Figure 11.
Cell-attached recordings of GABAergic postsynaptic responses in the neonatal hippocampus. (A) Scheme of the experimental setup. GABA-PSPs are evoked by electrical stimulation in the presence of the ionotropic glutamate antagonists CNQX (10 μM) and d-APV (40 μM) in a neonatal mouse hippocampal slice. Responses were recorded from CA3 pyramidal cells in CA/CC configuration without disturbance of intracellular chloride concentration. (B) Average evoked GABA-PSPs in five CA3 pyramidal cells, of which four show depolarizing responses (cells #1–4) and one (cell #5) shows a hyperpolarizing response. Inset shows group data on the amplitude of evoked GABA-PSPs recorded from 9 CA3 pyramidal cells of P6 mouse. (C) Example traces of evoked GABA-PSPs, some of which trigger APs. Below, a corresponding AP peristimulus time histogram.