Perception and neuronal coding of subjective contours in the owl.

Abstract:

:Robust form perception and underlying neuronal mechanisms require generalized representation of object boundaries, independent of how they are defined. One visual ability essential for form perception is reconstruction of contours absent from the retinal image. Here we show that barn owls perceive subjective contours defined by grating gaps and phase-shifted abutting gratings. Moreover, single-neuron recordings from visual forebrain (visual Wulst) of awake, behaving birds revealed a high proportion of neurons signaling such subjective contours, independent of local stimulus attributes. These data suggest that the visual Wulst is important in contour-based form perception and exhibits a functional complexity analogous to mammalian extrastriate cortex.

journal_name

Nat Neurosci

journal_title

Nature neuroscience

authors

Nieder A,Wagner H

doi

10.1038/10217

subject

Has Abstract

pub_date

1999-07-01 00:00:00

pages

660-3

issue

7

eissn

1097-6256

issn

1546-1726

journal_volume

2

pub_type

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