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Journal articles on the topic 'Hemisphere'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Ikkert, Oksana, Tetiana Korol, Kateryna Hlazunova, and Iryna Tsinkevych. "The Impact of Functional Asymmetry of the Cerebral Hemispheres in Students of a Physics and Mathematics Lyceum on the Learning Outcomes." Journal of Vasyl Stefanyk Precarpathian National University 12, no. 1 (2025): 142–50. https://doi.org/10.15330/jpnu.12.1.142-150.

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The functional asymmetry of the human brain hemispheres (motor, sensory, and mental) reflects the differences in the distribution of neuro-psychic functions between the left and right hemispheres. The left hemisphere is responsible for the brain's abstract-logical, inductive thinking, and verbal-analytical functions. The right hemisphere provides visual-figurative, deductive thinking. The dominance of the left hemisphere determines left-hemispheric thinking, while the dominance of the right hemisphere determines right-hemispheric thinking. The synchronous functioning of both hemispheres indica

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Miller, Michael B., Alan Kingstone, and Michael S. Gazzaniga. "Hemispheric Encoding Asymmetry is More Apparent Than Real." Journal of Cognitive Neuroscience 14, no. 5 (2002): 702–8. http://dx.doi.org/10.1162/08989290260138609.

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Previous neuroimaging studies have claimed a left hemisphere specialization for episodic “encoding” and a right hemisphere specialization for episodic “retrieval.” Yet studies of split-brain patients indicate relatively minor memory impairment after disconnection of the two hemispheres. This suggests that both hemispheres are capable of encoding and retrieval. In the present experiment, we examined the possible limits on encoding capacity of each hemisphere by manipulating the “depth” of processing during the encoding of unfamiliar faces and familiar words in the left and right hemispheres of

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Friedrich, Patrick, Kaustubh R. Patil, Lisa N. Mochalski, et al. "Is it left or is it right? A classification approach for investigating hemispheric differences in low and high dimensionality." Brain Structure and Function 227, no. 2 (2021): 425–40. http://dx.doi.org/10.1007/s00429-021-02418-1.

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AbstractHemispheric asymmetries, i.e., differences between the two halves of the brain, have extensively been studied with respect to both structure and function. Commonly employed pairwise comparisons between left and right are suitable for finding differences between the hemispheres, but they come with several caveats when assessing multiple asymmetries. What is more, they are not designed for identifying the characterizing features of each hemisphere. Here, we present a novel data-driven framework—based on machine learning-based classification—for identifying the characterizing features tha

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4

Chowdhury, Partha, Ravindra Belur, Luca Bertello, and Alexei A. Pevtsov. "Analysis of Solar Hemispheric Chromosphere Properties using the Kodaikanal Observatory Ca–K Index." Astrophysical Journal 925, no. 1 (2022): 81. http://dx.doi.org/10.3847/1538-4357/ac3983.

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Abstract The Kodaikanal Observatory has provided long-term synoptic observations of chromospheric activities in the Ca ii K line (393.34 nm) since 1907. This article investigates temporal and periodic variations of the hemispheric Ca–K-index time series in the low-latitude zone (±40°), utilizing the recently digitized photographic plates of Ca–K images from the Kodaikanal Observatory for the period of 1907–1980. We find that the temporal evolution of the Ca–K index differs from one hemisphere to another, with the solar cycle peaking at different times in the opposite hemisphere, except for cyc

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Shibahara, Naoki, and Brennis Lucero-Wagoner. "Hemispheric Asymmetry in Accessing Word Meanings: Concrete and Abstract Nouns." Perceptual and Motor Skills 94, no. 3_suppl (2002): 1292–300. http://dx.doi.org/10.2466/pms.2002.94.3c.1292.

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The present experiments investigated hemispheric differences in the brain in accessing concrete and abstract word meanings. For this purpose, an automatic semantic priming paradigm was used with a short stimulus onset asynchrony between prime and target (250 msec.) as well as a low proportion of related trials. (20%). Analysis showed that for concrete nouns, priming effects were observed in both hemispheres. There was greater priming in the right hemisphere, suggesting hemispheric differences in accessing semantic representations of concrete nouns. For abstract nouns, on the other hand, primin

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Hsiao, Janet H., Ben Cipollini, and Garrison W. Cottrell. "Hemispheric Asymmetry in Perception: A Differential Encoding Account." Journal of Cognitive Neuroscience 25, no. 7 (2013): 998–1007. http://dx.doi.org/10.1162/jocn_a_00377.

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Hemispheric asymmetry in the processing of local and global features has been argued to originate from differences in frequency filtering in the two hemispheres, with little neurophysiological support. Here we test the hypothesis that this asymmetry takes place at an encoding stage beyond the sensory level, due to asymmetries in anatomical connections within each hemisphere. We use two simple encoding networks with differential connection structures as models of differential encoding in the two hemispheres based on a hypothesized generalization of neuroanatomical evidence from the auditory mod

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7

Xue, Jiaqing, Bingchao Wang, Yongkui Yu, Jianping Li, Cheng Sun, and Jiangyu Mao. "Multidecadal variation of northern hemisphere summer monsoon forced by the SST inter-hemispheric dipole." Environmental Research Letters 17, no. 4 (2022): 044033. http://dx.doi.org/10.1088/1748-9326/ac5a65.

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Abstract The sea surface temperature inter-hemispheric dipole (SSTID) is an important variability mode of global SST anomalies, characterized by an anti-phase variation of SST between the two hemispheres. In this study, the decadal variation of the northern hemisphere summer monsoon (NHSM) is found to be strongly regulated by the SSTID, with positive (negative) phases of the SSTID corresponding to the strengthening (weakening) of NHSM. Both observation and SST-forced atmospheric model simulations suggest that the SSTID related thermal forcing modulates the NHSM by causing planetary-scale atmos

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8

Nikolaenko, N. N., A. Y. Egorov, and E. A. Freiman. "Representation Activity of The Right and Left Hemispheres of the Brain." Behavioural Neurology 10, no. 2-3 (1997): 49–59. http://dx.doi.org/10.1155/1997/101703.

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Drawings by psychiatric patients were studied in various states (i) in depression; (ii) after neuroleptic injection; and (iii) during left hemisphere suppression induced by unilateral electroconvulsive seizure (UES). In these states, right hemisphere activation predominates. The results of the study demonstrate that, under the predominance of right hemisphere activation over the left hemisphere, there is a tendency to reproduce the image of the object and to represent it in near space. Drawings by psychiatric patients were also investigated in (i) the manic state; (ii) after injection of psych

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9

Shibahara, Naoki, and Brennis Lucero-Wagoner. "Access to Concrete Word Meanings in the Cerebral Hemispheres: Facilitation and Inhibition Effects." Perceptual and Motor Skills 96, no. 1 (2003): 166–72. http://dx.doi.org/10.2466/pms.2003.96.1.166.

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In 2002 Shibahara and Lucero-Wagoner, using a priming paradigm, reported a larger facilitation for concrete noun pairs in the right than left hemisphere when the stimulus onset asynchrony was 250 msec. Their related prime-target pairs were similar not only in meaning but also perceptual attributes, such as shape. They had reported such perceptual information to be available only in the right hemisphere early in target processing. Thus, we predicted that, when the stimulus onset asynchrony is long, there would be no effect of perceptual information on target processing in the right hemisphere,

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10

Geheb, Robert, Keith E. Whitfield, and Linda Brannon. "Effect of Visual Complexity in Identification of Tachistoscopic Images." Perceptual and Motor Skills 78, no. 3 (1994): 971–78. http://dx.doi.org/10.1177/003151259407800354.

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The present study of gender differences in hemispheric processing involved identification of tachistoscopically presented images of varying complexity. A computerized tachistoscopic program was administered to 24 men and 34 women. Time to identify contour and detailed pictures presented to the left or right cerebral hemisphere was recorded. Mean reaction time for contour pictures was significantly faster than for detailed pictures, and mean reaction time to the right hemisphere was significantly faster than that to the left hemisphere. The mean reaction time for men to identify pictures expose

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11

Hartikainen, Kaisa M. "Emotion-Attention Interaction in the Right Hemisphere." Brain Sciences 11, no. 8 (2021): 1006. http://dx.doi.org/10.3390/brainsci11081006.

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Hemispheric asymmetries in affective and cognitive functions have been extensively studied. While both cerebral hemispheres contribute to most affective and cognitive processes, neuroscientific literature and neuropsychological evidence support an overall right hemispheric dominance for emotion, attention and arousal. Emotional stimuli, especially those with survival value such as threat, tend to be prioritized in attentional resource competition. Arousing unpleasant emotional stimuli have prioritized access, especially to right-lateralized attention networks. Interference of task performance

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Cronin-Golomb, Alice. "Semantic Networks in the Divided Cerebral Hemispheres." Psychological Science 6, no. 4 (1995): 212–18. http://dx.doi.org/10.1111/j.1467-9280.1995.tb00595.x.

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Hemispheric differences in the recognition and manipulation of meaning may be based on distinctions in size, composition, or organization of the right and left semantic networks The present study describes these features of pictorially based semantic networks in 3 subjects with complete forebrain commissurotomy Stimuli were presented for prolonged viewing to the left and right visual hemifields For each trial, the subjects chose from a 20-choice array all pictures that were associated with a target, then indicated the member of each pair of chosen associates that was more closely related to th

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13

Voigt, Aiko, Bjorn Stevens, Jürgen Bader, and Thorsten Mauritsen. "The Observed Hemispheric Symmetry in Reflected Shortwave Irradiance." Journal of Climate 26, no. 2 (2013): 468–77. http://dx.doi.org/10.1175/jcli-d-12-00132.1.

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Abstract While the concentration of landmasses and atmospheric aerosols on the Northern Hemisphere suggests that the Northern Hemisphere is brighter than the Southern Hemisphere, satellite measurements of top-of-atmosphere irradiances found that both hemispheres reflect nearly the same amount of shortwave irradiance. Here, the authors document that the most precise and accurate observation, the energy balanced and filled dataset of the Clouds and the Earth’s Radiant Energy System covering the period 2000–10, measures an absolute hemispheric difference in reflected shortwave irradiance of 0.1 W

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14

Schwartz, Theodore H., Michael M. Haglund, Ettore Lettich, and George A. Ojemann. "Asymmetry of Neuronal Activity During Extracellular Microelectrode Recording from Left and Right Human Temporal Lobe Neocortex During Rhyming and Line-Matching." Journal of Cognitive Neuroscience 12, no. 5 (2000): 803–12. http://dx.doi.org/10.1162/089892900562615.

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Recordings of neuronal activity in humans have identified few correlates of the known hemispheric asymmetries of functional lateralization. Here, we examine single-unit activity recorded from both hemispheres during two delayed match-to-sample tasks that show strong hemispheric lateralization based on lesion effects; a line-matching (LM) task related to the right hemisphere, and a rhyming (RHY) task related to the left. Nineteen neuronal populations were recorded with extracellular microelectrodes from the left temporal neocortex of 11 awake patients, and 18 from the right in 9 patients during

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15

SUSANTI, SUSI. "BRAIN HEMISPHERE FUNCTION OF MALE AND FEMALE ENGLISH DEPARTMENT STUDENTS OF STKIP-MB: NEUROLINGUISTICS PERSPECTIVE." Journal Of Language Education and Development (JLed) 1, no. 1 (2018): 31–40. http://dx.doi.org/10.52060/jled.v1i1.6.

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This research identifies brain hemisphere function of male and female English department students of STKIP-MB. It identifies the dominant of brain hemisphere’s male and female students. Those dominant of brain hemisphere can be guidance to optimize both hemisphere in order to get the success life. The result found the differentiation of brain hemisphere function between male and female students: 71,4% male students dominant left hemisphere, and 28,5% dominant right hemisphere; and 71,4% female students dominant right hemisphere, and 28,5% equal left hemisphere and right hemisphere. Neurologica

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16

Lobel, Daniel S., Rex M. Swanda, and Miklos F. Losonczy. "Lateralized Visual-Field Inattention in Schizophrenia." Perceptual and Motor Skills 79, no. 1 (1994): 699–702. http://dx.doi.org/10.2466/pms.1994.79.1.699.

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Numerous studies have shown impaired verbal functioning in schizophrenic patients as compared with normals. The verbal deficits are generally attributed to damage of the left cerebral hemisphere. This attribution is based on literature which suggests that verbal processing is primarily mediated by the left hemisphere in right-handed humans. This study explored left-hemispheric integrity directly by assessing sustained attention in both the left and right hemispheres of 40 schizophrenic patients with the Weintraub Cancellation Tasks. Patients made significantly more errors of omission on the ri

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Liu, He, Yezhong Tang, Yanxia Ni, and Guangzhan Fang. "Laterality in Responses to Acoustic Stimuli in Giant Pandas." Animals 11, no. 3 (2021): 774. http://dx.doi.org/10.3390/ani11030774.

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Cerebral lateralization is a common feature present in many vertebrates and is often observed in response to various sensory stimuli. Numerous studies have proposed that some vertebrate species have a right hemisphere or left hemisphere dominance in response to specific types of acoustic stimuli. We investigated lateralization of eight giant pandas (Ailuropoda melanoleuca) by using a head turning paradigm and twenty-eight acoustic stimuli with different emotional valences which included twenty-four conspecific and four non-conspecific acoustic stimuli (white noise, thunder, and vocalization of

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Mangun, G. R., S. J. Luck, R. Plager, et al. "Monitoring the Visual World: Hemispheric Asymmetries and Subcortical Processes in Attention." Journal of Cognitive Neuroscience 6, no. 3 (1994): 267–75. http://dx.doi.org/10.1162/jocn.1994.6.3.267.

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Hemispheric specialization and subcortical processes in visual anention were investigated in callosotomy (split-brain) patients by measuring reaction times to lateralized stimuli in a spatial cuing paradigm. Cuing effects were obtained for targets presented to the right hemisphere (left visual hemifield) but not for those presented to the left hemisphere. These cuing effects were manifest as faster reaction times when the cue correctly indicated the location of the subsequent target (valid trials), as compared to trials in which the cue and target appeared in opposite hemifields (invalid trial

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Metcalfe, Janet, Margaret Funnell, and Michael S. Gazzaniga. "Right-Hemisphere Memory Superiority: Studies of a Split-Brain Patient." Psychological Science 6, no. 3 (1995): 157–64. http://dx.doi.org/10.1111/j.1467-9280.1995.tb00325.x.

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Six experiments explored hemispheric memory differences in a patient who had undergone complete corpus callosum resection The right hemisphere was better able than the left to reject new events similar to originally presented materials of several types, including abstract visual forms, faces, and categorized lists of words Although the left hemisphere is capable of mental manipulation, imagination, semantic priming, and complex language production, these functions are apparently linked to memory confusions—confusions less apparent in the more literal right hemisphere Differences between the le

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Aparicio, A. J. P., V. M. S. Carrasco, M. C. Gallego, and J. M. Vaquero. "Hemispheric Sunspot Number from the Madrid Astronomical Observatory for the Period 1935–1986." Astrophysical Journal 931, no. 1 (2022): 52. http://dx.doi.org/10.3847/1538-4357/ac5dc6.

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Abstract Long-term studies on hemispheric asymmetry can help to understand better the solar dynamo. We present the hemispheric sunspot number calculated from daily sunspot observations made at the Madrid Astronomical Observatory for the period 1935–1986 (corresponding approximately to Solar Cycles 17–21). From this data set, we also analyzed the asymmetry index and hemispheric phase shifts. We conclude that the northern hemisphere was predominant in Solar Cycles 17–20, whereas the southern hemisphere was predominant in Solar cycle 21. The strongest asymmetries are found in Solar Cycles 20 (wit

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Wang, Bin, Qionghui Zhan, Ting Yan, et al. "Hemisphere and Gender Differences in the Rich-Club Organization of Structural Networks." Cerebral Cortex 29, no. 11 (2019): 4889–901. http://dx.doi.org/10.1093/cercor/bhz027.

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AbstractStructural and functional differences in brain hemispheric asymmetry have been well documented between female and male adults. However, potential differences in the connectivity patterns of the rich-club organization of hemispheric structural networks in females and males remain to be determined. In this study, diffusion tensor imaging was used to construct hemispheric structural networks in healthy subjects, and graph theoretical analysis approaches were applied to quantify hemisphere and gender differences in rich-club organization. The results showed that rich-club organization was

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Baybakov, S. E., N. S. Bakhareva, S. V. Chigrin, et al. "Hemispheric Asymmetry Gender Differences in Preadolescent Children." Innovative Medicine of Kuban, no. 1 (March 6, 2023): 53–57. http://dx.doi.org/10.35401/2541-9897-2023-26-1-53-57.

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Background: Investigating various postnatal parameters of cerebral hemispheres is of great practical value.Objective: To study gender differences in hemispheric parameters and interhemispheric interactions in preadolescent children.Materials and methods: The retrospective study assessed archived brain magnetic resonance images of 60 eight-year-old boys and 60 eight-year-old girls. The analyzed parameters were as follows: 1) hemispheric length; 2) hemispheric width; 3) hemispheric height; 4) width-longitudinal index of a hemisphere; 5) altitude-longitudinal index of a hemisphere; 6) length of f

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van Orden, Karl F., and John F. House. "Spatial Frequency-Dependent Asymmetry of Visual Evoked Potential Amplitudes." Perceptual and Motor Skills 82, no. 3 (1996): 1011–18. http://dx.doi.org/10.2466/pms.1996.82.3.1011.

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The extent to which pattern reversal evoked potential amplitudes are distributed symmetrically over the scalp was investigated as a function of stimulus spatial frequency. Nine right-handed male subjects viewed sinusoidal grating stimuli of 4.0 and 0.5 c/deg phase reversed every 900 msec. A visual half-field configuration enabled selective stimulation of the right- or left-hemisphere visual cortex. Evoked responses were recorded from the 2 cm above the inion (Oz) and at 7 and 13 cm lateral to Oz. Analyses of normalized evoked response amplitudes showed a significant asymmetry for the 4.0 c/deg

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Trushina, D. A., O. A. Vedyasova, and M. A. Paramonova. "SPATIAL PICTURE OF DISTRIBUTION OF ELECTROENCEPHALOGRAM RHYTHMS IN THE RIGHT-HANDED STUDENTS DURING AN EXAM." Vestnik of Samara University. Natural Science Series 20, no. 3 (2017): 202–12. http://dx.doi.org/10.18287/2541-7525-2014-20-3-202-212.

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Registration of electroencephalogram (EEG) in the right-handed students during an exam revealed weakening of alpha rhythm in all areas of right and left cerebral hemispheres as well as increased beta rhythm in parietal and end-lobes of the right hemisphere. Simultaneously regular delta waves in the frontal leads ofboth hemispheres and theta waves in right frontal, occipitalis and temporal leads were marked. Oﬀset of EEG slow wave activity in the right hemisphere in partial right-handers was marked in more noticeable way than in that of the true right-handers. The obtained data suggest that the

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Nicholls, Michael E. R. "Hemispheric Asymmetries for Temporal Resolution: A Signal Detection Analysis of Threshold and Bias." Quarterly Journal of Experimental Psychology Section A 47, no. 2 (1994): 291–310. http://dx.doi.org/10.1080/14640749408401113.

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Divided visual field techniques were used to investigate hemispheric asymmetries for (a) the threshold of fusion of two flashes of light and (b) the detection of simultaneous versus successive events for a group of normal, right-handed adults. A signal detection analysis revealed a higher level of accuracy for the right visual field-left hemisphere (RVF-LH) relative to the left visual field-right hemisphere (LVF-RH) for both tasks. These results were interpreted in terms of a general left-hemisphere advantage for the discrimination of fine temporal events. The implications of these results for

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Gainotti, Guido. "Why Are the Right and Left Hemisphere Conceptual Representations Different?" Behavioural Neurology 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/603134.

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The present survey develops a previous position paper, in which I suggested that the multimodal semantic impairment observed in advanced stages of semantic dementia is due to the joint disruption of pictorial and verbal representations, subtended by the right and left anterior temporal lobes, rather than to the loss of a unitary, amodal semantic system. The main goals of the present review are (a) to survey a larger set of data, in order to confirm the differences in conceptual representations at the level of the right and left hemispheres, (b) to examine if language-mediated information plays

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Veldema, Jitka, Dennis Alexander Nowak, Kathrin Bösl, and Alireza Gharabaghi. "Hemispheric Differences of 1 Hz rTMS over Motor and Premotor Cortex in Modulation of Neural Processing and Hand Function." Brain Sciences 13, no. 5 (2023): 752. http://dx.doi.org/10.3390/brainsci13050752.

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Introduction: Non-invasive brain stimulation can modulate both neural processing and behavioral performance. Its effects may be influenced by the stimulated area and hemisphere. In this study (EC no. 09083), repetitive transcranial magnetic stimulation (rTMS) was applied to the primary motor cortex (M1) or dorsal premotor cortex (dPMC) of either the right or left hemisphere, while evaluating cortical neurophysiology and hand function. Methods: Fifteen healthy subjects participated in this placebo-controlled crossover study. Four sessions of real 1 Hz rTMS (110% of rMT, 900 pulses) over (i) lef

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Wijaya, Evan. "Game Utilization as a Media to Train the Balance of Left and Right Brain." SISFORMA 4, no. 1 (2017): 12. http://dx.doi.org/10.24167/sisforma.v4i1.1042.

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Human have two brain hemispheres, left hemisphere and right hemisphere. Left hemisphere is used for processing language, words, numbers, equations, etc. Right hemisphere is used for processing creativity, imagination, music, color, etc. Every human should have balance between left and right hemisphere. One method that could be used for balancing brain hemispheres is to use left and right hands for using tools, writing, or typing. “Typing Rhythm” is a game for PC platform, the purpose of this game is for brain balancing exercise by typing lyric of a song while the song is played.

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Doty, Robert. "Unity from duality." Acta Neurobiologiae Experimentalis 63, no. 3 (2003): 163–70. http://dx.doi.org/10.55782/ane-2003-1464.

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When, in the primeval sea, creatures first began to crawl, "right" and "left" came into being, yielding neuronal nets to control response to the sidedness of stimuli. In the half billion years of moving and sensing, two brains have evolved, the right and the left; and human experience now shows them to be roughly equivalent, potentially independent, conscious entities. This dramatic fact is evidenced by "split-brain" patients and by numerous cases of therapeutic removal of either hemisphere. Equally dramatic, of course, is that there is not the slightest sign of this duality in everyday experi

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METUKI, NILI, SHANI SINKEVICH, and MICHAL LAVIDOR. "Lateralization of semantic processing is shaped by exposure to specific mother tongues: The case of insight problem solving by bilingual and monolingual native Hebrew speakers." Bilingualism: Language and Cognition 16, no. 4 (2013): 900–913. http://dx.doi.org/10.1017/s1366728913000023.

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Solving insight problems is a complex task found to involve coarse semantic processing in the right hemisphere when tested in English. In Hebrew, the left hemisphere (LH) may be more active in this task, due to the inter-hemispheric interaction between semantic, phonological and orthographic processing. In two Hebrew insight problems experiments, we revealed a performance advantage in the LH, in contrast to the patterns previously observed in English. A third experiment, conducted in English with early Hebrew–English bilinguals, confirmed that the LH advantage found with Hebrew speakers does n

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Trach, О. О., D. M. Shyian, and D. I. Marakushin. "Individual variability of the brain hemispheres’ and occipital lobes’ width." Medicine Today and Tomorrow 88, no. 3 (2020): 4–11. http://dx.doi.org/10.35339/msz.2020.88.03.01.

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200 hemispheres of the brain of people who died from diseases not related to brain pathology were studied. Morphometric method was used and statistical analysis was completed. It was found out that the width of the right and left hemispheres of the brain in both men and women of brachycranial skull type is slightly greater than of mesocranial and dolichocranial ones. Men and women with dolichocranial skull type have the width of the left hemisphere greater than the right one. Men have the width of the left and right hemispheres greater than women. The limits of individual variability of brain

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Lagoudakis, Nektarios, Filippos Vlachos, Vasilia Christidou, Denis Vavougios, and Marianthi Batsila. "The Role of Hemispheric Preference in Student Misconceptions in Biology." European Journal of Educational Research 12, no. 2 (2023): 739–47. http://dx.doi.org/10.12973/eu-jer.12.2.739.

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<p style="text-align: justify;">The various intuitive reasoning types in many cases comprise the core of students’ misconceptions about concepts, procedures and phenomena that pertain to natural sciences. Some researchers support the existence of a relatively closer connection between the right hemisphere and intuitive thought, mainly due to a notably closer relation of individual intuitive cognitive processes with specific right hemisphere regions. It has been suggested that individuals show a different preference in making use of each hemisphere’s cognitive capacity, a tendency which h

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Sakreida, Katrin, Johanna Blume-Schnitzler, Grit Frankemölle, et al. "Hemispheric Dominance for Language and Side Effects in Mapping the Inferior Frontal Junction Area with Transcranial Magnetic Stimulation." Journal of Neurological Surgery Part A: Central European Neurosurgery 81, no. 02 (2020): 130–37. http://dx.doi.org/10.1055/s-0040-1701236.

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Abstract Background and Study Aims Language mapping by navigated transcranial magnetic stimulation (TMS) is commonly applied over the left language-dominant hemisphere to indicate the language-related cortex. Detailed language mapping of Broca's region including stimulation targets in the immediate vicinity to the premotor cortex may raise concern about confounding unspecific motor effects. We performed interhemispheric comparisons to delineate such possible unspecific effects from true TMS-induced language inhibition. Material and Methods Fifteen healthy German speakers named object pictures

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Molchanova, Zhanna Ivanovna, Evgeniya Alekseevna Zakharova, and Garatel Mubariz kyzy Kulieva. "TESTING OF NEUROPSYCHOLOGICAL STATUS IN POST-STROKE PATIENTS WITH DIFFERENT LOCALIZATION OF THE HEMISPHERIC FOCUS." Scientific medical Bulletin of Ugra 36, no. 2 (2023): 96–98. http://dx.doi.org/10.25017/2306-1367-2023-36-2-96-98.

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32 patients in the early recovery period of ischemic stroke in the right and left hemispheres of the brain were examined in order to assess the level and characteristics of cognitive functions and anxiety-depressive disorders for planning personalized rehabilitation treatment. Pre-dementia was detected in 42.1% of patients according to the results of the Short Mental Status Assessment Scale (MMSE), which is more common in patients with left-hemisphere stroke. Clinical depression, as well as subclinical and clinical anxiety are detected more often in left-hemisphere stroke. The inverse correlat

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Virtanen, I. O. I., I. I. Virtanen, A. A. Pevtsov, and K. Mursula. "Reconstructing solar magnetic fields from historical observations." Astronomy & Astrophysics 616 (August 2018): A134. http://dx.doi.org/10.1051/0004-6361/201732323.

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Aims. Sunspot activity is often hemispherically asymmetric, and during the Maunder minimum, activity was almost completely limited to one hemisphere. In this work, we use surface flux simulation to study how magnetic activity limited only to the southern hemisphere affects the long-term evolution of the photospheric magnetic field in both hemispheres. The key question is whether sunspot activity in one hemisphere is enough to reverse the polarity of polar fields in both hemispheres. Methods. We simulated the evolution of the photospheric magnetic field from 1978 to 2016 using the observed acti

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Djukic-Macut, Natasa, Slobodan Malobabic, Natalija Stefanovic, et al. "Asymmetries in numerical density of pyramidal neurons in the fifth layer of the human posterior parietal cortex." Vojnosanitetski pregled 69, no. 8 (2012): 681–85. http://dx.doi.org/10.2298/vsp101126016d.

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Background/Aim. Both superior parietal lobule (SPL) of dorsolateral hemispheric surface and precuneus (PEC) of medial surface are the parts of posterior parietal cortex. The aim of this study was to determine the numerical density (NV) of pyramidal neurons in the layer V of SPL and PEC and their potential differences. Methods. From 20 (40 hemispheres) formaline fixed human brains (both sexes; 27- 65 years) tissue blocks from SPL and PEC from the left and right hemisphere were used. According to their size the brains were divided into two groups, the group I with the larger left (15 brains) and

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Slotnick, Scott D., Lauren R. Moo, Mark A. Tesoro, and John Hart. "Hemispheric Asymmetry in Categorical Versus Coordinate Visuospatial Processing Revealed by Temporary Cortical Deactivation." Journal of Cognitive Neuroscience 13, no. 8 (2001): 1088–96. http://dx.doi.org/10.1162/089892901753294383.

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Kosslyn (1987) proposed that the left hemisphere is better than the right hemisphere at categorical visuospatial processing while the right hemisphere is better than the left hemisphere at coordinate visuospatial processing. In 134 patients, one hemisphere (and then usually the other) was temporarily deactivated by intracarotid injection of sodium amobarbital. After a hemisphere was deactivated, a cognitive test battery was conducted, which included categorical and coordinate visuospatial tasks. Using this technique, the processing capabilities of the intact hemisphere could be determined, thu

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Casey, Cameron P., Ellen N. Sutter, Alina Grimaldo, et al. "Preservation of Bilateral Corticospinal Projections from Injured Hemisphere After Perinatal Stroke." Brain Sciences 15, no. 1 (2025): 82. https://doi.org/10.3390/brainsci15010082.

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Background: Perinatal brain injury is a leading cause of developmental disabilities, including cerebral palsy. However, further work is needed to understand early brain development in the presence of brain injury. In this case report, we examine the longitudinal neuromotor development of a term infant following a significant loss of right-hemispheric brain tissue due to a unilateral ischemic stroke. Our analysis focuses on the integrity and development of the corticospinal tract (CST) from the lesioned hemisphere. This case provides a unique opportunity to evaluate CST development after loss o

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Steckler, Conor M., J. Kiley Hamlin, Michael B. Miller, Danielle King, and Alan Kingstone. "Moral judgement by the disconnected left and right cerebral hemispheres: a split-brain investigation." Royal Society Open Science 4, no. 7 (2017): 170172. http://dx.doi.org/10.1098/rsos.170172.

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Owing to the hemispheric isolation resulting from a severed corpus callosum, research on split-brain patients can help elucidate the brain regions necessary and sufficient for moral judgement. Notably, typically developing adults heavily weight the intentions underlying others' moral actions, placing greater importance on valenced intentions versus outcomes when assigning praise and blame. Prioritization of intent in moral judgements may depend on neural activity in the right hemisphere's temporoparietal junction, an area implicated in reasoning about mental states. To date, split-brain resear

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Shibahara, Ichiyo, Yoko Tanihata, Kazuko Fujitani, Hajime Handa, and Toshihiro Kumabe. "NIMG-61. RADIOLOGICAL, CLINICAL, AND MOLECULAR ANALYSES UNRAVEL DISTINCT SUBTYPES OF ADULT GRADE 4 BUTTERFLY GLIOMAS AFFECTING THE PROGNOSIS." Neuro-Oncology 25, Supplement_5 (2023): v199—v200. http://dx.doi.org/10.1093/neuonc/noad179.0757.

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Abstract Gliomas located at the corpus callosum (CC) and invading the bilateral hemispheres is known as butterfly gliomas (bG). Images of bG are frequently used as the hallmark of glioblastoma (GB); however, the molecular background and origins of bG remain unknown. We collected 37 bG patients, including 32 cases of GB and 5 cases of astrocytoma, WHO grade 4, IDH-mutant. Our dataset included extremely rare sequential radiological imaging before receiving a definitive diagnosis of bG. One case emerged from CC and subsequently became bG, whereas five cases emerged from the cerebral hemisphere an

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Yarosh, Oleg Aleksandrovich. "The role of neurotransmitter systems separate the hemispheres of the brain in action the new antiepileptic compounds AGB-31." Reviews on Clinical Pharmacology and Drug Therapy 11, no. 2 (2013): 31–35. http://dx.doi.org/10.17816/rcf11231-35.

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Compound AGB-31, a monocarbamate derivative, is shown to possess a high antiepileptic activity. The mechanisms of antiepileptic action are connected with significant increase in glutamic acid decarboxylase activity in the left hemisphere of the brain, with trend of the glutamate content decrease in the left hemisphere and the tendency to increase GABA in both hemispheres. AGB-31 significantly (more than 3-fold) increases syntase nitric oxide activity in the left hemisphere and has a tendency to reduce the NO content in both hemispheres. AGB-31 significantly (by 63.4%), reduced glutathione pero

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Jordan, Timothy R., Michelle Redwood, and Geoffrey R. Patching. "Effects of Form Familiarity on Perception of Words, Pseudowords, and Nonwords in the Two Cerebral Hemispheres." Journal of Cognitive Neuroscience 15, no. 4 (2003): 537–48. http://dx.doi.org/10.1162/089892903321662921.

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Previous investigations of hemispheric processes of word perception provide a mixed picture of the sensitivity of each hemisphere to the familiarity of the visual form of lateralized displays. We investigated this issue by presenting words, pseudowords, and nonwords briefly to either the left (LH) or right (RH) hemisphere in lowercase, uppercase, and a matched, unfamiliar mixed-case form, and used an eye tracker to ensure central fixation and the Reicher–Wheeler task to suppress influences of stimulus asymmetry. Familiarity of form exerted a substantial effect on perception. In particular, per

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Van Kaam, Ruud C., Michel J. A. M. van Putten, Sarah E. Vermeer, and Jeannette Hofmeijer. "Contralesional Brain Activity in Acute Ischemic Stroke." Cerebrovascular Diseases 45, no. 1-2 (2018): 85–92. http://dx.doi.org/10.1159/000486535.

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Background: The noninjured, contralateral hemisphere is increasingly acknowledged in the process of recovery from acute ischemic stroke. We estimated the value of conventional electroencephalography (EEG) recordings for identifying contralateral hemisphere involvement in relation to functional recovery. Methods: We analyzed 2-min epochs from 21 electrode EEG registrations of 18 patients with acute hemispheric ischemic stroke and compared with 18 age-matched controls. Outcome was dichotomized as good (modified Rankin Scale [mRS] 0–2) or poor (mRS 3–5 or death) at 3 months. Effects of the infarc

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Fedorov, Valery, and Denis Frolov. "Change in Earth’s solar climate over the period from 1900 to 2100." Solar-Terrestrial Physics 11, no. 2 (2025): 12–18. https://doi.org/10.12737/stp-112202502.

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The paper presents the results of the analysis of changes in Earth’s solar climate over the period from 1900 to 2100. It has been determined that the annual meridional gradient of irradiation intensity from 1900 to 2100 and latitudinal differences in the Earth irradiation intensity increase. A relative increase in winter irradiation intensity for the hemispheres is observed in the regions where extratropical cyclones develop, which may contribute to the activation of cyclonic processes in the atmosphere in the winter half-year. In the Northern Hemisphere, seasonal differences in the irradiatio

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Reuter-Lorenz, Patricia A., and Kathleen Baynes. "Modes of Lexical Access in the Callosotomized Brain." Journal of Cognitive Neuroscience 4, no. 2 (1992): 155–64. http://dx.doi.org/10.1162/jocn.1992.4.2.155.

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Left hemisphere processing is typically characterized as analytic and serial whereas the right hemisphere is characterized as wholistic and parallel. Word recognition may be an exception to this dichotomy if the letter-by-letter alexia produced by left hemisphere damage reflects the reading abilities of the right hemisphere. We investigated this possibility by studying prelexical and lexical processes in the separated hemispheres of callosotomy patient J. W. A word superiority effect demonstrated in each visual field suggests that both hemispheres have access to a visual lexicon. Error pattern

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Rastatter, Michael P., and Andrew Stuart. "Hemispheric Picture-Naming Hierarchies in Stuttering Subjects." Perceptual and Motor Skills 81, no. 3 (1995): 899–908. http://dx.doi.org/10.2466/pms.1995.81.3.899.

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The present study was done to investigate the linguistic organization of the right hemisphere of stuttering subjects and the interhemispheric interactions that underlie verbal output in this population. Naming reaction times of 14 stuttering adults were measured to unilaterally presented pictures corresponding to vocabulary levels of <5.5, 9.5–10.5, and > 18.0 years of age. An analysis of variance of latencies showed a significant main effect for picture vocabulary-age. Post hoc tests were interpreted as suggesting that the right hemisphere of stuttering subjects was capable of different

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Collinson, Simon L., Clare E. Mackay, Anthony C. James, et al. "Brain volume, asymmetry and intellectual impairment in relation to sex in early-onset schizophrenia." British Journal of Psychiatry 183, no. 2 (2003): 114–20. http://dx.doi.org/10.1192/bjp.183.2.114.

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BackgroundAccumulating evidence suggests that early-onset schizophrenia arises from a disturbance in the normal trajectory of cerebral development.AimsTo investigate brain structure, asymmetry and IQ in early-onset schizophrenia.MethodVolumes of left and right cerebral hemispheres and IQ were assessed in 33 participants with early-onset DSM – IV schizophrenia and 30 members of a matched, normal control group.ResultsTotal brain volume was significantly smaller in the group with early-onset disease (‘cases’) relative to the control group (4.5%), especially for the left hemisphere in males (6.0%)

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Collin, C., and F. Lolas. "Hemispheric contribution to vertex augmentation/reduction of the auditory evoked potential." Arquivos de Neuro-Psiquiatria 43, no. 4 (1985): 347–54. http://dx.doi.org/10.1590/s0004-282x1985000400002.

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Starting off from the notion that the cerebral hemispheres differ in their processing mode, this paper reports on stimulus intensity modulation of auditory evoked potentials recorded from hemispheric leads (C3 and C4 referenced to ipsilateral mastoid processes) in a sample of 40 male Ss between 18 to 40 years of age. The experimental set up involved the recording of series of 100 trials to binaural clicks of 63.5, 74.6 and 85dB AL. Ss who were augmenters at the vertex showed positive Amplitude-Intensity function slopes over the left hemisphere; when Ss were Reducers at the vertex, the slopes w

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Piazza, Elise A., and Michael A. Silver. "Persistent Hemispheric Differences in the Perceptual Selection of Spatial Frequencies." Journal of Cognitive Neuroscience 26, no. 9 (2014): 2021–27. http://dx.doi.org/10.1162/jocn_a_00606.

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Previous research has shown that the right hemisphere processes low spatial frequencies more efficiently than the left hemisphere, which preferentially processes high spatial frequencies. These studies have typically measured RTs to single, briefly flashed gratings and/or have directed observers to attend to a particular spatial frequency immediately before making a judgment about a subsequently presented stimulus. Thus, it is unclear whether the hemispheres differ in perceptual selection from multiple spatial frequencies that are simultaneously present in the environment, without bias from se

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Deng, L. H., Y. Fei, H. Deng, Y. Mei, and F. Wang. "Spatial distribution of quasi-biennial oscillations in high-latitude solar activity." Monthly Notices of the Royal Astronomical Society 494, no. 4 (2020): 4930–38. http://dx.doi.org/10.1093/mnras/staa1061.

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ABSTRACT Quasi-biennial oscillations (QBOs) are considered to be a fundamental mode of solar magnetic activity at low latitudes (≤50°). However, the evolutionary aspect and the hemispheric distribution of solar QBOs at high latitudes (≥60°) are rarely studied. Here, we apply a relatively novel time-frequency analysis technique, called the synchrosqueezed wavelet transform, in order to extract the main components of the polar faculae in the Northern and Southern hemispheres for the time interval from 1951 August to 1998 December. We note the following. (i) Apart from the 22-yr Hale cycle, the 1

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