Fig. 3.
Effect of CNQX application into the NAcc on the response evoked by PL/MO stimulation in an SNR cell. Fromtop to bottom, The response exhibited a triphasic excitation–inhibition–excitation sequence in control conditions; under CNQX application into the NAcc, the early excitation was not affected, the inhibition disappeared, and the late excitation was markedly decreased. The maximal effect was observed 10 min after the beginning of CNQX application, and the recovery of the inhibition and of the late excitation occurred 40 min after the cessation of CNQX application. Each poststimulus time histogram represents 100 superimposed sweeps. Arrow indicates the stimulation artifact.