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J Physiol Volume 583, Number 2, 581-592, September 1, 2007 DOI: 10.1113/jphysiol.2007.130294
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NEUROSCIENCE

Cue-invariant detection of centre–surround discontinuity by V1 neurons in awake macaque monkey

 Zhi-Ming Shen1,2, Wei-Feng Xu1,2 and Chao-Yi Li1

1 Institute of Neuroscience, Key Laboratory for Neurobiology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, China
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Visual perception of an object depends on the discontinuity between the object and its background, which can be defined by a variety of visual features, such as luminance, colour and motion. While human object perception is largely cue invariant, the extent to which neural mechanisms in the primary visual cortex contribute to cue-invariant perception has not been examined extensively. Here we report that many V1 neurons in the awake monkey are sensitive to the stimulus discontinuity between their classical receptive field (CRF) and non-classical receptive field (nCRF) regardless of the visual feature that defines the discontinuity. The magnitude of this sensitivity is strongly dependent on the strength of nCRF suppression of the cell. These properties of V1 neurons may contribute significantly to cue-invariant object perception.

(Received 13 February 2007; accepted after revision 26 June 2007; first published online 28 June 2007)
Corresponding author C.-Y. Li: Institute of Neuroscience, Key Laboratory for Neurobiology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, China. Email: cyli{at}sibs.ac.cn

This paper has online supplemental material.






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