Areal comparisons of sections reacted for the presence of Nissl bodies, SMI-32 reactivity, and cytochrome oxidase (CO) reactivity in auditory cortex. A: Left hemisphere macroscopic views of adjacent coronal sections reacted for Nissl, SMI-32, and CO, respectively. Representative auditory areas are labeled on the middle panel. Borders between areas are indicated with filled black circles. Scale bars = 1cm. B: Adjacent coronal sections through AI reacted for Nissl, SMI-32, and CO, respectively. Photomicrographs were taken at x40 and applies to B, C, and D. Scale bar = 500μm and applies to B, C, and D. C: Adjacent coronal sections through AAF reacted for Nissl, SMI-32, and CO, respectively. D: Adjacent coronal sections through DZ reacted for Nissl, SMI-32, and CO, respectively.