Orientation-cue invariant population responses to contrast-modulated and phase-reversed contour stimuli in macaque V1 and V2.

ABSTRACT: Visual scenes can be readily decomposed into a variety of oriented components, the processing of which is vital for object segregation and recognition. In primate V1 and V2, most neurons have small spatio-temporal receptive fields responding selectively to oriented luminance contours (first order), while only a subgroup of neurons signal non-luminance defined contours (second order). So how is the orientation of second-order contours represented at the population level in macaque V1 and V2? Here we compared the population responses in macaque V1 and V2 to two types of second-order contour stimuli generated either by modulation of contrast or phase reversal with those to first-order contour stimuli. Using intrinsic signal optical imaging, we found that the orientation of second-order contou

SUBMITTER: An X 

PROVIDER: S-EPMC4154761 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature