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Double dissociation of V1 and V5/MT activity in visual awareness

Silvanto, J; Lavie, N; Walsh, V; (2005) Double dissociation of V1 and V5/MT activity in visual awareness. CEREB CORTEX , 15 (11) 1736 - 1741. 10.1093/cercor/bhi050. Green open access

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Abstract

The critical time windows of the contribution of V1 and V5/MT to visual awareness of moving visual stimuli were compared by administering transcranial magnetic stimulation (TMS) to V1 or V5/MT in various time intervals from stimulus offset during performance of a simple motion detection task. Our results show a double dissociation in which the critical period of V1 both predates and postdates that of V5/MT, and where stimulation of either V1 at V5/MT's critical period or V5/MT at V1's critical period does not impair performance. These findings demonstrate the importance of back-projections from V5/MT to V1 in awareness of real motion stimuli.

Type: Article
Title: Double dissociation of V1 and V5/MT activity in visual awareness
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/cercor/bhi050
Keywords: awareness, back-projections, motion detection, transcranial magnetic stimulation, V1, V5/MT, TRANSCRANIAL MAGNETIC STIMULATION, OCCIPITAL CORTEX, MACAQUE MONKEY, PERCEPTION, MOTION, AREA, DIRECTION, CONNECTIONS, FEEDBACK, SELECTIVITY
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/3226
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