Table 1 Characteristics of 4 tetrapolar probes used in the study.
Name | Pitch circle diameter (mm) | Electrode separation (between centres, mm) | Electrode diameter (mm) | Probe diameter (mm) | Peak current (μA) |
|---|---|---|---|---|---|
3 mm | 2 | 1.41 | 0.6 | 5 | 3.00 |
6 mm | 3 | 2.12 | 1.5 | 9 | 4.41 |
9 mm | 5.5 | 3.89 | 1.5 | 10 | 8.33 |
12 mm | 8.5 | 6.01 | 1.5 | 12 | 12.5 |