Figure 4.

The GABA_A receptor antagonist, bicuculline (BMI), blocks post-tetanic γ oscillations. (A): a. BMI (5 μM) induced multiple field potential spikes to a single stimulation, b and c. BMI reversibly blocked post-tetanic γ oscillations. (B) BMI (20 μM) blocked high intensity (4 mA) tetanic stimulation-induced γ oscillation, but not the slow SD. The traces in (A) were recorded from the same neuron (n = 6 experiments) and in (B) from another neuron (n = 4 experiments).