Table 1.
Electrophysiological data.
| Nerve patient | Patient 1 (IV:2) | Patient 2 (III:4) | Patient 3 (III:5) | Patient 4 (III:7) | ||||
|---|---|---|---|---|---|---|---|---|
| Left | Right | Left | Right | Left | Right | Left | Right | |
| Median nerve | ||||||||
| MCV (m/s) | 55 | 59 | 45 | 50 | 56 | 54 | 55.1 | 59.4 |
| Distal latency (ms) | 3.33 | 3.44 | 4.58 | 4.06 | 3.70 | 3.49 | 3.1 | 3.5 |
| CMAP amplitude (mV) | 11.8 | 7.9 | 10.9 | 10.9 | 13.2 | 16.9 | 10.5 | 10.7 |
| SCV (m/s) | NR | NR | NR | NR | NR | NR | 52.2 | 55 |
| SNAP amplitude | NR | NR | NR | NR | NR | NR | 20.6 | 14.9 |
| F mean latency (ms) | 28.1 | 29.5 | 31.2 | NR | 25.9 | 25.8 | 24.9 | / |
| F% | 100 | 90 | 30 | 0 | 100 | 100 | 100 | / |
| Ulnar nerve | ||||||||
| MCV (m/s) | 59 | 55 | 35 | 46 | 65 | 52 | 60.9 | 60.5 |
| Distal latency (ms) | 3.23 | 3.02 | 2.81 | 3.54 | 3.54 | 3.23 | 2.7 | 2.8 |
| CMAP amplitude (mV) | 7.8 | 6.4 | 3.5 | 5.2 | 8.6 | 4.4 | 10.8 | 13.4 |
| SCV (m/s) | NR | NR | NR | NR | NR | NR | 54.8 | 56.2 |
| SNAP amplitude | NR | NR | NR | NR | NR | NR | 12.9 | 13.8 |
| F mean latency (ms) | 30.7 | 30.0 | 30.1 | 30 | 27.7 | 27.8 | 49.3 | 49.7 |
| F% | 100 | 80 | 60 | 90 | 100 | 80 | 100 | 100 |
| Tibial nerve | ||||||||
| MCV (m/s) | 43 | 46 | NR | NR | 35 | NR | 48.9 | 48.3 |
| Distal latency (ms) | 6.25 | 4.58 | NR | NR | 7.60 | NR | 4.0 | 4.0 |
| CMAP amplitude (mV) | 4.6 | 2.0 | NR | NR | 0.6 | NR | 12.7 | 16.0 |
| Sural nerve | ||||||||
| SCV (m/s) | NR | NR | NR | NR | NR | NR | 56.3 | 51.2 |
| SNAP amplitude | NR | NR | NR | NR | NR | NR | 5.6 | 2.1 |
| Superficial peroneal nerve | ||||||||
| SCV (m/s) | NR | NR | NR | NR | NR | NR | 42.9 | 44.5 |
| SNAP amplitude | NR | NR | NR | NR | NR | NR | 4.9 | 2.5 |
MCV, motor conduction velocity; CMAP, compound motor action potential; SCV, sensory conduction velocity; SNAP, sensory nerve action potential; NR, not recordable.