(A) The dorsolateral view of cat’s left cerebral hemisphere with approximate location of electrode penetrations in area 19. Upward arrow indicates approximate position of the Horsley-Clarke anterior-posterior zero coordinates. Dark gray area indicates the location of the foot of the cooling probe which covered most of areas 20a and 20b. Lighter gray indicates the spread of cooling in the vicinity of cooling foot. (B) A block diagram of the cat’s visual system with simplified neuronal circuitry of retino-geniculo-cortical pathways, pattern/form and motion processing cortico-cortical hierarchies. Note that many cortical areas including area 19 and postero-temporal visual (PTV) cortex are directly interconnected via horizontal cortico-cortical feedforward and feedback connections (after Rosenquist, 1985; Dreher, 1986; Salin and Bullier, 1995; Scannell et al., 1995; Dreher et al., 1996). (C) The location of receptive field (RF) centers of 28 area 19 neurons tested for the effects of cooling of PTV. Note the location of RF centers of 11 area 17 neurons examined for velocity-tuning in the previous series of experiments (Huang et al., 2007). (D) Outlines of RFs of area 19 neurons of two cats included in the present study. The effects of cooling PTV were tested only in some cells. The bottom right insert plots area 19 cells’ average RF areas at azimuths around 5° and 20°. (E) Frequency distribution of eye dominance classes of area 19 cells recorded in the present study (solid lines) and the cooling sample (red dotted lines). Area 17 data are shown in green.