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 Neuroscijournal_title
Nature neuroscienceauthors
Nieder A,Wagner Hdoi
10.1038/10217subject
Has Abstractpub_date
1999-07-01 00:00:00pages
660-3issue
7eissn
1097-6256issn
1546-1726journal_volume
2pub_type
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