Figure 1.

A, Schematic illustration of the left and right hemispheres of the cat cerebrum showing the 13 areas of cat auditory cortex. A1 is highlighted in black and AAF is shown in gray. B, Representative examples of reversible cooling loop placement in left (left side) and right (right side) hemispheres from two implanted animals. temperature changes during A1 (left) and AAF (right) cooling deactivation epochs. C, Temperature changes were recorded from a single animal during cooling loop. Notice that deactivation did not extend to adjacent cortical fields. D, Temperature changes recorded at A1 and AAF cooling loops of an implanted animal during a complete cooling deactivation cycle. Numbers on top indicate the phase of the cycle, with even numbers representing transitional temperature periods and odd numbers showing constant temperature epochs. Note that colors are presented as a guide of cortical temperature changes during cooling deactivation and are not associated with a color bar. A1, primary auditory cortex; AII, second auditory cortex; AAF, anterior auditory field; dPE, dorsal posterior ectosylvian area; DZ, dorsal zone of auditory cortex; FAES, auditory field of the anterior ectosylvian sulcus; IN, insular region; iPE, intermediate posterior ectosylvian area; PAF, posterior auditory field; T, temporal region; VAF, ventral auditory field; vPAF, ventral posterior auditory field; vPE, ventral posterior ectosylvian area. The sulci are indicated by italics: aes, anterior ectosylvian sulcus; ss, suprasylvian sulcus; pes, posterior ectosylvian sulcus. D, dorsal; A, anterior; P, posterior; V, ventral.