Fig. 4.

Effect of bicuculline application into the VP 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 bicuculline application into the VP, the early excitation was not modified, the duration of the inhibition was slightly increased, and the late excitation was markedly decreased. The maximal effect was observed 10 min after the beginning of bicuculline application, and the recovery of the late excitation occurred 60 min after the cessation of bicuculline application. Each poststimulus time histogram represents 100 superimposed sweeps. Arrowindicates the stimulation artifact.