Fig. 3. Ketamine depression of evoked excitatory postsynaptic currents (eEPSCs) in representative capsaicin (CAP)-sensitive and capsaicin-resistant medial NTS neurons (V^H=−70 mV). (A ) Ketamine, 1 mm, completely blocked eEPSCs within 5 min in this capsaicin-sensitive neuron. (B ) In a capsaicin-resistant neuron, 3 but not 1 mm ketamine completely blocked eEPSCs. Each trace is a mean representing the average of 10 consecutive, individual eEPSC traces at each condition.