Summary
Microelectrode penetrations nearly normal to the layers of foveal striate cortex in awake, behaving monkeys reveal a shift in orientation preference between cells in the upper and lower layers. Mean shift size for 57 penetrations is 54.8 °, with 70% of the penetrations showing shifts of 45–90 °. Marking lesions localize the shift to the border between layers 4C and 5. The data are suggestive of inhibition between the upper and lower layers within an “orientation column”.
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Supported by NIH grants EY02349 and 5-T32EY07019. R. Bauer was supported in part by a fellowship from the Deutsche Forschungsgemeinschaft (DFG)
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Bauer, R., Dow, B.M., Snyder, A.Z. et al. Orientation shift between upper and lower layers in monkey visual cortex. Exp Brain Res 50, 133–145 (1983). https://doi.org/10.1007/BF00238240
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DOI: https://doi.org/10.1007/BF00238240