Skip to Main content Skip to Navigation

Interhemispheric transfer time asymmetry of visual information depends on eye dominance: an electrophysiological study

Abstract : The interhemispheric transfer of information is a fundamental process in the human brain. When a visual stimulus appears eccentrically in one visual-hemifield, it will first activate the contralateral hemisphere but also the ipsilateral one with a slight delay due to the interhemispheric transfer. This interhemispheric transfer of visual information is believed to be faster from the right to the left hemisphere in right-handers. Such an asymmetry is considered as a relevant fact in the context of the lateralization of the human brain. We show here using current source density (CSD) analyses of visually evoked potential (VEP) that, in right-handers and, to a lesser extent in left-handers, this asymmetry is in fact dependent on the sighting eye dominance, the tendency we have to prefer one eye for monocular tasks. Indeed, in right-handers, a faster interhemispheric transfer of visual information from the right to left hemisphere was observed only in participants with a right dominant eye (DE). Right-handers with a left DE showed the opposite pattern, with a faster transfer from the left to the right hemisphere. In left-handers, albeit a smaller number of participants has been tested and hence confirmation is required, only those with a right DE showed an asymmetrical interhemispheric transfer with a faster transfer from the right to the left hemisphere. As a whole these results demonstrate that eye dominance is a fundamental determinant of asymmetries in interhemispheric transfer of visual information and suggest that it is an important factor of brain lateralization.
Document type :
Journal articles
Complete list of metadatas

Cited literature [80 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01763569
Contributor : Jean Blouin <>
Submitted on : Wednesday, April 11, 2018 - 11:45:18 AM
Last modification on : Thursday, April 12, 2018 - 3:29:45 PM

File

fnins-12-00072.pdf
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Romain Chaumillon, Jean Blouin, Alain Guillaume. Interhemispheric transfer time asymmetry of visual information depends on eye dominance: an electrophysiological study. Frontiers in Neuroscience, Frontiers, 2018, 12, pp.72 - 72. ⟨10.3389/fnins.2018.00072⟩. ⟨hal-01763569⟩

Share

Metrics

Record views

181

Files downloads

249