Table 1 The results of nerve conduction study and electromyography at 2Â weeks after the onset
From: Reversible reddish skin color change in a patient with compressive radial neuropathy
Nerve | Stimulation | Latency (msec) | Amp. | Velocity (m/sec) | F-latency (msec) | |
Motor | ||||||
 Lt. radial | Forearm | 1.75 (< 2.0) | 5.9 |  |  | |
Elbow |  | 5.8 | 58.7 (> 49.0) |  | ||
Above | spiral groove |  | 3.9* | 53.5 (> 49.0) |  | |
 Rt. radial | Forearm | 1.64 (< 3.6) | 6.6 |  |  | |
Elbow |  | 6.4 | 57.9 (> 49.0) |  | ||
Above | spiral groove |  | 6.4 | 58.1 (> 49.0) |  | |
 Lt. median | Wrist | 2.88 (< 3.6) | 11.9 (> 5.0) |  | 26.9 | |
Elbow |  | 12.3 | 61.3 (> 50.0) |  | ||
Axilla |  | 12.0 | 67.9 (> 56.0) |  | ||
 Rt. median | Wrist | 3.33 (< 3.6) | 10.9 (> 5.0) |  | 27.7 | |
Elbow |  | 10.3 | 62.5 (> 50.0) |  | ||
Axilla |  | 9.8 | 61.3 (> 50.0) |  | ||
Sensory | ||||||
 Lt. radial | Forearm | 4.27 | 10.8 (> 8.0) | 53.9 (> 50.0) |  | |
 Rt. radial | Forearm | 4.19 | 9.4 (> 8.0) | 54.9 (> 50.0) |  | |
 Lt. median | Digit 2 | 2.48 | 27.2 (> 10.0) | 44.4 (> 41.3) |  | |
 Rt. median | Digit 2 | 2.54 | 21.3 (> 10.0) | 43.3 (> 41.3) |  | |
Electromyography | Spontaneous activity | Voluntary contraction | ||||
Muscle (Left) | Insertional Activity | Fibrillation potentials | Positive sharp waves | Activation | Recruitment pattern | MUP morphology |
EIP | ↑ | + 1 | + 1 | NL | ↓ | NL |
EDC | ↑ | + 2 | + 2 | NL | ↓ | NL |
Extensor carpi radialis | ↑ | + 1 | + 2 | NL | ↓ | NL |
Brachioradialis | ↑ | + 1 | + 1 | NL | ↓ | NL |
Triceps brahii | NL | 0 | 0 | NL | NL | NL |
Deltoid | NL | 0 | 0 | NL | NL | NL |
Biceps brachii | NL | 0 | 0 | NL | NL | NL |
Abductor pollicis brevis | NL | 0 | 0 | NL | NL | NL |
First dorsal interosseous | NL | 0 | 0 | NL | NL | NL |
Cervical paraspinal C5-C7 | NL | 0 | 0 | NL | NL | NL |