Fig. 13. Intersegmental inhibitory effect of TSR-3 on TSR-2. Stretch-induced discharges of TSR-2 are interrupted (A) by stretch-induced activity of TSR-3 (C). The upward deflection of the lower trace in C shows three consecutive stretch stimuli of 1.0 mm. These interruptions are also displayed through a window discriminator (B). The application of a stretch stimulus (1.2 mm) to TSR-2 is indicated by an upward deflection in the trace below B. (D) The region of the recording indicated by double-headed arrows in A shown on an expanded time scale. In nerve 3, small spikes (spike height indicated by facing double arrows to the right of the trace) correspond to the appearance of stretch-activated responses of TSR-3, whose responses are also presented as a frequency histogram.