Passive membrane properties of interneurons classed by axonal arborization
| Cell type | |||||
|---|---|---|---|---|---|
| TML (n = 13) | GCL (n = 3) | IML (n = 7) | OML (n = 3) | Granule cells (n = 16) | |
| RMP, mV | −54.5 ± 1.9 | −51.7 ± 4.3 | −60.5 ± 2.6 | −57.0 ± 2.6 | −75.3 ± 1.22 |
| R N, MΩ | 198.2 ± 23.8 | 228.5 ± 69.8 | 182.2 ± 27.2 | 252.3 ± 78.0 | 261.8 ± 38.2 |
| τ1, msec | 0.93 ± 0.13 | 1.48 ± 0.43 | 1.38 ± 0.20 | 1.11 ± 0.37 | 1.03 ± 0.18 |
| τ0, msec | 18.4 ± 1.1 | 15.9 ± 2.7 | 14.8 ± 1.8 | 16.9 ± 1.8 | 23.2 ± 4.3 |
| L, cell | 0.72 ± 0.07 | 0.98 ± 0.12 | 1.01 ± 0.071 | 0.80 ± 0.13 | 0.67 ± 0.04 |
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This table exhibits the mean values and SEMs for the resting membrane potential (RMP), input resistance (R N), membrane time constant (τ0), equalizing time constant (τ1), and electrotonic length calculated from τ0 and τ1 (L) for the four different morphological groups and the sample of granule cells.1Note that there was no clear difference in these values among the different morphological groups in general with the exception that one-way ANOVA indicated that the L value for IML cells was longer than that of TML cells and granule cells (p < 0.05). 2The RMP of the granule cells was also significantly greater than all classes of interneurons (p < 0.01). The τ values for granule cells were determined at a membrane potential of −75 mV. All values in this and subsequent tables are means ± SEMs.