Preferred direction of movement as an element in the organization of cat visual cortex

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Abstract
Neurones recorded close together in the cat's striate cortex prefer not only the same orientation of elongated visual stimulus but also the same direction of stimulus movement. The degree of similarity in both preferred orientation and preferred direction is greater in electrode penetrations made perpendicular to the cortical surface than in oblique penetrations. This suggests that preferred direction is organized in columnar fashion, just as is orientation.