Table 1.
Summary of electroneurographic findings by the time of first investigation
| MCS | ||||||
|---|---|---|---|---|---|---|
| Nerve‐rec. site stim. site | M‐lat. (ms) | M ampl. (mV) | M dur. (ms) | M Shape | CV (m/s) | F Wave |
| R ulnar‐ADM | ||||||
| Wrist | 13.2 | 6.5 | 16.3 | P | 15.2 | NR |
| Elbow | 23.7 | 4.0 | 41.6 | MP | 34.6 | |
| Axilla | 26.9 | 1.3 | 47.9 | MP | 22.9 | |
| Erb | 37.4 | 1.1 | 62.3 | MP | ||
| L median‐ABP | ||||||
| Wrist | 11.6 | 8.2 | 12.4 | P | 24.3 | NR |
| Elbow | 19.4 | 3.9 | 15.9 | P | 14.6 | |
| Axilla | 26.2 | 2.1 | 38.7 | MP | 32.1 | |
| Erb | 31.8 | 1.7 | 49.5 | MP | ||
| R peroneal‐EDB | ||||||
| Ankle | 22.2 | 0.8 | 15.7 | P | 12.0 | NR |
| Fib‐head | 45.0 | 0.6 | 18.9 | P | ||
| R peroneal‐TA | ||||||
| Below Fib‐head | 7.9 | 4.1 | 19.3 | P | 33.1 | NR |
| Above Fib‐head | 10.9 | 3.9 | 26.5 | P | ||
| L femoral‐VM | ||||||
| Ing‐ligam | 41.3 | 2.9 | 47.4 | MP | — | — |
| L tibial‐ABH | ||||||
| Ankle | 16.8 | 4.9 | 28.5 | MP | 19.0 | NR |
| Knee | 32.0 | 1.7 | 49.3 | MP | ||
| SCS | ||||||
| L & R sural, peroneal, median, ulnar and radial nerves: NR in all tested nerves | ||||||
Because of the polyphasic shape of most of the recorded potentials, M amplitude is calculated from maximal negative to maximal positive peak; M duration is calculated from onset of first negative peak to return to baseline of last negative peak.
R, right; L, left; MCS, motor conduction studies; stim, stimulation; M, compound muscle action potential; lat, latency; ampl, amplitude; dur, duration; ADM, abductor digiti minimi; ABP, abductor pollicis brevis; EDB, extensor digitorum brevis; TA, tibialis anterior; fib, fibular; VM, vastus medialis; ABH, abductor hallucis; P, polyphasic; MP, markedly polyphasic; NR, no response; SCS, sensory conduction studies.