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Image-based contour integration
( Collector units:, Extrastriate feedback:, Cooperative interactions: ) Local edge responses feed forward to neurons that collate them, those of which have their
output signals representing a contour.
( Extrastriate Feedback:, Collector units:, Cooperative interactions: ) Feedback from high cortical areas modulate the activity in V1 cells, increasing
responses to contours.
( Cooperative interactions:, Extrastriate feedback:, Collector units: ) Edge responses are propagated laterally, producing mutual facilitation when
neurons nearby are also active.