Table 2.
Nerve conduction velocities in 12 affected family members
| Patient | Age (yrs) | R/L | Median motor | Ulnar motor | Peroneal motor | Tibial motor | Median sensory | Ulnar sensory | Sural sensory | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Amp | CV | Amp | CV | Amp | CV | Amp | CV | Amp | CV | Amp | CV | Amp | CV | |||
| III-6 | 50 | R | 4.2 | 56.4 | 7.9 | 58.3 | A | A | 0.6 | 41.1 | 37.3 | 42.3 | 22.6 | 38.7 | 31.4 | 38.5 |
| 50 | L | 6.3 | 57.4 | 6.4 | 70.0 | A | A | 0.6 | 49.3 | 24.2 | 44.1 | 22.3 | 39.1 | 20.4 | 38.7 | |
| 52 | R | 4.8 | 56.5 | 5.9 | 56.4 | A | A | 0.7 | 45.6 | 33.5 | 44.1 | 24.9 | 40.4 | 22.2 | 39.3 | |
| 52 | L | 6.0 | 52.8 | 6.6 | 54.3 | A | A | 0.5 | 44.3 | 36.7 | 45.5 | 24.6 | 39.2 | 30.8 | 39.5 | |
| III-8 | 48 | R | 2.9 | 53.5 | 6.1 | 54.1 | A | A | 12.5 | 36.1 | 39.8 | 35.7 | 31.7 | 34.2 | 23.4 | 30.3 |
| 48 | L | 5.4 | 59.8 | 5.1 | 55.3 | A | A | 7.7 | 37.5 | 32.2 | 38.3 | 18.6 | 34.5 | 28.2 | 28.1 | |
| III-11 | 45 | L | 7.9 | 58.8 | 5.2 | 69.0 | 1.5 | 49.3 | 7.3 | 47.7 | 41.0 | 46.9 | 32.0 | 41.7 | 30.3 | 42.3 |
| III-13 | 40 | R | 10.3 | 56.1 | 9.9 | 56.4 | A | A | 16.5 | 45.6 | 47.8 | 42.3 | 23.6 | 41.7 | 24.4 | 39.5 |
| 40 | L | 6.9 | 59.5 | 7.7 | 63.9 | A | A | 14.7 | 43.8 | 59.1 | 42.9 | 28.7 | 39.1 | 24.0 | 34.1 | |
| 41 | R | 11.0 | 53.5 | 11.0 | 55.7 | A | A | 17.0 | 46.8 | 57.1 | 41.1 | 26.2 | 40.3 | 24.1 | 35.7 | |
| 41 | L | 7.3 | 53.7 | 7.3 | 57.5 | A | A | 16.8 | 43.3 | 49.0 | 41.7 | 22.6 | 39.1 | 22.3 | 36.1 | |
| III-16 | 33 | R | 7.1 | 59.0 | 7.0 | 64.7 | A | A | 10.6 | 48.1 | 43.7 | 48.4 | 26.0 | 40.3 | 27.1 | 41.2 |
| 33 | L | 8.2 | 57.3 | 4.8 | 64.7 | A | A | 7.5 | 48.6 | 57.8 | 46.9 | 33.9 | 43.8 | 29.4 | 42.2 | |
| IV-7 | 14 | R | 6.2 | 53.4 | 18.1 | 54.8 | 4.6 | 43.9 | 15.1 | 42.2 | 22.3 | 40.1 | 14.6 | 43.9 | 10.2 | 33.1 |
| 14 | L | 7.3 | 54.5 | 16.2 | 60.5 | 5.9 | 37.7 | 12.1 | 38.6 | 22.0 | 43.4 | 15.9 | 37.7 | 12.9 | 34.8 | |
| 15 | R | 7.0 | 52.2 | 17.8 | 52.4 | 3.7 | 41.5 | 13.2 | 44.7 | 26.1 | 41.7 | 8.4 | 37.9 | 11.4 | 35.3 | |
| 15 | L | 8.4 | 55.3 | 17.8 | 53.7 | 5.1 | 37.5 | 14.1 | 38.4 | 19.2 | 40.5 | 13.4 | 38.6 | 11.9 | 38.2 | |
| IV-8 | 11 | R | 6.5 | 57.2 | 6.3 | 54.7 | 0.3 | 44.2 | 14.7 | 49.3 | 31.8 | 41.7 | 34.6 | 38.8 | 27.2 | 40.5 |
| 11 | L | 8.1 | 56.1 | 4.5 | 58.1 | 0.2 | 46.9 | 10.8 | 48.0 | 45.1 | 41.7 | 32.4 | 41.7 | 28.6 | 41.7 | |
| IV-9 | 18 | R | 15.4 | 63.2 | 10.0 | 60.8 | 3.4 | 47.8 | 8.2 | 47.3 | 55.0 | 40.4 | 35.3 | 39.5 | 29.4 | 36.6 |
| 18 | L | 11.5 | 58.3 | 14.0 | 63.6 | 4.6 | 45.1 | 8.0 | 47.9 | 53.7 | 43.0 | 26.1 | 40.3 | 31.6 | 33.4 | |
| IV-10 | 16 | R | 12.3 | 60.8 | 11.6 | 66.2 | 0.2 | 47.6 | 7.0 | 48.6 | 27.0 | 42.3 | 15.7 | 43.1 | 27.6 | 45.5 |
| 16 | L | 14.7 | 64.7 | 10.6 | 67.5 | 0.6 | 48.6 | 7.1 | 47.2 | 41.2 | 43.5 | 32.4 | 41.7 | 30.5 | 47.8 | |
| IV-11 | 15 | R | 10.6 | 56.3 | 14.5 | 62.1 | 2.9 | 49.2 | 14.6 | 47.8 | 30.9 | 40.4 | 19.7 | 39.5 | 18.1 | 35.5 |
| 15 | L | 10.5 | 64.3 | 13.9 | 62.9 | 3.3 | 45.7 | 12.7 | 45.7 | 30.0 | 41.7 | 20.7 | 39.5 | 21.5 | 37.2 | |
| IV-13 | 15 | R | 7.8 | 53.0 | 5.4 | 53.7 | A | A | 14.7 | 45.1 | 31.9 | 37.8 | 18.0 | 33.1 | 24.1 | 38.5 |
| 15 | L | 5.2 | 55.3 | 4.1 | 57.9 | A | A | 10.5 | 46.2 | 35.0 | 36.9 | 17.9 | 35.7 | 26.7 | 38.2 | |
| IV-14 | 11 | R | 9.1 | 52.9 | 11.4 | 56.1 | 2.1 | 42.9 | 12.5 | 43.8 | 31.5 | 40.4 | 22.4 | 39.4 | 14.3 | 36.0 |
| 11 | L | 10.6 | 56.1 | 6.9 | 57.3 | 1.6 | 42.8 | 15.0 | 43.4 | 31.5 | 41.7 | 20.4 | 40.3 | 17.2 | 36.8 | |
Boldface represents abnormal values. A = absent response; Age = age at examination; Amp = amplitude (motor: by mV; sensory: by μV). CV = conduction velocity (m/s); R/L = right/left. Normal CVs: motor median ≥ 50.5, ulnar ≥ 51.1, peroneal ≥ 41.2, tibial ≥ 41.1, sensory median ≥ 39.3, ulnar ≥ 37.5, and sural ≥ 32.1. Normal amplitudes: motor median ≥ 6; ulnar ≥ 8, peroneal ≥ 6, tibial ≥ 6, sensory median ≥ 8, ulnar ≥ 7.9, and sural ≥ 6.0.