Competitive Dynamics in MSTd: A Mechanism for Robust Heading Perception Based on Optic Flow
Fig 13
Diagram of the model V1–MT+ motion detection microcircuit.
V1 complex cells receive on-center/off-surround input from simple cells, broadly tuned to motion. Simple cells are grouped by complex cells parallel to their preferred direction of motion, and simple cells positioned perpendicular to the preferred direction inhibit the complex cell. MT+ units refine the motion estimates by grouping over a larger spatial extent, and sending feedback to inhibit complex cells with discrepant direction selectivities in the receptive field.