Orientation selectivity

Orientation selectivity is expressed by cells within the visual cortex, when such cells increase impulse or signal activity for specific oriented degree of lines or bars presented within the visual field.

[2][1] Single receptive field cells across the retina, LGN, and primary visual cortex are in a state of continuous neurotransmission.

[1] Impulse activity is the continuous state of regular and constant neurotransmission between neurons.

[2] Only a bar of light stimulus oriented at the correct angle and position within the receptive field covering only the excitatory region excluding the two inhibitory regions would express the greatest increase in the rate of impulse activity for that cell.

[2] Some layers of the striate cortex were found to contain orientation and direction selective cells.

Orientation selectivity as it was first seen and measured in the cat's visual cortex via microelectrode analysis paired with visual stimulus. [ 2 ]