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Tesi sul tema "Evoked potentials, Visual"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 3 febbraio 2022

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1

Bergkvist, Linn. "Visual Evoked Potentials : Referensvärden och könsskillnader." Thesis, Umeå universitet, Biomedicinsk laboratorievetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-171567.

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2

O’Toole, Dennis Michael. "Removal of ocular artifact from visual evoked response recordings." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25502.

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Abstract (sommario):

Potentials generated by the eye cause unwanted artifact in Visual Evoked Response (VER) recordings. These artifacts often contaminate the data in a systematic way that can lead to spurious experimental results. Although it is widely agreed that ocular artifact must be accounted for, the methods used to deal with this problem are varied. The present study compared four methods used to control ocular artifact; blink rejection, eyes closed, subtraction and regression. Twenty normal, female subjects were tested twice within the same session. Subjects watched light flashes of 4 intensities; 2, 30,

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3

Mackay, Alison. "Assessing children's visual acuity with steady state evoked potentials." Thesis, University of Glasgow, 2003. http://theses.gla.ac.uk/6573/.

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The majority of children attending ophthalmology clinics require a visual acuity assessment. The optimal technique depends on age as well as the ability to cooperate with testing. Most acuity assessments are performed subjectively by an orthoptist. Objective acuity assessment by Visual Evoked Potential (VEP) provides a complementary assessment in those subjects who cannot complete subjective tests. The aim of this study was to develop and evaluate a rapid, objective visual acuity assessment. The technique was named the step_ VEP and is based on the real-time analysis of steady-state VEPs (ssVE

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4

Calvert, Julie. "Visual evoked potentials in normal aging and Alzheimer's disease." Thesis, Glasgow Caledonian University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395798.

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5

Khalil, Nofal Mohammed. "Investigations of visual function in migraine by visual evoked potentials and visual psychophysical tests." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/8336.

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6

Simpson, David Gordon Giles, and dsimpson@swin edu au. "Instrumentation for high spatial resolution of steady state visual evoked potentials." Swinburne University of Technology, 1998. http://adt.lib.swin.edu.au./public/adt-VSWT20060711.123100.

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This thesis reports on several new and innovative instrumentation developments to solve some of the problems of brain activity monitoring, particularly SSVEP (Steady State Visual Evoked Potentials) studies. SSVEP systems generate suitable stimuli and record the resulting brain biopotentials from scalp electrodes. The instrumentation is configured as a 'Neuropsychiatric Workstation', supporting up to 136 scalp electrodes. Operating in the SSVEP mode, the Neuropsychiatric Workstation reported here significantly improves upon the previously reported spatial resolution and accuracy of maps related

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7

Matthews, David. "Dissociation of P300 brain potentials evoked by rare visual stimuli." Thesis, University of St Andrews, 1995. http://hdl.handle.net/10023/14732.

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Abstract (sommario):

The P300 event related potential (ERP) has consistently been dissociated into separate components on the basis of scalp amplitude distribution within the auditory modality (for instance Squires et al. 1975). A parietally maximum P300 deflection being evoked in response to target stimuli in comparison with a more frontally maximum P300 deflection evoked in response to rare nontarget stimuli. Results obtained within experiment 1 and 6 demonstrated such a dissociation employing auditory stimuli within a three stimulus oddball paradigm. It did not prove possible to obtain such a dissociation of P3

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8

Marshall, David. "Brain-computer games interfacing with motion-onset visual evoked potentials." Thesis, Ulster University, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685554.

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A brain-computer interface (BCI) measures brain activity and translates this activity into commands for a program to execute. BCls enable movement-free communication and interaction with technologies. This thesis evaluates the effectiveness and limitations of motion-onset visual evoked potentials (mVEP) based BCI as a control method for brain-computer games interaction. MVEP incorporates neural activity from the dorsal pathway of the visual system which allows more elegant visual stimuli than other types ofVEP and has yet to be used in computer games. This thesis investigates ifmVEP can be use

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9

Lloyd, Robyn School of Optometry &amp Visual Science UNSW. "Achromatic and chromatic VEPs in adults with down syndrome." Awarded by:University of New South Wales. School of Optometry and Visual Science, 2005. http://handle.unsw.edu.au/1959.4/23957.

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Previous studies have found that spatial processing in children and adults with Down syndrome is different in comparison to the normal population. Some previous studies have also found that there is a high prevalence of colour vision deficiencies in people with Down syndrome. The aim of the present study was to use an objective test, the transient visual evoked potential (VEP), to assess achromatic and chromatic visual processing in adults with Down syndrome. Achromatic VEPs were recorded in response to black-white stimuli presented in patternreversal mode. Chromatic VEPs were recorded in resp

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10

Shawkat, Fatima Suham. "Pattern visual evoked potentials : comparison of onset, reversal and offset components." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266482.

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11

McGlone, Laura. "Flash visual evoked potentials and early visual development in infants born to drug misusing mothers." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3184/.

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Background / Aims: Maternal drug misuse in pregnancy is a significant clinical and public health problem. Consequences for the newborn infant include prematurity, intrauterine growth restriction (IUGR) and neonatal abstinence syndrome (NAS). There is increasing evidence that maternal drug misuse in pregnancy may have longer term adverse effects on infant visual and neurodevelopmental outcome. Most of the evidence regarding visual outcomes in particular derives from small uncontrolled studies with a lack of adequately powered, controlled studies to date. The visual evoked potential (VEP) can be

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12

Flanagan, John G. "Automated assessment of visual fields and their inter-relation to evoked potentials in visual disorders." Thesis, Aston University, 1985. http://publications.aston.ac.uk/14594/.

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The Octopus Automated Perimeter was validated in a comparative study and found to offer many advantages in the assessment of the visual field. The visual evoked potential was investigated in an extensive study using a variety of stimulus parameters to simulate hemianopia and central visual field defects. The scalp topography was recorded topographically and a technique to compute the source derivation of the scalp potential was developed. This enabled clarification of the expected scalp distribution to half field stimulation using different electrode montages. The visual evoked potential follo

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13

Highsmith, Jennifer Rea. "Changes in chromatic pattern-onset VEP with full-body inversion." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1446433.

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14

Westerfield, Marissa Anne Navarrete. "The role of the cerebellum in visual spatial attention : an event-related potential study /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1999. http://wwwlib.umi.com/cr/ucsd/fullcit?p9952646.

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15

Beneish, Raquel Gabriela. "Pattern reversal visual evoked potentials in children with strabismic and with anisometropic amblyopia." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61883.

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16

Gembler, Felix [Verfasser]. "Parameter Optimization for Brain-Computer Interfaces based on Visual Evoked Potentials / Felix Gembler." Bielefeld : Universitätsbibliothek Bielefeld, 2020. http://d-nb.info/1222672227/34.

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17

Beveridge, Ryan. "An assessment of factors influencing neurogaming with motion-onset visual evoked potentials (mVEPs)." Thesis, Ulster University, 2018. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.736777.

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Abstract (sommario):

Brain-computer interface (BCI) technology offers movement-independent control of computer applications by translating cortical activity into semantic control signals for a computer to execute. One prominent application of BCI technology is brain-computer games interfacing (BCGI) or neurogaming. This thesis aimed to advance the field of neurogaming and is an account of the work conducted whilst investigating the feasibility of employing motion-onset visual evoked potentials (mVEPs) for control in a range of neurogames and the factors that influence performance when employing such a control stra

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18

Siegel, Lance Mitchell. "The Analysis of 3-Channel "Vector" Visual Evoked Potentials and Possible Neuroanatomical Correlates." VCU Scholars Compass, 1990. http://scholarscompass.vcu.edu/etd/5102.

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he use of evoked potentials to evaluate the functional integrity of neuronal pathways has become a useful and accepted practice in clinical medicine. The use of visual evoked potentials for assisting in the diagnosis of such diseases as optic neuritis and multiple sclerosis is also well recognized. However, the visual evoked potential, unlike the auditory evoked potentials, lacks a well deﬁned electrophysiological to neuroanatomical correlation; especially that of a signiﬁcant non-cortical component. Currently, visual evoked potentials rely principally on the measurement of a cortical (occipit

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19

Doran, Matthew M. "The role of visual attention in multiple object tracking evidence from ERPS." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 110 p, 2009. http://proquest.umi.com/pqdweb?did=1885675151&sid=5&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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20

Camargo, Marina von Zuben de Arruda. "Propriedades espaço-temporais da acuidade vernier no córtex visual humano usando potenciais visuais provocados de varredura." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/47/47135/tde-12062012-160008/.

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Esta pesquisa pretendia estabelecer um mapa espaço temporal das respostas de vernier no córtex visual humano. O uso do potencial visual provocado de varredura (PVPv) proporciona medidas eficientes e sensíveis dos limiares de vernier com os quais se pode começar a examinar as respostas corticais de vernier no âmbito dos parâmetros espaço temporais. As respostas de vernier foram avaliadas em relação à hipótese de que os sinais retinianos provenientes das células ganglionares da via magnocelular e não da via parvocelular compõem o input neural para córtex que é utilizado para gerar as respostas d

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21

Lai, Sui-man, and 賴萃文. "Design of a time-encoded visual stimulation method for brain computer interface based on chromatic transient visual evoked potentials." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43085829.

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22

Lai, Sui-man. "Design of a time-encoded visual stimulation method for brain computer interface based on chromatic transient visual evoked potentials." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43085829.

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23

Padhiar, Sanjita. "Study of the cholinergic factors affecting the flash and pattern reversal visual evoked potentials." Thesis, Aston University, 1993. http://publications.aston.ac.uk/14601/.

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The effects of cholinergic agents undergoing clinical trials for the treatment of Alzheimer's disease and the anticholinergic agent scopolamine, were investigated on the components of the flash and pattern reversal visual evoked potentials (VEPs) in young healthy volunteers. The effect of recording the flash and pattern reversal VEPs for 13 hours in 5 healthy male volunteers, revealed no statistically significant change in the latency or amplitude measures. Administration of the muscarinic agonist SDZ 210-086 to 16 healthy male volunteers resulted in the reduction of the flash N2-P2 and patter

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24

Nagle, Mark. "The association between glycated haemoglobin levels and P100 visual evoked potentials in diabetes mellitus." Thesis, Aston University, 2016. http://publications.aston.ac.uk/28805/.

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Abstract (sommario):

Diabetes mellitus (DM) is a metabolic disorder which is characterised by hyperglycaemia resulting from defects in insulin secretion, insulin action or both. The long-term specific effects of DM include the development of retinopathy, nephropathy and neuropathy. Cardiac disease, peripheral arterial and cerebrovascular disease are also known to be linked with DM. Type 1 diabetes mellitus (T1DM) accounts for approximately 10% of all individuals with DM, and insulin therapy is the only available treatment. Type 2 diabetes mellitus (T2DM) accounts for 90% of all individuals with DM. Diet, exercise,

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25

Wong, Chi Man. "Phase information enhanced steady-state visual evoked potential-based brain-computer interface." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493316.

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26

Schenk, Eric R. "Detection of specific steady-state visual evoked potentials when multiple frequencies are available for stimulation." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176401258.

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27

Pinsanor, Preeyanun. "Insamling av referensvärden för Visual evoked potentials (VEP) hos friska individer vid Centralsjukhuset i Karlstad." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-69415.

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28

Nordin, Henni. "Jämförelse av avstånd mellan bildskärm och patient genom analys av latens vid Visual Evoked Potentials." Thesis, Umeå universitet, Biomedicinsk laboratorievetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185413.

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29

Schenk, Eric R. "Detection of specific steady-state visual evoked potentials when multiple frequencies are available for simulation." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176401258.

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30

Burton, Pamela Ann. "Physiological evidence of interactive object-based and space-based attention mechanisms." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 50.79Mb,139 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/3157279.

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31

Pereira, Silvana Alves. "Avaliação da acuidade visual em crianças com hidrocefalia : um estudo eletrofisiológico por potencial visual evocado de varredura." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/47/47135/tde-10062008-105554/.

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O objetivo do estudo foi medir a acuidade visual (AV) em crianças com diagnóstico de hidrocefalia, apresentando ou não a válvula de derivação ventricular (DVP). Participaram da pesquisa um total de 55 crianças (34 F e 21M) com diagnóstico de hidrocefalia (45 com DVP e 10 sem DVP), com idade entre zero a 291 semanas (média 74 semanas). A AV foi medida pela técnica do Potencial Visual Evocado de Varredura e os resultados foram comparados a valores de referência (Norcia, 1985b). Os diagnósticos etiológicos que levaram à hidrocefalia foram: hemorragia intracraniana (25 crianças), mielomeningocele

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32

Carmona, Francisco Manuel Moreno. "Desenvolvimento da acuidade visual de resolução de grades de cães da raça terrier brasileiro pelo método do potencial visual evocado de varredura." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-11072007-090535/.

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O objetivo deste trabalho foi medir o desenvolvimento da acuidade visual (AV) de resolução de grades de filhotes de cães da raça Terrier Brasileiro utilizando-se o método do potencial visual evocado de varredura (PVEV). Foram mensuradas as AVs de resolução de grades de 18 cães da raça Terrier Brasileiro, 14 filhotes (8 machos e 6 fêmeas), de duas ninhadas diferentes e 4 adultos (2 machos e 2 fêmeas, incluindo-se a matriz). Os PVEVs (NuDiva) foram registrados a partir de dois eletrodos ativos posicionados no escalpo em O1 e O2, um eletrodo referência posicionado em OZ e um eletrodo terra em CZ.

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33

Arctaedius, Jenny. "Processing of task-irrelevant sounds while performing a visual task : A study of auditory steady-state evoked potentials." Thesis, Stockholms universitet, Psykologiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-180695.

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Perceptual capacity and selection in attention have for long been an interest in cognitive science, with early theories of early selection to late selection. Hearing is an important subject to investigate when it comes to attention and early auditory processing can be investigated by using auditory steady state responses (ASSRs). Studies on ASSRs to irrelevant sounds have investigated the 40 Hz ASSR and concluded no effect of load. As studies on temporal activation of ASSRs indicate that lower and higher frequencies activate different stages of the auditory pathway, there is a need to investig

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34

Challa, Naveen K. "An electrophysiological study of chromatic processing in the human visual system. Using visual evoked potentials and electroretinograms to study cortical and retinal contributions to human trichromatic vision." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5343.

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The work in this thesis is concerned with examining the retinal and cortical contributions to human trichromatic colour vision. Chromatic processing at the cortex level was examined using visual evoked potentials (VEPs). These responses were elicited by chromatic spot stimuli, which were manipulated in order to selectively activate the chromatic processing system. Chromatic processing at the retinal level was examined using the electroretinograms (ERGs) for which cone isolating stimuli were used to assess the nature of L and M cone inputs to cone-opponent mechanisms. The results from the VEP

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35

Walker, Pamela M. "Own- versus other-race face perception : social contact and the human brain." Thesis, University of Oxford, 2006. http://ora.ox.ac.uk/objects/uuid:2d79e338-7197-40e4-a9d5-94d160125c45.

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The experiments in this thesis used behavioural measures and event-related potentials (ERPs) to investigate the influence of race on face processing in the brain. Previous behavioural research has highlighted an own-race effect in face processing, whereby individuals are more accurate at recognizing own-race compared to other-race faces. The current Thesis examined the own-race effect at perceptual and neural levels. Social influences on the own-race effect were also investigated, such as other-race experience, anxiety and implicit social bias, as these may account for differential own- versus

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36

Gaume, Antoine. "Towards cognitive brain-computer interfaces : real-time monitoring of visual processing and control using electroencephalography." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066137/document.

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Les interfaces cerveau-machine (ICM) ouvrent des voies de communication alternatives entre le cerveau et son environnement. Elles peuvent être utilisées pour supplanter une fonction biologique défaillante ou pour permettre de nouveaux modes d’interaction à l’utilisateur. Les ICM de sortie, dont le fonctionnement se base sur la lecture de données biologiques, nécessitent la mesure de signaux de contrôle stables dans le temps et dans la population. La recherche de tels signaux et leur calibration sont des étapes clefs dans la conception d’une ICM. Cette étude s’intéresse en premier lieu aux ICM

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37

Johansson, Björn. "A study of some temporal properties of the human visual evoked potential, and their relation to binocular function /." Linköping : Linköping University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7584.

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38

Palladino, G., S. Loizzo, A. Fortuna, S. Canterini, F. Palombi, R. P. Erickson, F. Mangia та M. T. Fiorenza. "Visual evoked potentials of Niemann-Pick type C1 mice reveal an impairment of the visual pathway that is rescued by 2-hydroxypropyl-ẞ-cyclodextrin". BioMed Central, 2015. http://hdl.handle.net/10150/610327.

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BACKGROUND: The lysosomal storage disorder, Niemann Pick type C1 (NPC1), presents a variable phenotype including neurovisceral and neurological symptoms. 2-Hydroxypropyl-ss-cyclodextrin (HPssCD)-based therapies are presently the most promising route of intervention. While severe cerebellar dysfunction remains the main disabling feature of NPC1, sensory functions including auditory and olfactory ones are also affected. Morphological and functional anomalies of Npc1 (-/-) mouse retina have also been observed, although the functional integrity of the visual pathway from retina to visual cortex is

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39

Challa, Naveen Kumar. "An electrophysiological study of chromatic processing in the human visual system : using visual evoked potentials and electroretinograms to study cortical and retinal contributions to human trichromatic vision." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5343.

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Abstract (sommario):

The work in this thesis is concerned with examining the retinal and cortical contributions to human trichromatic colour vision. Chromatic processing at the cortex level was examined using visual evoked potentials (VEPs). These responses were elicited by chromatic spot stimuli, which were manipulated in order to selectively activate the chromatic processing system. Chromatic processing at the retinal level was examined using the electroretinograms (ERGs) for which cone isolating stimuli were used to assess the nature of L and M cone inputs to cone-opponent mechanisms. The results from the VEP e

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40

Lee, Jin. "How fast can we see? : the latency development in human infants to pattern, orientation, and direction-reversal visual evoked potentials." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:09c7d3e8-7031-43e4-b03a-fe2dba219ceb.

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The goal of this thesis is to track latency changes in three visual evoked potentials (VEP) stimuli as an indication of overall brain development, in order to provide a normative baseline to differentiate visual and neurological development from pathological processes. VEP- neural electrical activity recorded from the scalp surface and synchronized with visual stimulus transitions- is one of the common techniques in understanding infant vision development. Past work has concentrated on responses to pattern reversal and to the latency of the initial positive peak. Here we compare the timing of

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41

Notbohm, Annika [Verfasser], Christoph Siegfried [Akademischer Betreuer] Herrmann, and Jonas [Akademischer Betreuer] Obleser. "The role of Steady- State Visual Evoked Potentials in the study of brain oscillations / Annika Notbohm ; Christoph Siegfried Herrmann, Jonas Obleser." Oldenburg : BIS der Universität Oldenburg, 2017. http://d-nb.info/1127208616/34.

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42

Notbohm, Annika [Verfasser], Christoph S. [Akademischer Betreuer] Herrmann, and Jonas [Akademischer Betreuer] Obleser. "The role of Steady- State Visual Evoked Potentials in the study of brain oscillations / Annika Notbohm ; Christoph Siegfried Herrmann, Jonas Obleser." Oldenburg : BIS der Universität Oldenburg, 2017. http://nbn-resolving.de/urn:nbn:de:gbv:715-oops-30990.

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43

Oliveira, André Gustavo Fernandes de. "Desenvolvimento das funções de acuidade visual e sensibilidade ao contraste visual medidas por potenciais visuais provocados de varredura em crianças nascidas a termo e prematuras." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/47/47135/tde-07012008-162937/.

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A prematuridade ao nascimento é um fator de risco para a visão, podendo causar retinopatia, uma condição em que há descolamento da retina. Retinopatia da prematuridade ocorre em uma parcela relativamente pequena dos recém nascidos prematuros e não sabemos se os demais, cujo desenvolvimento visual é aparentemente normal, seguem de fato o mesmo curso que o observado em bebes nascidos após uma gestação completa, ou se também sofrem algum prejuízo devido ao nascimento prematuro. Alternativamente, estes bebês poderiam ter um desenvolvimento visual acelerado pela sua exposição mais longa ao mundo vi

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44

França, Valtenice de Cássia Rodrigues de Matos. "Desenvolvimento da acuidade visual e sensibilidade ao contraste em recém-nascidos pequenos para a idade gestacional por potenciais visuais evocados de varredura." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/47/47132/tde-19032013-144632/.

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Objetivo: Avaliar o desenvolvimento da Acuidade Visual (AV) de resolução de grades e a Sensibilidade ao Contraste (SC) de recém-nascidos de termo pequenos para a idade gestacional (PIG). Método: Medimos a AV e a SC de 126 recém-nascidos de termo com o potencial visual evocado de varredura (PVEv; Norcia & Tyler 1985). 73 recém-nascidos (Média de Idade = 11,3 ± 4,3 semanas) nasceram com o peso adequado para a idade gestacional - AIG (percentil 10; Alexander et al., 1996) e 53 recém-nascidos (Média de Idade = 9,2± 3,8 semanas) nasceram pequenos para a idade gestacional - PIG (percentil <10). Medi

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45

Costa, Thiago Leiros. "Repercussões visuais da exposição ocupacional a uma mistura de solventes orgânicos: visão cromática e acromática em frentistas brasileiros." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/47/47132/tde-09022011-113352/.

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Objetivo: Avaliar repercussões da exposição ocupacional a uma mistura de solventes orgânicos sobre o desempenho visual de um grupo de frentistas. Método: Foram aplicados testes de ordenamento e discriminação de matizes, campo visual e sensibilidade ao contraste espacial de luminância em 25 frentistas (20 homens, M=36,4 anos, DP=8,9) e 25 controles sem histórico de exposição crônica a solventes (10 homens, M=33,8 anos, DP=8,8). As concentrações metabólitos urinários de tolueno (M=0,3 g/g de creatinina; DP=0,16) e xileno (M=0,1 g/g de creatinina; DP=0,02) e o tempo de trabalho (M=9,6 anos; DP=6,

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46

Silva, Andrei Damian da. "Desenvolvimento de um dispositivo SSVEP rápido e confiável utilizando eletrodos a seco e frequências acima de 25 Hz." Universidade Federal de Goiás, 2018. http://repositorio.bc.ufg.br/tede/handle/tede/8215.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2018-03-13T17:24:13Z No. of bitstreams: 2 Dissertação - Andrei Damian da Silva - 2018.pdf: 2168750 bytes, checksum: 4d47d811f294faae439470b427c48f3e (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-03-14T10:57:00Z (GMT) No. of bitstreams: 2 Dissertação - Andrei Damian da Silva - 2018.pdf: 2168750 bytes, checksum: 4d47d811f294faae439470b427c48f3e (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>

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47

Turi, Federica. "Interface cerveau-ordinateur adaptée à l'utilisateur." Thesis, Université Côte d'Azur, 2020. https://tel.archives-ouvertes.fr/tel-03149221.

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Les interfaces cerveau-ordinateur (Brain-Computer Interface ou BCI) permettent la communication entre l’utilisateur et la machine, grâce à la traduction de l’activité cérébrale en commandes qui servent à contrôler différents dispositifs. De nombreuses limitations empêchent la diffusion des systèmes BCI dans des applications réelles, telles que la phase de calibration qui résulte de la variabilité entre sessions et entre sujets. Cette phase est fondamentale car elle permet de régler les paramètres nécessaires pour le bon fonctionnement du système, mais elle est considérée beaucoup trop longue e

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Haro, Filomena Maria Buosi de. "Desenvolvimento da acuidade visual de resolução de grades em prematuros durante o primeiro ano de vida : estudo eletrofisiológico pelo registro dos potenciais visuais evocados de varredura." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/5/5141/tde-08092014-142658/.

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Objetivos: determinar a acuidade visual de resolução de grades (AV) durante o primeiro ano de vida por meio dos registros dos potenciais visuais evocados de varredura em grupos de crianças nascidas prematuramente (RNPT) e a termo (RNT); comparar os valores finais da AV no grupo RNPT em relação à idade gestacional e ao desenvolvimento neuropsicomotor e comparar as curvas de desenvolvimento visual entre os grupos RNPT e RNT. Casuística e métodos: Estudo realizado em 25 RNT e 36 RNPT acompanhados em ambulatório e submetidos a avaliações oftalmológica e neuropediátrica. O grupo RNPT foi dividido e

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49

Torres, Soriano Desireé. "Electrodiagnóstico: protocolo clínico y estandarización de Electrorretinografía (ERG)y Potenciales Evocados Visuales (PEV)en el perro beagle." Doctoral thesis, Universidad de Murcia, 2010. http://hdl.handle.net/10803/10991.

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La presente tesis se ha basado en conseguir dos objetivos fundamentales: diseñar un protocolo clínico de electrodiagnóstico para obtener el electrorretinograma (ERG) y los potenciales evocados visuales (PEV) en el perro beagle, y elaborar un estándar de los resultados para esta raza.Hemos establecido un protocolo clínico de electrodiagnóstico adaptado a nuestro equipo de diagnóstico, a las características de nuestros pacientes y, en general, a los recursos materiales que teníamos a nuestra disposición. De este modo, hemos conseguido realizar un protocolo de corta duración que nos permite evalu

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Istrefaj, Mirushe Mjekiqi. "MÄTNING AV SYNNERVENS FUNKTION." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26613.

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Visual Evoked Potentials (VEP) är en elektrofysiologisk undersökningsmetod som används inom klinisk neurofysiologi. Undersökningen görs för att analysera synnervsfunktionen. Metoden går ut på att mäta den tid det tar för synbarken att registrera visuella synintrycken som näthinnan utsätts för. För att en optimal tolkning av det människan ser ska kunna ske måste elektriska signaler kunna fortledas från näthinnan till synbarken via en fullt fungerande, frisk synnerv. Skador på synnerven beror oftast på optikusneurit och misstänks oftast vara ett tidigt tecken multipel skleros. Undersökningen är

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