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Titolo:
Electrophysiological evidence for fast visual processing through the humankoniocellular pathway when stimuli move
Autore:
Morand, S; Thut, G; de Peralta, RG; Clarke, S; Khateb, A; Landis, T; Michel, CM;
Indirizzi:
Univ Hosp Geneva, Dept Neurol, Funct Brain Mapping Lab, CH-1211 Geneva 14,Switzerland Univ Hosp Geneva Geneva Switzerland 14 ab, CH-1211 Geneva 14,Switzerland Univ Geneva, Plurifac Program Cognit Neurosci, CH-1211 Geneva, SwitzerlandUniv Geneva Geneva Switzerland CH-1211 osci, CH-1211 Geneva, Switzerland Univ Lausanne, CHUV, Div Neuropsychol, CH-1015 Lausanne, Switzerland Univ Lausanne Lausanne Switzerland CH-1015 CH-1015 Lausanne, Switzerland
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 8, volume: 10, anno: 2000,
pagine: 817 - 825
SICI:
1047-3211(200008)10:8<817:EEFFVP>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL GENICULATE-NUCLEUS; TRANSCRANIAL MAGNETIC STIMULATION; MARMOSET CALLITHRIX-JACCHUS; RETINAL GANGLION-CELLS; MIDDLE TEMPORAL AREA; NEW-WORLD MONKEY; MACAQUE MONKEY; SPECTRAL SENSITIVITY; CHROMATIC PROPERTIES; PHYSIOLOGICAL-BASIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
98
Recensione:
Indirizzi per estratti:
Indirizzo: Michel, CM Univ Hosp Geneva, Dept Neurol, Funct Brain Mapping Lab, 24 Rue Micheli du Crest, CH-1211 Geneva 14, Switzerland Univ Hosp Geneva 24 Rue Micheli du Crest Geneva Switzerland 14
Citazione:
S. Morand et al., "Electrophysiological evidence for fast visual processing through the humankoniocellular pathway when stimuli move", CEREB CORT, 10(8), 2000, pp. 817-825

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 bythe third retinogeniculocortical pathway - the so-called koniocellular (K)pathway. We addressed this issue in humans by studying the spatio-temporaldynamics 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: anearly period between 40 and 75 ms after stimulus onset, and a later periodbetween 175 and 240 ms. Some of these fields were identical for tritan- and 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/08/20 alle ore 04:59:25