Asymmetry in visual information processing depends on the strength of eye dominance

Autor: Patrice Senot, Dorine Vergilino-Perez, Romain Chaumillon, Jean Blouin, Nadia Alahyane, Judith Vergne, Karine Doré-Mazars, Alain Guillaume, Christelle Lemoine-Lardennois
Přispěvatelé: Laboratoire de Neurosciences Cognitives [Marseille] (LNC), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Psychologie et Neuropsychologie Cognitives (LPNCog FRE 3292), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Vision Action Cognition (VAC - EA 7326), Université Paris Descartes - Paris 5 (UPD5), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Aix Marseille Université (AMU) - Centre National de la Recherche Scientifique (CNRS), Laboratoire de Psychologie et Neuropsychologie Cognitives (LPNCog), Université Paris Descartes - Paris 5 (UPD5) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Centre National de la Recherche Scientifique (CNRS), Ministère de l'Éducation nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Descartes - Paris 5 (UPD5)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Adult
Male
medicine.medical_specialty
Eye Movements
genetic structures
somatosensory cortex
Cognitive Neuroscience
Experimental and Cognitive Psychology
functional neuroimaging
Stimulus (physiology)
Audiology
Somatosensory system
Lateralization of brain function
Ocular dominance
Developmental psychology
Young Adult
03 medical and health sciences
Behavioral Neuroscience
0302 clinical medicine
somatosensory processing
Reaction Time
medicine
Humans
Prefrontal cortex
Analysis of Variance
prefrontal cortex
Monocular
fMRI
[SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences
eye diseases
Saccadic masking
Dominance
Ocular
Saccade
Visual Perception
030221 ophthalmology & optometry
Female
sense organs
Psychology
Photic Stimulation
030217 neurology & neurosurgery
[SDV.NEU.SC] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences
Zdroj: Neuropsychologia
Neuropsychologia, 2017, 96, pp.126-136. ⟨10.1016/j.neuropsychologia.2017.01.015⟩
Neuropsychologia, Elsevier, 2017, 96, pp.126-136. ⟨10.1016/j.neuropsychologia.2017.01.015⟩
Neuropsychologia, Elsevier, 2017, 96, pp.126-136. 〈10.1016/j.neuropsychologia.2017.01.015〉
ISSN: 0028-3932
1873-3514
DOI: 10.1016/j.neuropsychologia.2017.01.015⟩
Popis: International audience; Electrophysiological studies have shown that task-relevantsomatosensory information leads to selective facilitationwithin the primary somatosensory cortex (SI).The purpose of the present study was (1) to further explorethe relationship between the relevancy of stimuliand activation within the contralateral and ipsilateralSI and (2) to provide further insight into the specificsensory gating network responsible for modulating neuralactivity within SI. Functional MRI of 12 normal subjectswas performed with vibrotactile stimuli presentedto the pad of the index finger. In experiment 1, the stimuluswas presented to either the left or the right hand.Subjects were required to detect transient changes instimulus frequency. In experiment 2, stimuli were presentedto either the right hand alone or both handssimultaneously. Stimuli were applied either (A) passivelyor (B) when subjects were asked to detect frequencychanges that occurred to the right hand only. Inexperiment 1, task-relevant somatosensory stimulationled not only to enhanced contralateral SI activity, butalso to a suppression of activity in the ipsilateral SI. Inexperiment 2, SI activation was enhanced when stimuliwere task-relevant, compared to that observed with passiveinput. When stimuli were presented simultaneouslyto both hands, only those that were task-relevant increasedSI activation. This was associated with recruitmentof a network of cortical regions, including the rightprefrontal cortex (Brodmann area 9). We conclude thatSI modulation is dependent on task relevancy and thatthis modulation may be regulated, at least in part, by theprefrontal cortex.
Databáze: OpenAIRE
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