Visual cortex

The visual cortex processes visual information. It consists of at least six regions. Anything outside the striate cortex is an extrastriate cortex.

V1 (striate cortex)
Receives input from the LGN. Seperates the information into blobs (colour) and interblobs (form and movement).

V2
Gets input from V1. Consists of stripes: Thick ones (movement), thin ones (colour) and pale zones (form).

V3
Gets input from V2. Processes dynamic form.

V3A processes form.

V4
Gets input from V2. Processes colour and form. It's cells are responsive to different perceived colour, with the center being excited by a certain colour, and the surround being inhibited. This plays a role in colour constancy.

V5
Gets input from V2. Processes motion.

Beyond the visual cortex
Dorsal stream: Input from V3A and V5, goes to Parietal lobe.

Ventral stream: Input from V3 and V4, goes to Temporal lobe.