just provide feedback to a narrow frequency region around the elicitor frequency.
by Watjana Lilaonitkul.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
5

Häner, Martin [Verfasser]. "Anterior cruciate ligament revision surgery : ipsilateral quadriceps versus contralateral semitendinosus-gracilis autografts / Martin Häner." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2018. http://d-nb.info/1153768798/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Carnero, Salazar Sylvia. "Transferencia embrionaria ipsilateral y contralateral a la posición del cuerpo lúteo y sobrevivencia embrionaria en llamas." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2007. https://hdl.handle.net/20.500.12672/718.

Full text
Abstract:
El presente trabajo se realizó con el propósito de evaluar el efecto de la transferencia embrionaria ipsilateral y contralateral a la posición del cuerpo lúteo sobre la tasa de preñez en llamas. Se utilizaron 43 llamas hembras receptoras de 4 a 6 años, distribuidas aleatoriamente en 4 grupos de estudio: G1 (n=10): Cuerpo lúteo en ovario derecho y transferencia ipsilateral, G2 (n=10): Cuerpo lúteo en ovario derecho y transferencia contralateral, G3 (n=15): Cuerpo lúteo en ovario izquierdo y transferencia ipsilateral y G4 (n=8): Cuerpo lúteo en ovario izquierdo y transferencia contralateral. Se utilizaron 10 llamas hembras como donadoras de embriones, las cuales fueron sincronizadas con LH (1ml), superovuladas con 1000 UI de eCG y se provocó luteólisis con prostaglandina (1ml), siendo empadradas posteriormente. El día del empadre las llamas receptoras recibieron tratamiento con LH, con el propósito de sincronizarlas con las donadoras. Siete días post empadre se realizó el lavado uterino para la recolección, evaluación y transferencia de los embriones. La transferencia embrionaria a los grupos experimentales se realizó con embriones frescos el mismo día. Los resultados obtenidos señalan una tasa de preñez de 60% (G1) y 75% (G3) en las hembras con transferencia embrionaria ipsilateral derecha e izquierda respectivamente, mientras que en la transferencia contralateral derecha e izquierda fueron 30% (G2) y 25%(G4) respectivamente. Sin embargo, no se registraron diferencias significativas (p>0.05) entre el grupo G1 con los grupos G2, G3 y G4, además G2 no muestra diferencias significativas (p>0.05) con G4. Mientras que se encontró diferencia (p menor 0.05) entre el grupo G3 con los grupos G2 y G4. Estos resultados indicarían una mayor tasa de sobrevivencia embrionaria en llamas al realizar la transferencia en el cuerno ipsilateral a la posición del cuerpo lúteo ubicado en el ovario izquierdo.
The study was carried out with the objective of to evaluate the embryo survival after the embryo transfer to the uterine horn ipsilateral and contralateral to the corpus luteum (CL) in llamas. Fourtythree llamas recipient females, from 4 to 6 years old were randomly assigned in 4 groups: G1 (n=10): CL in right ovary and ipsilateral embryo transfer, G2 (n=10): CL in right ovary and contralateral transfer, G3 (n=15): CL in left ovary and ipsilateral transfer, and G4 (n=8): CL in left ovary and contralateral transfer. Ten llamas were used as embryo donors, they were synchronized with LH (1ml), then superovulated with 1000 UI eCG and induced to luteolysis with PGF2α; after that, all of them were mated. The same day of mating, the recipients were treated with LH, with the purpose of synchronization with donors. Seven days postmating, the uterine horns were flushed to recover, evaluate and transfer the embryos. The nonsurgical embryo transfer was used the same day with fresh embryos. The results of pregnancy rate were 60% (G1) and 75% (G3) in recipient females with ipsilateral embryo transfer right and left respectively. On the other hand, contralateral embryo transfer right and left were 30% (G2) and 25% (G4) respectively. However, the differences did not reach significance (p>0.05) between G1 with G2, G3 and G4. Furthermore, G2 not differ (p>0.05) from G4. Whereas, there is difference (p less 0.05) between G3 with G2 and G4. These results indicate that pregnancy rate is major in llamas when the embryo transfer was to the uterine horn ipsilateral to the CL in the left ovary.
Tesis
APA, Harvard, Vancouver, ISO, and other styles
7

Garcia, René. "Etude quantitative du codage de l'information visuelle dans le système rétino-tectal ipsilatéral de Rana esculenta (Amphibien Anoure) comparaison avec la projection contralatérale directe /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37613795r.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Dolberg, Rebecca. "Task specific focal hand dystonia: Temporal and spatial abnormalities in sensory and motor processing in the contralateral and ipsilateral hemispheres." Diss., Search in ProQuest Dissertations & Theses. UC Only, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3390042.

Full text
Abstract:
Thesis (D.P.T.Sc.)--University of California, San Francisco and San Francisco State University, 2009.
Source: Dissertation Abstracts International, Volume: 71-02, Section: B, page: . Adviser: Nancy N. Byl.
APA, Harvard, Vancouver, ISO, and other styles
9

Balakrishnan, Anuranjani. "Effects of Voluntary Physical Rehabilitation on Neurogenesis In SVZ And Functional Recovery After Ischemic Stroke." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1537186443944433.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Lima, Nubia Maria Freire Vieira 1981. "Avaliação e intervenção sensorial para a extremidade superior contralateral e hipotermia da extremidade ipsilateral ao acidente vascular cerebral = Assessment and sensorial training of contralesional upper-extremity and ipsilesional hypothermia in stroke patients." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/312573.

Full text
Abstract:
Orientador: Donizeti Cesar Honorato
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
Made available in DSpace on 2018-08-24T10:38:27Z (GMT). No. of bitstreams: 1 Lima_NubiaMariaFreireVieira_D.pdf: 2259312 bytes, checksum: 39bc49e5fb60f586b16aa8bfa15bd3cc (MD5) Previous issue date: 2014
Resumo: Mais da metade das vítimas de Acidente Vascular Cerebral (AVC) apresentará algum grau de incapacidade, especialmente na extremidade superior (ES), e esta pode ser agravada pelos déficits sensoriais protopáticos e/ou epicríticos. Astereognosia, déficits das sensações táteis, dolorosas, térmicas e proprioceptivas são frequentes e podem afetar ambas as ES, resultando em prejuízos no alcance/preensão e dependência da orientação visual (OV). A redução do input sensorial da ES ipsilateral ao AVC é realizada para avaliar as conexões interhemisféricas e os efeitos na função sensório-motora das ES¿s. A crioterapia pode reduzir a velocidade de condução nervosa e minimizar o input sensorial da ES ipsilateral ao AVC. O objetivo do artigo 1 foi descrever o desempenho sensório-motor da ES de paciente pós-AVC crônico, na presença e ausência de OV. A ES foi avaliada pelo Protocolo de Desempenho Físico de Fugl-Meyer (FM), Avaliação Sensorial de Nottingham (ASN), 10 testes funcionais (TF) e testes de sequência motora (SM). A paciente apresentou déficits táteis, proprioceptivos e astereognosia na ES contralateral ao AVC e, a despeito do leve comprometimento motor, demonstrou lentidão/incapacidade de realização dos TF e SM na ausência da OV, caracterizando a paresia aferente. O objetivo do artigo 2 foi investigar as alterações sensoriais no complexo punho-mão ipsilateral de 28 sujeitos pós-AVC crônico e correlacioná-las com as disfunções sensório-motoras contralaterais à lesão, testes funcionais (com e sem OV), lateralidade do AVC e dominância manual. Foram aplicados a estesiometria, ASN, subescalas sensorial e motora de FM e testes funcionais. Os resultados revelaram distúrbios sensoriais ipsilaterais protopáticos e epicríticos em 64% dos indivíduos. Aqueles com lesão em hemisfério cerebral direito mostraram melhor sensação tátil na ES ipsilateral ao AVC e houve perda sensorial significativa na ES ipsilateral em dois sujeitos canhotos. Não houve correlação entre os déficits sensoriais das ES nem correlação entre os déficits sensoriais ipsilaterais e o comprometimento motor contralateral ao AVC. Os objetivos do artigo 3 foram aplicar a hipotermia por imersão da ES ipsilateral ao AVC (punho-mão) associada à intervenção sensorial (IS) na ES contralateral ao AVC crônico e avaliar os efeitos imediatos e em longo prazo. Foram acompanhados 27 sujeitos pós-AVC crônico nos grupos 1 (n=14) e 2 (n=13). O grupo 2 foi submetido à hipotermia por imersão do punho e mão ipsilaterais ao AVC com IS e o grupo 1 realizou IS (10 sessões). Foram mensurados estesiometria, FM, ASN, TF, SM, discriminação tátil, de peso, nível de desconforto e parâmetros hemodinâmicos. Os efeitos imediatos foram estabilidade hemodinâmica durante e após a hipotermia, ausência de alterações sensoriais na ES contralateral ao AVC, hipoestesia na ES ipsilateral (dermátomos C6 e C8) (p<0,05) e níveis de desconforto aceitáveis. Em longo prazo, tem-se a melhora nos TF (com e sem OV) e localização tátil, propriocepção consciente e função tátil nos dermátomos C6 e C7 na mão contralateral ao AVC do grupo 2 (p<0,05). O uso da hipotermia de imersão da ES ipsilateral associado à intervenção sensorial na ES contralateral ao AVC conduziu à melhora sensório-motora da ES oposta ao AVC crônico
Abstract: More than half the stroke victims will present some degree of disability, especially in the upper extremity (UE), and this may be influenced by somatosensory deficits. Astereognosis, deficits of tactile, painful, thermal and proprioceptive disturbances are frequent and can affect both ES, resulting in losses in the reach/grasp and dependence on visual guidance (VG). The reduction of ipsilesional UE¿s sensory input is performed to evaluate the interhemispherics connections and effects on sensorimotor function in stroke subjects. Cryotherapy can reduce the conduction velocity of sensory fibres and can minimise sensory input to the ipsilesional UE. The purpose of Article 1 was to describe the UE¿s sensorimotor performance in chronic post-stroke subject, in the presence and absence of VG. The contralesional UE was assessed by the Fugl-Meyer Assessment (FMA), Nottingham Sensory Assessment (NSA), 10 functional tests (FT) and motor sequence (MS). Despite the mild motor impairment, the patient presented tactile, proprioceptive dysfunctions and astereognosis in contralesional UE and slowness/failure to achieve FT and MS test in the absence of VG, characterizing the afferent paresis. The Article 2 investigated the changes in the ipsilesional wrist and hand of 28 stroke chronic stroke subjects and correlate them with the sensory-motor dysfunction contralateral to the lesion, functional tests (with and without VG), stroke laterality and hand dominance. The subjects were evaluated by esthesiometry, ASN, sensory and motor subscales FMA and FT. The results showed sensory disorders in 64% of individuals. Those with lesions in the right cerebral hemisphere showed better tactile sensation in the ipsilesional UE and significant sensory loss was found in the ipsilesional UE in two left-handed subjects. There was no correlation between sensory deficits of UE¿s or correlation between ipsilesional sensory deficits and contralesional motor impairment. The Article 3 applied immersion hypothermia of an ipsilesional upper extremity (UE) and sensorial intervention of contralesional UE of chronic post-stroke patients to evaluate the immediate hemodynamic, sensorimotor and long-term effects. The sample included 27 stroke patients allocated into group 1 (n=14), which received conventional physiotherapy for the contralesional UE, and group 2 (n=13), which was submitted to immersion hypothermia of the ipsilesional wrist and hand in ten sessions. Assessments were performed pre- and post-treatment and at follow-up using esthesiometry, FMA, NSA, FT, tactile and weight discrimination, MS, level of comfort and hemodynamic parameters. The immediate effects of immersion hypothermia were hemodynamic stability during and after each session, an absence of sensory changes in the UE and hypoesthesia in dermatomes, C6 and C8, of the ipsilesional UE (p<0.05), which maintained acceptable levels of comfort. Significant long-term improvements in test scores with and without visual guidance, using tactile localization, conscious proprioception and in tactile function of the C6 and C7 dermatomes of the contralesional hand in group 2 (p<0.05). Immersion hypothermia of the ipsilesional UE in chronic stroke patients is a safe, inexpensive and practical, with good patient adherence to the technique. The use of immersion hypothermia on the ipsilesional UE improved motor and sensitivity functions in the contralesional UE of chronic stroke patients
Doutorado
Ciencias Biomedicas
Doutora em Ciências Médicas
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Contralateral and ipsilateral projections"

1

Kaplan, Tamara, and Tracey Milligan. Cerebrovascular Disease 3: Brainstem Syndromes (DRAFT). Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190650261.003.0006.

Full text
Abstract:
The video in this chapter explores cerebrovascular disease, and focuses on brainstem syndromes. It includes the hallmark ‘crossed signs’ feature of brainstem syndromes (ipsilateral cranial nerve deficits, contralateral long track signs), the characteristics of lateral medullary syndrome due to a PICA stroke, and palsies that may result from a ventral pontine stroke, and medical midbrain stroke.
APA, Harvard, Vancouver, ISO, and other styles
2

Kaplan, Tamara, and Tracey Milligan. Spinal Cord Syndromes (DRAFT). Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190650261.003.0021.

Full text
Abstract:
The video in this chapter discusses spinal cord syndromes, including Brown Sequard syndrome (presenting with ipsilateral loss of vibration/proprioception, spastic weakness, flaccid weakenss, and contralateral loss of pain and temperature), central cord syndrome (presenting with loss of pain and temperature in a cape-like distribution), and vitamin B12 deficiency (may present as subacute combined degeneration).
APA, Harvard, Vancouver, ISO, and other styles
3

Kahn, S. Lowell. Use of a Buddy Wire to Facilitate Contralateral Gate Catheterization During Endovascular Aortic Aneurysm Repair. Edited by S. Lowell Kahn, Bulent Arslan, and Abdulrahman Masrani. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199986071.003.0005.

Full text
Abstract:
Catheterization of the contralateral gate during endovascular aortic aneurysm repair is typically of little difficulty. However, on occasion it proves challenging. With the exception of grafts such as Nellix (Endologix Inc., Irvine, CA), which utilizes parallel stents with polymer endobags, and those that employ a unibody concept, such as the AFX (Endologix Inc., Irvine, CA), all modular grafts require this step. A difficult catheterization can often be facilitated by using different catheters, such as the Cobra, Van Schie (Cook Medical Inc., Bloomington, IN), or Sos (AngioDynamics Inc., Latham, NY) designs. Alternatively, a wire advanced up and over through the contralateral gate from the ipsilateral side can be snared allowing catheterization of the gate. This chapter describes a simple alternative buddy wire technique that facilitates rapid contralateral gate catheterization.
APA, Harvard, Vancouver, ISO, and other styles
4

Bates, David. Brainstem syndromes. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199204854.003.02409_update_001.

Full text
Abstract:
Case History—A 78 yr old woman presenting with brainstem signs following a seizure.Brainstem syndromes typically cause ipsilateral cranial nerve lesions and contralateral long tract signs. They are commonly due to brainstem ischaemia, but can also be caused by neoplasia, demyelination, infective and hamartomatous lesions. Imaging, ideally with MRI rather than CT, is obligatory and only then—and possibly following other investigations to identify systemic abnormality or cerebrospinal fluid changes—can appropriate therapy be introduced....
APA, Harvard, Vancouver, ISO, and other styles
5

Kahn, S. Lowell. Flip Techniques: Obtaining Antegrade and Retrograde Femoral Access Through a Single Access Site. Edited by S. Lowell Kahn, Bulent Arslan, and Abdulrahman Masrani. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199986071.003.0024.

Full text
Abstract:
Retrograde access of the common femoral artery for ipsilateral iliac and up-and-over contralateral iliac-to-tibial interventions has been the standard of care for lower extremity procedures. However, ipsilateral antegrade access has gained popularity for infrainguinal occlusive disease. Proximity of the access site to the point of occlusion confers a higher technical success rate. Interestingly, there are times where conversion of a single femoral access from retrograde to antegrade or antegrade to retrograde may be desired. Three techniques are reviewed in this chapter: the first technique involves using a reverse curve catheter in conjunction with a Glidewire. The second technique is a “rebound” method whereby a Fogarty catheter is inflated just beyond the tip of a retrograde sheath to deflect a side-by-side Glidewire in the opposite direction. The third technique describes converting an antegrade sheath back to retrograde using a “buddy wire.”
APA, Harvard, Vancouver, ISO, and other styles
6

Schreuder, Michiel F. Duplex, ectopic, and horseshoe kidneys. Edited by Adrian Woolf. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199592548.003.0352.

Full text
Abstract:
A duplex urinary tract, irrespective of the degree of duplication, is present in 0.8% at autopsy, of which about 20–35% is bilateral. The majority of duplex systems are incomplete, indicating that the ipsilateral ureters fuse before entering the bladder. A complete duplex system shows anomalies of the upper moiety, with associated ureterocele or ectopic ureter, and of the lower moiety, frequently associated with vesicoureteral reflux. Renal ectopia is a rare (1/1000) congenital defect where the kidney is not located in the renal fossa, and is associated with a high rate of hydronephrosis, vesicoureteral reflux, and abnormal contralateral kidney. In a horseshoe kidney (present in 1/400 to 1/1800), fusion of the two kidneys takes place, but the two renal moieties are still located on both sides of the midline. As the lower poles are fused in the midline, a horseshoe kidney is usually located lower than normal and orientation of the renal axis is shifted, which may guide diagnosis during abdominal ultrasound.
APA, Harvard, Vancouver, ISO, and other styles
7

Sprigings, David. Coma. Edited by Patrick Davey and David Sprigings. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199568741.003.0040.

Full text
Abstract:
Coma is a pathological state of unconsciousness from which a patient cannot be roused to wakefulness by stimuli, and reflects dysfunction of the brainstem reticular system and its thalamic projections (the neuronal basis of wakefulness), or diffuse injury of both cerebral hemispheres. A unilateral lesion of a cerebral hemisphere (e.g. haemorrhagic stroke) will not cause coma unless there is secondary compression of the contralateral hemisphere or brainstem. Coma is a medical emergency, because a comatose patient is at high risk of permanent brain injury or death, caused either by the underlying disorder or the secondary effects of coma. Stabilization of the airway, breathing, and circulation, and exclusion of hypoglycaemia are the first priorities, before diagnosis is explored further. Clinical assessment together with neuroimaging will usually identify the likely cause or causes. The clinical approach to diagnosis and management of the comatose patient is described in this chapter.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Contralateral and ipsilateral projections"

1

Wilson, Charles L. "Functional Pathways Underlying Ipsilateral and Contralateral Spread of Temporal Lobe Seizures." In Epilepsy and the Corpus Callosum 2, 153–73. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1427-9_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Wilm, Claudia. "Ipsilateral Projections during Development and Regeneration of the Optic Nerve of the Cichlid Fish Haplochromis Burtoni." In The Changing Visual System, 357–59. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3390-0_27.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Moiseeva, N., A. Moiseev, I. Lott, R. Haier, K. Head, U. Ribary, and N. Virji-Babul. "Brain Network Connectivity Dynamics during Voluntary Finger Movement in Right Handed Adults with Down Syndrome: Evidence for Contralateral and Ipsilateral Dominance." In IFMBE Proceedings, 393–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12197-5_93.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wong, Agnes. "Ocular Motor Disorders Caused by Lesions in the Cerebellum." In Eye Movement Disorders. Oxford University Press, 2008. http://dx.doi.org/10.1093/oso/9780195324266.003.0018.

Full text
Abstract:
The vestibulocerebellum consists of the flocculus, ventral paraflocculus, nodulus, and uvula. ■ The flocculus receives inputs from the vestibular nucleus and nerve, nucleus prepositus hypoglossi (NPH), inferior olivary nucleus, cell groups of the paramedian tracts (PMT), nucleus reticularis tegmenti pontis (NRTP), and mesencephalic reticular formation. ■ The ventral paraflocculus receives inputs from contralateral pontine nuclei. ■ Project to ipsilateral superior and medial vestibular nuclei, and the y-group ■ Receive input from the medial and inferior vestibular nuclei, vestibular nerve, NPH, and inferior olivary nucleus ■ Project to the vestibular nuclei ■ The oculomotor vermis consists of parts of the declive, folium, tuber, and pyramis. ■ Receives inputs from the inferior olivary nucleus, vestibular nuclei, NPH, paramedian pontine reticular formation (PPRF), NRTP, and dorsolateral and dorsomedial pontine nuclei ■ Projects to the caudal fastigial nucleus ■ Stimulation of the Purkinje cells in the dorsal vermis elicits contralaterally directed saccades and smooth pursuit ■ Receives inputs from the dorsal vermis, inferior olivary nucleus, and NRTP ■ Decussates and projects via the uncinate fasciculus of the brachium conjunctivum to the contralateral PPRF, rostral interstitial nucleus of the medial longitudinal fasciculus, nucleus of the posterior commissure, omnipause neurons in nucleus raphe interpositus, the mesencephalic reticular formation, and superior colliculus ■ Neurons in the fastigial oculomotor region (FOR) fire during both ipsilateral and contralateral saccades. 1. The contralateral FOR neurons burst before the onset of saccade, and the onset of firing is not correlated with any property of the saccade. 2. Conversely, the time of onset for neurons in the ipsilateral FOR varies, with bursts occurring later for larger saccades. 3. Thus, the difference in time of onset between contralateral and ipsilateral FOR activity encodes the amplitude of saccades (i.e., the larger the difference in time of onset, the larger the saccade amplitude). Eye movement abnormalities in uncinate fasciculus lesion include hypometric ipsilesional saccades and hypermetric contralesional saccades (“contrapulsion”). Arnold-Chiari malformation is a malformation of the medullary–spinal junction with herniation of intracranial contents through the foramen magnum. The three types are illustrated in the figure below.
APA, Harvard, Vancouver, ISO, and other styles
5

Lee, Amy, and Richard G. Ellenbogen. "Unicoronal Synostosis." In Pediatric Neurosurgery, 83–92. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190617073.003.0010.

Full text
Abstract:
Unicoronal synostosis presents with a characteristic head shape including a palpable ridge over the fused suture, ipsilateral flattening of the frontal bone and bulging of the temporal bone, contralateral bulging of the frontal bone, deviation of the nasal radix to the ipsilateral side, and anterior displacement of the ipsilateral ear. Three-dimensional computed tomography will confirm the diagnosis and demonstrate a Harlequin deformity due to elevation of the sphenoid bone. Genetic testing should be considered to rule out an associated mutation. Surgical correction is necessary to allow for normal cranial and brain growth and alleviate future psychosocial impact. Both open and endoscopic techniques are effective treatments. Close monitoring for air embolism will minimize surgical complication.
APA, Harvard, Vancouver, ISO, and other styles
6

Craig, A. D. (Bud). "The Origin of the Interoceptive Pathway." In How Do You Feel? Princeton University Press, 2014. http://dx.doi.org/10.23943/princeton/9780691156767.003.0003.

Full text
Abstract:
This chapter describes the functional and anatomical characteristics of interoceptive processing at the levels of the primary sensory fiber and the spinal cord. The association of the spinothalamic pathway with pain and temperature had already been described in textbooks for years. The clinical evidence indicated that a knife cut that severed the spinal cord on one side produced a loss of pain and temperature sensations only on the opposite (contralateral) side of the body, as tested with pinprick and a cold brass rod, combined with the loss of discriminative touch sensation and skeletal motor function on the same (ipsilateral) side as the injury to the spinal cord. The anatomical basis for this dissociated pattern of sensory loss is the distinctness of the two ascending somatosensory pathways to the brain-discriminative touch sensation in the uncrossed (ipsilateral) dorsal column pathway, and pain and temperature sensations in the crossed (contralateral) spinothalamic pathway.
APA, Harvard, Vancouver, ISO, and other styles
7

Bates, David. "Brainstem syndromes." In Oxford Textbook of Medicine, 4929–32. Oxford University Press, 2010. http://dx.doi.org/10.1093/med/9780199204854.003.02409_update_002.

Full text
Abstract:
Case History—A 78 yr old woman presenting with brainstem signs following a seizure. Brainstem syndromes typically cause ipsilateral cranial nerve lesions and contralateral long tract signs. They are commonly due to brainstem ischaemia, but can also be caused by neoplasia, demyelination, infective and hamartomatous lesions. Imaging, ideally with MRI rather than CT, is obligatory and only then—and possibly following other investigations to identify systemic abnormality or cerebrospinal fluid changes—can appropriate therapy be introduced....
APA, Harvard, Vancouver, ISO, and other styles
8

Walker, Christopher M. "Atelectasis: Opaque Hemithorax." In Chest Imaging, 89–92. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780199858064.003.0016.

Full text
Abstract:
Atelectasis resulting in an opaque hemithorax often indicates serious underlying disease including lung cancer or other tumors, with or without associated pleural effusion. Total lung atelectasis is usually caused by lung cancer obstructing a main bronchus, but can also result from mucus plugging, contralateral intubation of a main stem bronchus, bronchial stricture, or foreign body aspiration. A large amount of fluid and blood may be drawn into the collapsed lung with little or no loss of volume, resulting in a “drowned lung”. Chest radiographic findings of mediastinal shift toward or away from the opaque hemithorax, and associated findings pertaining to superior displacement of the ipsilateral hemidiaphragm and upper abdominal structures help establish volume loss as the etiology of the opaque hemithorax. Absence of these findings indicates preservation of volume in the ipsilateral hemithorax which may indicate the presence of a mass, an obstructing central lesion with associated drowned lung or a large pleural effusion with associated ipsilateral atelectasis. Pneumonectomy will result in an opaque hemithorax secondary to fluid filling of the pneumonectomy space. Unilateral pneumonia is a rare cause of opaque hemithorax.
APA, Harvard, Vancouver, ISO, and other styles
9

Salibian, Arthur. "Ulnar Forearm Flap." In Operative Plastic Surgery, edited by Gregory R. D. Evans, 423–30. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190499075.003.0043.

Full text
Abstract:
The ulnar artery supplies approximately 80% of the forearm skin, making it ideal for use in large head and neck or intraoral defects. Unlike the radial forearm flap, the ulnar forearm flap has consistent proximal perforators that allow designing smaller, thicker flaps for isolated defects. The flap can be used as a reverse flow flap based on the distal ulnar artery to utilize the larger proximal surface area of the forearm. The venous drainage through the basilic vein or the extended vein from the arm allows large-caliber anastomosis to the ipsilateral or contralateral internal or external jugular vein.
APA, Harvard, Vancouver, ISO, and other styles
10

Bates, David. "Brainstem syndromes." In Oxford Textbook of Medicine, edited by Christopher Kennard, 6006–9. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0589.

Full text
Abstract:
The classic presentation of brainstem syndromes, including the long tracts and deficits of cranial nerve nuclei, commonly causes crossed cranial nerve and motor or sensory long tract deficits; the cranial nerve lesions are ipsilateral to the lesion and the long tract signs are contralateral. It is important to assess the extracranial vascular supply to the posterior circulation, especially to listen for bruits over the subclavian vessels and to record the pulse and blood pressure in both upper limbs, remembering that the vertebral arteries arise from the subclavian vessels. Apart from the cranial nerve and long tract deficits, there may be ataxia, vertigo, the presence of an internuclear ophthalmoplegia and unreactive pupils, the symptoms of diplopia and oscillopsia, and the finding of nystagmus or ocular paresis.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Contralateral and ipsilateral projections"

1

Barreira, Raphael Palomo, Vanessa Moraes Rossette, Thomas Zurga Markus Torres, Beatriz Medeiros Correa, Thiago da Cruz Marques, Clara Kimie Miyahira, Natalia Figueiredo Miranda, et al. "Syndrome of one and middle of the vertical look: possible clinical entity associated with percheron artery ischemia: semiological and neuroanatomic aspects." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.467.

Full text
Abstract:
Context: The acute paralysis of the vertical gaze is usually caused by a mesencephalic lesion because the control of the vertical conjugated gaze is found there; there are three main structures: the rostral interstitial nucleus of the medial longitudinal fascicle (riFLM), the Cajal interstitial nucleus and the posterior commissure (CP). The riFLM, contains burst neurons responsible for the saccades, projecting to the subnuclei of the upper rectum and inferior oblique to look upwards and subnuclei of the lower rectum and superior oblique to look downwards. The projections for the elevators appear to be bilateral, with axons probably crossing within the oculomotor nuclear complex and apparently not via CP; depressors, on the other hand, are ipsilateral. Case report: Female, 78 years old, hypertensive and diabetic, suddenly started with vertical diplopia and vertigo. Examination: Bilateral hypoactive photomotor reflex, bilateral paralysis of the vertical gaze upward, monocular paralysis downward and torsional nystagmus in the left eye. Resonance with restriction the diffusion of water molecules in both thalamus and in the right rostral midbrain. Conclusions: riFLM is vascularized by the posterior thalamus-subthalamic paramedian artery. A single artery, Percheron’s, provides both riFLM in 20% of the population and allows bilateral lesions from a single infarction. Unilateral infarction can also cause saccadic paralysis of the bilateral vertical gaze. The disjunctive disorders of the vertical gaze have two variants of the one and a half syndrome. One consists of bilateral paralysis of the gaze upwards and monocular paresis of the gaze downwards with an ipsilateral or contralateral lesion, described in thalamomesencephalic lesions, explanation for the exposed case. The other is due to bilateral mesodiencephalic infarctions. It is difficult to understand the relationship between topography and the vertical gaze circuit, showing that it is more complex than we imagine. It is probably an association of topographies, little described, but of paramount importance to be discussed and researched.
APA, Harvard, Vancouver, ISO, and other styles
2

Jin, Yile, Mingwei Lu, Xiaotian Wang, Shaomin Zhang, Junming Zhu, and Xiaoxiang Zheng. "Electrocorticographic signals comparison in sensorimotor cortex between contralateral and ipsilateral hand movements." In 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2016. http://dx.doi.org/10.1109/embc.2016.7591005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Soni, P., S. Mehta, O. Taha, A. Sinha, K. Chawla, W. Pascal, and Y. Kupfer. "Contralateral Re-Expansion Pulmonary Edema After Ipsilateral Pleural Fluid Drainage: A Rare Case Report." In American Thoracic Society 2020 International Conference, May 15-20, 2020 - Philadelphia, PA. American Thoracic Society, 2020. http://dx.doi.org/10.1164/ajrccm-conference.2020.201.1_meetingabstracts.a6765.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Shah, Alok S., Brian D. Stemper, Narayan Yoganandan, Frank A. Pintar, Nagarajan Rangarajan, Jason Hallman, and Barry S. Shender. "Methodology to Study Attenuation of a Blast Wave Through the Cranium." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62932.

Full text
Abstract:
The purpose of the study was to quantify attenuation of open field shockwaves passing through the PMHS (Post Mortem Human Subject) cranium. A better understanding of the relationship between shockwave characteristics external to the cranium and insults experienced by the brain is essential for understanding injury mechanisms, validation of finite element models, and development of military safety devices for soldiers in the field. These relationships are being developed using experimental PMHS techniques. Our existing shock tube produced open field shockwaves by increasing input pressure behind a Mylar membrane using compressed nitrogen until the membrane burst. Increasing membrane thickness resulted in greater bursting pressure and peak shockwave pressure. Peak pressure decreased predictably with greater distance from the shock tube outlet. Input pressures between 1.6 and 3.2 MPa resulted in peak shockwave pressures between 45 kPa and 90 kPa measured between 40 and 60 cm from the shock tube exit. The experimental protocol consisted of obtaining a PMHS head, filling the voided cranium with Sylgard gel, and securing the head in front of the shock tube using a Hybrid III dummy neck. Pressure transducers were mounted on the external cranium surface on the ipsilateral side and on the internal cranium surface on the ipsilateral and contralateral sides. Because the specimen was tested in multiple orientations, the ipsilateral side referred to the frontal or temporal sides. Transducers were mounted prior to adding the Sylgard gel. Data from all tests indicated shockwave rise times less than 10 μs external to the skull and internal to the skull on the ipsilateral side. Therefore, the sampling rate was 10 MHz using a digital oscilloscope. Shockwave characteristics were quantified including peak overpressure, peak underpressure, and duration of positive phase. The results show peak overpressure attenuations between 14 and 26% from the external ipsilateral transducer to the contralateral transducers in frontal and lateral orientation. In addition, there was a 93–96% reduction in the rate of onset between those transducers. Each characteristic may affect injury type/severity. This setup can be used to understand injury mechanisms for blast-induced mTBI, to quantify effects of interventions (e.g., helmets) on attenuation of open field blast waves, and for validation of finite element models.
APA, Harvard, Vancouver, ISO, and other styles
5

Hotson, G., M. S. Fifer, S. Acharya, W. S. Anderson, N. V. Thakor, and N. E. Crone. "Electrocorticographic decoding of ipsilateral reach in the setting of contralateral arm weakness from a cortical lesion." In 2012 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2012. http://dx.doi.org/10.1109/embc.2012.6346869.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Shumikhina, Svetlana, and Sergei Kozhukhov. "CHANGES IN ORIENTATION SELECTIVITY MAPS IN THE CONTRALATERAL AND IPSILATERAL CAT VISUAL CORTEX AFTER PROPOFOL BOLUS INJECTION." In XVIII INTERNATIONAL INTERDISCIPLINARY CONGRESS NEUROSCIENCE FOR MEDICINE AND PSYCHOLOGY. LCC MAKS Press, 2022. http://dx.doi.org/10.29003/m3005.sudak.ns2022-18/396-397.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Brown, Matthew, Hyun J. G. Kim, Fereidoun G. Abtin, Maya Galperin-Aizenberg, Richard Pais, Irene Da Costa, Arash Ordookhani, Daniel Chong, Chiayi Ni, and Jonathan Goldin. "Minimally Invasive Emphysema Lung Volume Reduction: Effects Of Target Lobe Atelectasis On The Ipsilateral And Contralateral Lobes." In American Thoracic Society 2010 International Conference, May 14-19, 2010 • New Orleans. American Thoracic Society, 2010. http://dx.doi.org/10.1164/ajrccm-conference.2010.181.1_meetingabstracts.a5419.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Null, G., D. B. Gandhi, R. J. Fleck, P. S. Kingma, J. C. Woods, and N. Higano. "Ipsilateral and Contralateral Lung Function Prior to Repair in Neonatal Congenital Diaphragmatic Hernia via Quantitative Lung MRI." In American Thoracic Society 2022 International Conference, May 13-18, 2022 - San Francisco, CA. American Thoracic Society, 2022. http://dx.doi.org/10.1164/ajrccm-conference.2022.205.1_meetingabstracts.a5296.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Amin, Amanda L., Irene B. Helenowski, Thomas E. Kmiecik, Shruti R. Zaveri, Nora M. Hansen, Kevin P. Bethke, and Seema A. Khan. "Abstract P1-01-05: Effects of preoperative MRI on rate of ipsilateral and contralateral recurrence of breast cancer." In Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium; December 9-13, 2014; San Antonio, TX. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.sabcs14-p1-01-05.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Higham, Anna M., Irene B. Helenowski, Shruti R. Zaveri, Daniel H. Schneider, Nora M. Hansen, Kevin P. Bethke, and Seema A. Khan. "Abstract P6-13-06: Tamoxifen acceptance by DCIS patients and effect on subsequent ipsilateral and contralateral breast events." In Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium; December 9-13, 2014; San Antonio, TX. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.sabcs14-p6-13-06.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Contralateral and ipsilateral projections"

1

Yu, Beibei, Yongfeng Zhang, and Shouping Gong. Effects of miRNA-modified exosomes alleviate cerebral ischemic reperfusion injury in Pre-clinical Studies: A Meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, May 2022. http://dx.doi.org/10.37766/inplasy2022.5.0062.

Full text
Abstract:
Review question / Objective: The purpose of this study was to investigate the effect of miRNA-modified exosomes in alleviating cerebral ischemic reperfusion injury compared with the non-treatment group. The research object is an animal model of middle cerebral artery occlusion. The research method is a controlled study. The primary outcome of this study was infarct volume, and the secondary outcome was neurobehavioral performance. Main outcome(s): The primary outcome of this study was Infarct volumes，which was measured by 2,3,5-triphenyltetranzolium chloride (TTC) staining. And it was calculated as followed: Infarct volume % = lesion area of each section = (contralateral hemisphere area/ipsilateral hemisphere area) × ipsilateral lesion area. Neurobehavioral performance was the secondary outcome, and was assessed by three scoring scales: modified neurological severity score (mNSS), Longa scoring system and neurological deficit score (NDS).
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Contralateral and ipsilateral projections' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography