Many neurons in the monkey visual extrastriate cortex have receptive fields that are affected by gaze direction. In humans, psychophysical studies suggest that motion signals may be encoded in a spatiotopic fashion. Here we use functional magnetic resonance imaging to study spatial selectivity in the human middle temporal cortex ( area MT or V5), an area that is clearly implicated in motion perception. The results show that the response of MT is modulated by gaze direction, generating a spatial selectivity based on screen rather than retinal coordinates. This area could be the neurophysiological substrate of the spatiotopic representation of motion signals.
|Autori:||d'Avossa G; Tosetti M; Crespi S; Biagi L; Burr DC; Morrone M.C.|
|Titolo:||Spatiotopic selectivity of BOLD responses to visual motion in human area MT|
|Anno del prodotto:||2007|
|Digital Object Identifier (DOI):||10.1038/nn1824|
|Appare nelle tipologie:||1.1 Articolo in rivista|