[CTN] CTN seminar: Mazyar Fallah (York) 3:30 Tuesday Sept 17, E5 2004.

[Bryan Tripp]

Hi everyone,

Please join us next Tuesday for the first CTN seminar of the season. The
speaker is Mazyar Fallah; more details below. Hope to see you there!

Bryan

Cortical Interactions in the Oculomotor System
M. Fallah (York University)

Previous neurophysiological studies have demonstrated that saccade
curvatures are the result of excitatory and competitive interactions
between potential saccade goals in the intermediate layers of the superior
colliculus (SCi) and frontal eye field (FEF), whereby the resulting saccade
curvature is proportional to the level of unresolved activity encoding a
competing saccade vector. This suggests that the magnitudes of saccade
curvature vary continuously along a gradient of oculomotor excitation and
inhibition. Given that top-down factors like task relevance are encoded by
the visuomotor neurons of the oculomotor system (reviewed by Fecteau &
Munoz, 2006), this predicts a functional relationship between saccade
curvature and cortical visual processing. I will be presenting a series of
studies that investigates the featural and temporal factors affecting
saccadic encoding, as measured by saccade curvatures. These studies provide
increasing evidence that visual processing can be read out of saccade
metrics.
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