Fig. 5. Reciprocal inhibition between sint1 neurons. (A,B). Simultaneous recordings from Rsint1 (upper trace) and Lsint1 (lower trace) in a quiescent whole animal preparation. In A, Rsint1 was driven to fire a burst of action potentials while the voltage in Lsint1 was recorded at 4 x higher gain. The same procedure was followed in B, where Lsint1 was stimulated. (C,D). Unitary ipsp in Lsint1 during stimulation of Rsint1. Rsint1 was driven to fire either a single action potential (C) or a series of seven action potentials at a rate of one per second (D, sweeps superimposed). Asterisks indicate the time of occurrence of the ipsp. This experiment was repeated in six different whole animal preparations with consistent results.