Electrophysiological evidence for fast visual processing through the human koniocellular pathway when stimuli move.

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Serval ID
serval:BIB_15183
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Electrophysiological evidence for fast visual processing through the human koniocellular pathway when stimuli move.
Journal
Cerebral Cortex
Author(s)
Morand S., Thut G., de Peralta R.G., Clarke S., Khateb A., Landis T., Michel C.M.
ISSN
1047-3211
Publication state
Published
Issued date
2000
Peer-reviewed
Oui
Volume
10
Number
8
Pages
817-825
Language
english
Abstract
There is increasing evidence from cellular recordings in primates and behavioral studies in humans that motion can be processed by other than the magnocellular (M) pathway and the cortical dorsal stream. Little is known about cortical processing of moving stimuli when the information is conveyed by the third retinogeniculocortical pathway - the so-called koniocellular (K) pathway. We addressed this issue in humans by studying the spatio-temporal dynamics of the brain electrical fields evoked by tritan (S-cone isolating) and luminance-defined moving stimuli. Tritan and luminance stimuli are presumably carried by the K and M pathways respectively. We found two time intervals where significant stimulus-specific electric fields were evoked: an early period between 40 and 75 ms after stimulus onset, and a later period between 175 and 240 ms. Some of these fields were identical for tritanand luminance-motion, suggesting that the processing of moving stimuli share common cortical substrates when mediated via K and M pathway input. However, tritan-motion stimuli also evoked unique electric fields that appeared earlier in time than the common motion-specific fields, indicating very fast activation of cortical areas specific to input through the K pathway. A distributed source localization procedure revealed simultaneous activation of striate and extrastriate areas even at the early processing stages, strongly suggesting a very fast activation of the visual cerebral network.
Keywords
Adult, Brain Mapping, Color Perception, Electroencephalography, Evoked Potentials, Visual, Female, Humans, Male, Motion Perception, Photic Stimulation, Reaction Time, Visual Pathways
Pubmed
Web of science
Open Access
Yes
Create date
19/11/2007 12:07
Last modification date
25/09/2019 6:08
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