Table 2 The ulnar motor nerve parameters in 127 UNE patients (most symptomatic arm)
From: The impact of extended electrodiagnostic studies in Ulnar Neuropathy at the elbow
Motor parameters | Abductor digiti minimi muscle | First dorsal interosseus | ||||
|---|---|---|---|---|---|---|
| Â | Mean (sd) | Range | % abnormal (ref.lim) | Mean (sd) | Range | % abnormal (ref.lim) |
Distal latency (ms) | 3.0 (0.4) | (2.2-4.6) | 7% (3.6) | 3.6 (0.5) | (2.3-5.3) | 6% (4.4) |
Forearm MCV (m/s) | 56 (6) | (36-71) | 21% (52) | 55 (6) | (32-70) | 17% (51) |
Below sulcus (m/s) | 45 (16) | (13-67) | 54% (49) | 45 (14) | (9-67) | 40% (44) |
Above sulcus (m/s) | 44 (14) | (10-70) | 69% (48) | 42 (14) | (10-75) | 62% (45) |
Across sulcus (m/s) | 41 (9) | (11-67) | 80% (49) | 40 (8) | (10-59) | 84% (48) |
Upper arm (m/s) | 62 (7)* | (35-77) | 6% (51) | 62 (7)†| (33-77) | 7% (51) |
F-M (ms) | 26.1 (2.3) | (19.0-33.6) | 31% (27.3) | Â | Â | Â |
Wrist amplitude (mV) | 8.2 (2.4) | (1.0-14.0) | 16% (6.3) | 8.7 (3.8) | (0.2-18.2) | 33% (7.3) |
Below sulcus (mV) | 7.3 (2.5) | (1.0-13.1) | 20% (5.1) | 7.3 (3.7) | (0.1-17.3) | 28% (5.1) |
In sulcus (mV) | 6.8 (2.6) | (0.9-12.9) | 25% (5.3) | 6.7 (3.5) | (0.1-17.1) | 33% (5.2) |
Above sulcus (mV) | 6.0 (2.6) | (0.4-12.7) | 35% (5.2) | 5.8 (3.4) | (0.1-14.7) | 44% (5.1) |
Upper arm (mV) | 5.9 (2.6)‡ | (0.4-11.7) | 34% (5.0) | 5.7 (3.4) | (0.0-14.4) | 56% (6.0) |
Relative amplitude | 0.70 (0.24) | (0.07-1.36) | 30% (0.67) | 0.64 (0.27) | (0.00-1.10) | 34% (0.58) |