FIG. 4.

Contralateral B4/5 input does not inhibit spike propagation in the contralateral process. A: Camera Lucida drawings of a B21 (red) and a contralateral B4/5 (blue) showing the electrode placement for the experiment shown in B. B: B21 was peripherally activated at ∼1 Hz when a probe contacted the subradula tissue. The bottom traces are low-speed intracellular recordings from all 3 intracellular electrodes. The top trace is a high-speed recording of contralateral responses (1) before B4/5 stimulation and (2) during B4/5 stimulation. Note that B4/5 stimulation does not inhibit contralateral spike propagation. C: group data for experiments as shown in B.