Fig. 7.

Effects of cesium on glial currents in hippocampal slices. Recordings from stratum radiatum glial cells were performed under both current and voltage clamp. a, Current clamp from an electrophysiologically identified glial cell. Note the absence of action potentials even with large depolarizing current injections (RMP = −75 mV). b, Voltage-clamp analysis revealed that a Cs⁺-sensitive inwardly rectifying current with a reversal potential of −72 mV was expressed in these cells (holding potential −35 mV).