Figure 4.

Bilateral lesion in CMS and CLS and significance for evoked chirp response in Apteronotus. Same convention as in Figs. 1 and 3. (A) Frontal sections, about 250 μm apart. Sectioning occurred asymmetrically. Thus, in part 1, only the right half of the brain was sectioned. (B) Examples of evoked chirps before (upper trace) and after (lower trace) injection of ibotenic acid. (C) Effects on relative duration of evoked chirps. Left pair of boxes, same fish as shown in A and B (rank sum test, P = 0.600); right box pair, average for four fish (rank sum test, P = 0.351). (D) Effects on frequency change during evoked chirping. Left box pair, same fish as in A and B (rank sum test, P = 0.977); right box pair, average of four fish (rank sum test, P = 0.889).