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Spatial structure and symmetry of simple-cell receptive fields in macaque primary visual cortex.
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2002 |
| Abstract | I present measurements of the spatial structure of simple-cell receptive fields in macaque primary visual cortex (area V1). Similar to previous findings in cat area 17, the spatial profile of simple-cell receptive fields in the macaque is well described by two-dimensional Gabor functions. A population analysis reveals that the distribution of spatial profiles in primary visual cortex lies approximately on a one-parameter family of filter shapes. Surprisingly, the receptive fields cluster into even- and odd-symmetry classes with a tendency for neurons that are well tuned in orientation and spatial frequency to have odd-symmetric receptive fields. The filter shapes predicted by two recent theories of simple-cell receptive field function, independent component analysis and sparse coding, are compared with the data. Both theories predict receptive fields with a larger number of subfields than observed in the experimental data. In addition, these theories do not generate receptive fields that are broadly tuned in orientation and low-pass in spatial frequency, which are commonly seen in monkey V1. The implications of these results for our understanding of image coding and representation in primary visual cortex are discussed. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://jn.physiology.org/content/jn/88/1/455.full.pdf |
| PubMed reference number | 12091567v1 |
| Volume Number | 88 |
| Issue Number | 1 |
| Journal | Journal of neurophysiology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Area striata structure Cerebral cortex Class Hearing Loss, High-Frequency Large Macaca Population Parameter Spatial Frequency Visual Cortex |
| Content Type | Text |
| Resource Type | Article |
