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. 1998 Jun 15;18(12):4425–4438. doi: 10.1523/JNEUROSCI.18-12-04425.1998

Fig. 5.

Fig. 5.

Passive properties of CA3 and CA1 astrocytes.A, Resting membrane potentials were not statistically significantly different in the three subpopulations (based on current profile) of astrocytes in either CA1 or CA3 regions: CA1 complex, −71 ± 3 mV (n = 3); inward rectifier, −69 ± 2 mV (n = 8); linear, −67 ± 2 mV (n = 29); CA3 complex, −68 ± 3 mV (n = 10); inward rectifier, −66 ± 2 mV (n = 32); and linear, −68 ± 2 mV (n = 7). B, Cell input resistance values were significantly lower in CA1 than CA3 astrocytes regardless of current profile. RIN values were, for complex profile cells: CA1, 70 ± 20 MΩ (n = 3); and CA3, 230 ± 20 MΩ (n = 10); for inward rectifier profile cells: CA1, 65 ± 10 MΩ (n = 8); and CA3, 150 ± 30 MΩ, (n = 32); and for linear profile cells: CA1, 75 ± 15 MΩ (n = 29); and CA3, 68 ± 10 MΩ (n = 7).C, There was no significant correlation between cell resting membrane potential and input resistance in hippocampal astrocytes. Fitting of RIN data plotted against RMP gave a slope of 1.63 MΩ/mV.