Fig. 7.

Effects of hindbrain hemisections on escape swimming. (A) Schematic diagram of hindbrain and spinal cord in dorsal view showing the approximate location of the hindbrain hemisection on the left, rostral to the obex and caudal to the otic capsule. (B,C) C-start activity in response to hyperthermia was not abolished by surgery (B) but, compared with control preparations (C) in which activity occurred either on the right (green) or left (red) sides, activity only began on the side contralateral to the hemisection (B,C – right histogram). Note that the total number of escape sequences in each case (N=5 preparations analysed for control hemisectioned) was similar.