Summary of the motor NCS values in the upper and lower limbs.
| Nerve | n | Amplitude (mV) | DML (ms) | Conduction velocity (m/s) | % Amplitude drop in forearm or leg | % Amplitude drop across elbow or FH |
|---|---|---|---|---|---|---|
| Mean±SD (range) | ||||||
| Median motor | 119 | 11.5±2.4 (7.0 – 18.8) | 3.0±0.36 (2.2 – 3.8) | 57.8±4.1 (50 – 72) | 6.1±6.1 (0.0 – 31.4) | ___ |
| Ulnar motor | 119 | 10.0±1.6 (7.0 – 15.9) | 2.6±0.33 (1.4 – 3.5) | 60.6±4.6 (49 – 71)* | 7.0±4.8 (0.0 – 23.8)† | 3.1±3.5 (0.0 – 16.3)† |
| Tibial motor | 134 | 13.3±3.5 (4.6 – 22.8) | 3.8±0.7 (2.2 – 5.9) | 50.1±5.7 (35 – 64) | 28.7±13.5 (0.0 – 74.8) | ___ |
| Fibular motor | 134 | 5.2±1.9 (1.1 – 12.3) | 3.9±0.6 (2.0 – 5.5) | 49.5±4.9 (36 – 69)‡ | 11.1±7.9 (0.0 – 43.9) | 1.4±5.3 (0.0 – 22.5) |
↵* Ulnar motor conduction velocity across the elbow was 69.5±8.0 (52 – 91) m/s, † Two participants with Martin-Gruber anastomosis were excluded, ‡ Fibular motor conduction velocity across fibular head was 58.7±9.1 (38 – 90) m/s, No absent responses. DML - distal motor latency, D2 - index finger, D4 - ring finger, D5 - little finger, FH - fibular head