Table 1.
Neurophysiological Findings at 11 Years of Age.
| Right | Normal a | |
|---|---|---|
| MOTOR: | ||
| Median nerve | ||
| DML (ms) wrist (to APB) | 5.0 | < 4.9 |
| CMAP (mV) wrist/elbow | 4.4/4.3 | > 5.7 |
| CV (m/s) | 43 | > 51 |
| Ulnar nerve | ||
| DML (ms); wrist (to ADM) | 4.8 | < 3.1 |
| CMAP (mV) wrist/b-elbow/a-elbow | 0.6/0.6/0.7 | > 7.0 |
| CV (m/s) | 37 | > 54 |
| Tibial nerve | ||
| DML (ms; ankle-AH) | 4.8 | < 5.6 |
| CMAP (mV) ankle/knee | 1.8/1.3 | > 6.2 |
| CV (m/s) | 40 | > 45 |
| Peroneal nerve | ||
| DML (ms; ankle-EDB) | 4.1 | < 5.6 |
| CMAP (mV) | 0.2/0.6/0.5 | > 2.6 |
| CV (m/s) | 21 | > 45 |
| SENSORY: | ||
| Median nerve | ||
| PL (ms; wrist-digitII) | 3.8 | < 3.4 |
| SNAP (μV) | 11.1 | > 28 |
| CV (m/s) | 41 | > 58 |
| Ulnar nerve | ||
| PL (ms; wrist-digitV) | 3.4 | < 3.1 |
| SNAP (μV) | 4.5 | > 24 |
| CV (m/s) | 38 | >57 |
| Sural nerve | ||
| PL (ms; calf-latmall) | < 4.2 | |
| SNAP (μV) | NR | > 9 |
| CV (m/s) | < 43 | |
| Peroneal nerve | ||
| PL (ms; anterior | < 4.0 | |
| SNAP | NR | > 5 |
| CV (m/s) | < 40 |
Bold values are abnormal. All sensory responses are antidromic.
Abbreviations: NR, no response; DML, distal onset motor latency; CMAP, compound motor action potential; CV, conduction velocity; PL, peak onset latency; APB, abductor pollicus brevis; ADM, abductor digiti minimi; AH, abductor hallicus; EDB, extensor digitorum brevis; b-elbow, below elbow; a-elbow, above elbow.
a
Normal values from Ryan et al. 2019 11 except peroneal nerve sensory normal values obtained from our laboratory.