The direction selectivities of cells in primary visual cortex of the cat are believed to be determined by a number of thalamo-cortical and intracortical mechanisms (for reviews, see Orban, 1984; Eysel, 2002; Humphrey and Saul, 2002). There is also substantial evidence indicating that in both carnivores and primates, feedback from the higher-order cortical areas affects the direction selectivity of neurons in the primary visual cortices. Thus, in the New-World squirrel monkey, during reversible inactivation of area 18 (V2), some direction selective cells in the ipsilateral area 17, lose most of their direction selectivity (Sandell and Schiller, 1982). In the cat, reversible inactivation of pattern/form processing area such as area 21a and a part of area 19 results in large (>20%) changes in DSIs of ~20% of neurons in the visuotopically corresponding part of area 17 (Wang et al., 2000). The increases in DSI of neurons in areas 19 and 17 (see also Huang et al., 2007) accompanying upward changes in velocity preferences during cooling of PTV, may be related to the fact that in the cat’s primary visual cortices the DSIs vary with velocities of stimulus motion (Orban et al., 1981; Orban, 1984; Humphrey and Saul, 2002).