Table 1

Abductor pollicis brevis and extensor digitorum brevis and mean motor unit number estimates (MUNE)

Abductor pollicis brevisExtensor digitorum brevis
NoMUNE (range)NoMUNE (range)
SOD1, Cu, Zn superoxide dismutase 1.
Population controls23148 (115–254)12138 (119–169)
SOD1 negative family controls34138 (106–198)32134 (107–180)
SOD1 mutation carriers19144 (109–199)14136 (111–187)
Patients with sporadic ALS1245 (5–84)970 (8–82)