Fig. 3.

Traces from a contralateral NELL axon recorded in the ELa. This recording typifies the most common type of unit recorded in the ELa. The large deflections 1 msec from the beginning of the trace are stimulus artifact. A, Response at the one-to-one firing threshold. Ten responses to a 0.05 msec, 14 mV/cm, reverse polarity square pulse are overlaid. B, Responses 5 dB below the one-to-one firing threshold. The 19 stimulus presentations of a 0.05 msec, 8.0 mV/cm, reverse polarity square pulse are overlaid. C, D, Responses to reverse (C) and normal (D) polarity stimuli of 0.05, 0.6, and 1 msec durations.