Fig. 5.

Responses of NS neurons to motoneuron excitation.A, The two bottom traces show representative recordings of the simultaneous responses of both NS neurons within a single ganglion to the stimulation of a CV motoneuron with a square current pulse (square step line ontop). The top trace shows the recording of the CV motoneuron during the pulse injection. The small action potentials recorded in the soma reflect the passive propagation of fully developed action potentials initiated at an electrically distant site (Stuart, 1970). B, Average cross-correlogram. The cross-correlograms (bin size 0.2 msec) of 11 different pairs of traces were averaged. The broken lines represent the 95% confidence interval for the mean cross-correlation index.