Diversity of feature selectivity in macaque visual cortex arising from limited number of broadly-tuned input channels
Yamni Mohan, Jaikishan Jayakumar, Errol KJ Lloyd, Ekaterina Levichkina, Trichur Vidyasagar
Cerebral Cortex | Oxford University Press (OUP) | Published : 2018
Spike (action potential) responses of most primary visual cortical cells in the macaque are sharply tuned for the orientation of a line or an edge and neurons preferring similar orientations are clustered together in cortical columns. The preferred stimulus orientation of these columns span the full range of orientations, as observed in recordings of spikes, which represent the outputs of cortical neurons. However, when we imaged also the thalamic input to these cells that occur on a larger spatial scale, we found that the orientation domain map of the primary visual cortex did not show the diversity of orientations exhibited by signals representing outputs of the cells. This map was dominat..View full abstract
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Awarded by Australian National Health and Medical Research Council
Australian National Health and Medical Research Council Project Grant (APP1060610 to T.R.V.).