Table 2.
Best-fit cable parameters of OPCs
| Parameter | OPC-1 | OPC-2 | OPC-3 | OPC-4 | OPC-5b | Mean ± SEM |
|---|---|---|---|---|---|---|
| Age (days) | 24 | 27 | 22 | 24 | 19 | 23.2 ± 1.3 |
| Recording configurationa | D-S | D-S | D-S | D-S | D-S | - |
| RN (MΩ) | 68.1 | 177.7 | 97.1 | 58.8 | 218.3 | 124.0 ± 31.5 |
| τm (ms) (short/long pulse) | 2.7/2.9 | 7.3/8.2 | 2.7/3.4 | 2.1/2.5 | 8.7/9.8 | 4.7 ± 1.4/5.4 ± 1.5 |
| No. of traces averaged | 289 | 266 | 297 | 288 | 56 | 239.2 ± 46.0 |
| Rm (kΩ cm2) | 2.8 | 5.7 | 2.5 | 1.9 | 7.5 | 4.1 ± 1.1 |
| Cm (μF cm−2) | 1.1 | 1.3 | 1.2 | 1.2 | 1.4 | 1.2 ± 0.1 |
| Ri (Ω cm) | 167.5 | 93.1 | 142.3 | 111.6 | 215.1 | 146.0 ± 21.5 |
a
D-S, dual somatic recording.
b
After addition of 100 μm Ba2+, the best-fit values for Rm, Cm and Ri were 77.8 kΩ cm2, 1.2 μF cm−2 and 222 Ω cm, respectively.