Fig. 7. Additional trials of the fish illustrated in Figs 5, 6 are shown to illustrate the diversity of response within an individual and for the same electrodes. Broken lines and numbers correspond to the numbering in the previous corresponding figures: (1) initiation, (2) transition point, (3) end of withdrawal and (4) omega. Note that the differences in the strengths of activity across electrodes may in part be due to variability in electrode construction and placement. (A) Head stimulation trials comparable to the trial illustrated in Fig. 5. (B) Tail stimulation trials comparable to the trial illustrated in Fig. 6. We show a total of six trials from one fish (three head stimuli and three tail stimuli; Figs 5, 6, 7) so that the EMG activity patterns can be compared for individual electrodes across trials. Scale bar: 0.2 mV (head stimulus trials) and 0.8 mV (tail stimulus trials).