Fig. 9. Can auditory inputs be gated? Intracellular recordings of SETi during stimulation of descending pathways (A) and during pharmacologically elicited motor activity using pilocarpine (B) or picrotoxin (not shown). Chirps (4.8 kHz 90 dB) were presented at 2 Hz repetition rate. Neither stimulation of descending pathways nor pharmacological manipulation gated any auditory inputs to SETi. In both cases a hyperpolarising current (5 nA) was injected to reveal even small inputs.