Journal
JOURNAL OF NEUROPHYSIOLOGY
Volume 100, Issue 1, Pages 539-547Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/jn.00997.2007
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Funding
- NCI NIH HHS [R01 CA094143] Funding Source: Medline
- NEI NIH HHS [R01 EY009050, R01 EY009050-15] Funding Source: Medline
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There is ample evidence from demonstrations such as color induction and stabilized images that information from surface boundaries plays a special role in determining the perception of surface interiors. Surface interiors appear to fill-in. Psychophysical experiments also show that surface perception involves a slow scale-dependent process distinct from mechanisms involved in contour perception. The present experiments aimed to test the hypothesis that surface perception is associated with relatively slow scale-dependent neural filling-in. We found that responses in macaque primary visual cortex (V1) are slower to surface interiors than responses to optimal bar stimuli. Moreover, we found that the response to a surface interior is delayed relative to the response to the surface's border and the extent of the delay is proportional to the distance between a receptive field and the border. These findings are consistent with some forms of neural filling-in and suggest that V1 may provide the neural substrate for perceptual filling-in.
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