Fig. 5. (A–E) Responses of DBNi2-1 (A,B), DBNc1-2/c2-2 (C,D) and DBNc2-3 (E) to forced deflections of the ipsilateral scape–pedicel joint. (A) Responses of one DBNi2-1 consisted of spikes. This DBNi2-1 responded best to adductions between 80 and 67° with an average of 23 spikes per ramp. The asterisk marks a spike triggered by a small extra ramp at the medial turning point of the deflection. (B) Average activity over 11 stimulus periods at 90°s-1 for the same interneuron. (C) Recordings from DBNc1-2/c2-2 yielded compound excitatory postsynaptic potentials (EPSPs) and spikes. (D) DBNc1-2/c2-2 was more responsive to adductions than to abductions. Columns represent normalised mean spike counts per ramp (± S.E.M.) of all ramps during adduction versus abduction in five animals (N=23 stimulus periods at 90°s-1; Wilcoxon test P=0.03). (E) Compound EPSPs and bursts of spikes were triggered in one DBNc2-3 by abductions between 80 and 100° at 300°s-1 (five sweeps superimposed). Other angular positions were less effective in stimulating this example of DBNc2-3.
