FIG. 12.

A neuron in which GZ eliminated both HFI and FM rate selectivity. A: in the control condition, the neuron was rate-selective for downward FM sweeps with a 50% CO rate of 3 kHz/ms. This panel also shows the recovery data for rate selectivity. The rate selectivity was eliminated by GZ (20 nA ejection current). The maximum responses to 20 stimulus repetitions were as follows: control condition, 42 spikes; GZ condition, 120 spikes; REC condition, 42 spikes. B: high-frequency inhibition (HFI) centered at 75 kHz was delayed with the 50% arrival time of +2.5 ms. The HFI was eliminated by GZ. The responses to 20 repetitions of the excitatory tone alone were as follows: control condition, 32 spikes; GZ condition, 102 spikes.