Fig. 5. Pharmacological identification of GABA_A receptor-mediated ePSCs in GluR cells. (A,B) Averaged sub-threshold field potentials (top traces) and whole-cell currents (–80 mV, bottom) are depicted, which were recorded in response to 120 single stimulation pulses (150 µs, 10 second intervals) in the presence of NBQX (10 µM; A) or bicuculline (10 µM; B). Note the almost complete block of glial inward currents by bicuculline. [Cl^–]_i was always 135 mM.