Medial superior temporal area
The medial superior temporal (MST) area is a part of the cerebral cortex lying in the dorsal stream of the visual area of the primate brain. The MST receives most of its inputs from the medial temporal (MT) area, which is involved primarily in the detection of motion. The MST uses the incoming information to compute things such as optic flow.
References
Bayerl & Neumann. (2002). Recurrent processing in the dorsal pathway underlies the robust integration and segregation of motion patterns. Journal of Vision 2, 658-658.
Ichikawa M, Masakura Y & Munechika K. (2006). Dependence of illusory motion on directional consistency in oblique components. Perception 35, 933-946.