Descriptive statistics of normal controls
| Parameters | No | Minimum | Maximum | Mean | SD |
| MUPs at rest: | |||||
| Amplitude (uV) | 100 | 276.0 | 1006.0 | 534.5 | 166.5 |
| Duration (ms) | 100 | 4.0 | 9.5 | 6.5 | 1.4 |
| Area (μV/ms) | 100 | 188.0 | 976.0 | 474.9 | 198.0 |
| Poly (%) | 100 | 0.0 | 45.0 | 22.6 | 11.7 |
| No MUP | 22 | 3.0 | 5.5 | 3.5 | 0.7 |
| FD | 90 | 1.2 | 2.2 | 1.7 | 0.2 |
| Interference patterns: | |||||
| Activity (%) | 100 | 4.0 | 30.0 | 11.7 | 6.3 |
| NSS/s | 100 | 56.0 | 526.0 | 140.5 | 77.2 |
| Envelope (μV) | 100 | 343.0 | 2878.0 | 1367.2 | 507.5 |
MUP=Muscle unit potential; Poly=polyphasic potentials; FD=fibre density; NSS=number of short segments. See text for further explanation.