Abductor pollicis brevis and extensor digitorum brevis and mean motor unit number estimates (MUNE)
| Abductor pollicis brevis | Extensor digitorum brevis | |||
|---|---|---|---|---|
| No | MUNE (range) | No | MUNE (range) | |
| SOD1, Cu, Zn superoxide dismutase 1. | ||||
| Population controls | 23 | 148 (115–254) | 12 | 138 (119–169) |
| SOD1 negative family controls | 34 | 138 (106–198) | 32 | 134 (107–180) |
| SOD1 mutation carriers | 19 | 144 (109–199) | 14 | 136 (111–187) |
| Patients with sporadic ALS | 12 | 45 (5–84) | 9 | 70 (8–82) |