Spatiotemporal Dynamics of the Line-Motion Illusion in Primary Visual Cortex

Aaditya Rangan

Courant Institute.


A common visual illusion is the 'line-motion-illusion': a movie of a quickly flashed nonmoving square followed by a long, nonmoving bar giving rise to the visual sensation that the bar is growing outward from the square. Recent experiments by Grinvald et al. suggest that the primary visual cortex (V1) is actually 'fooled' by this illusion -- the cortex responds as if a growing bar were presented. Using a large-scale computational model of V1, I will explain possible network mechanisms underlying this phenomenon.

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