(A) Peri-stimulus time histograms (PSTHs) of spike-responses of a class 2 complex area 19 cell, to optimally oriented bar moving at different velocities across it’s RF. Upper row—before cooling, middle row—during cooling and lower row—after rewarming. Note, the absence of background spike-activity in all conditions. (B) Effects of cooling on peak magnitudes (spikes/s) of visually evoked responses of an area 19 neuron whose responses are illustrated in (A). (C) Effects of cooling on visually evoked background spike-activities of area 19 neurons. Note that only in two cells (*) there was significant reduction. (D) The peak magnitudes of visually evoked responses before cooling PTV vs. those during cooling (i). (ii) Cells tested for velocity-tuning. (iii) Cells tested for orientation-tuning. A-pr and A-npr refer to responses of cell in Figure 3A at preferred and non-preferred directions respectively. Note that the same cell is represented twice. (iv) Responses after rewarming PTV—all but one cell exhibited significant recovery. # In (i, ii and iv) denote responses indicated by # in (B).