Table 1. Morphological, electrical and ion channel parameters of the different parts of a normal SGN fiber.
Values as in [17] except for Ra and myelinated segment length which were modified for rodent SGN fibers.
| Parameters | Unmyelinated segment | Heminode | Myelin | Node |
|---|---|---|---|---|
| Length (μm) | 10 | 1 | 40 [modified] | 1 |
| Diameter (μm) | 1.2 | 1.2 | 2.2 | 1.2 |
| gNa (S/cm2) | 0.01208 | 0.1812 | 0 | 0.1812 |
| gK (S/cm2) | 0.015 | 0.225 | 0 | 0.225 |
| Rm (ohm-cm2) | 1662 | 1662 | 1300000 | 1662 |
| C (μF/cm2) | 0.05125 | 0.05125 | 0.0012 | 0.05125 |
| Ra (ohm-cm) | 8291.4 [modified] | |||
gNa, maximal sodium conductance; gK, maximal potassium conductance; Rm, specific membrane resistance; C, specific capacitance; Ra, specific cytoplasmic resistance.