Fig. 1. Responses of a DON neuron to a 2 Hz sinuosidal electric field moved at 0.5 cm s^-1 along the rostro-caudal axis of the rostrum. (A) Firing rate as a function of time. (B) As in A, but filtered and multiplied by the 2 Hzstimulus, showing the phase relationship of the response to the stimulus.