Figure 9.

A, Spontaneous membrane potentials recorded simultaneously from a pair of SGI neurons (cell-1 and cell-2) in the presence of 10 μm Bic and low (0.1 mm) Mg ²⁺. The intracellular solution contained 5 mm QX-314. B, Plots of membrane potentials (1) and normalized membrane potentials (2) for cell-1 against cell-2. C, Spontaneous membrane potentials recorded simultaneously from a pair of SGI neurons (cell-3 and cell-4) in the presence of 10 μm Bic and low (0.1 mm) Mg ²⁺ (1), and after application of 50 μm APV (2). The intracellular solution contained 5 mm QX-314 plus 30 mm BAPTA. D, Simultaneous recordings of synaptic responses from a pair of SGI neurons (cell-5 and cell-6) after stimulation of the SGS (arrow) in the presence of 10μm Bic and low (0.1 mm) Mg ²⁺. The intracellular solution did not contain QX-314.