We regard the extrastriate areas, such as V2, V3, V4, and the middle-temporal area (MT or V5) as being in the mid stage. These areas respond to visual signals more globally than does V1. It has been suggested that V4 correlates with color constancy (Zeki 1993) and a surface representation (Bouvier et al. 2008).MT (V5) of monkeys/humans and V3A of humans have been found to respond to globalmotion (