p306fig08.26 The 3D FORMOTION model combines mechanisms for determining the relative depth of a visual form with mechanisms for both short-range and long-range motion filtering and grouping.  A formotion interaction from V2 to MT is predicted to enable the motion stream to track objects moving in depth.<BR>||  3D Formotion model (Chey etal 1997; Grossberg etal 2001; Berzhanskaya etal 2007). Form [LGN contours -> simple cells orientation selectivity -> complex cells (contrast pooling, orientation selectivity, V1) -> hypercomplex cells (end-stopping, spatial sharpening) <-> bipole cells (grouping, cross-orientation competition) -> depth-separated boundaries (V2)],  Motion: [LGN contours -> transient cells (directional stability, V1) -> short-range motion filter -> spatial competition -> long-range motion filter and boundary selection in depth (MT) <-> directional grouping, attentional priming (MST)]