Descriptive patient data for the median nerve and the frequency of F wave abnormalities
| Diagnosis | n | Fmin | Fmax | Fmean | Fp | Fc | Total | |
|---|---|---|---|---|---|---|---|---|
| A: | ||||||||
| PNP | 28 | 9 | 8 (0) | 7 (0) | 3 (2) | 2 (0) | 11 | |
| C5/6 | 12 | 2 | — | — | 1 (0) | — | 2 | |
| C7 | 24 | 3 | 3 (2) | — | 1 (1) | 1 (1) | 7 | |
| C8 | 4 | — | — | — | — | — | — | |
| CTS | 93 | 6 | 4 (2) | 1 (0) | 0 (0) | 1 (1) | 9 | |
| MonoN/plexopathy | 20 | 2 | 2 (1) | 1 (0) | 3 (2) | 1 (1) | 6 | |
| Normal subject | 31 | — | 1 (1) | 1 (0) | 1 (1) | 1 (0) | 2 | |
| Total | 222 | 22 | 18 (6) | 10 (0) | 9 (6) | 6 (3) | 37 | |
| B: | ||||||||
| PNP | 10 | 1 | 1 (0) | 0 (0) | 3 (3) | 0 (0) | 4 | |
| C5/6 | 9 | — | — | — | 1 (1) | — | 1 | |
| C7 | 14 | — | 2 (2) | 0 (0) | 1 (1) | 1 (0) | 3 | |
| C8 | 2 | — | — | — | — | — | — | |
| CTS | 32 | 1 | 1 (1) | — | — | 1 (0) | 2 | |
| MonoN/plexopathy† | 11 | — | 1 (1) | 0 (0) | 2 (2) | 1 (0) | 3 | |
| Normal subject | 31 | — | 1 (1) | 1 (0) | 1 (1) | 1 (0) | 2 | |
| Total | 109 | 2 | 6 (5) | 1 (0) | 8 (8) | 4 (0) | 15 |
The figures in parentheses are the number of patients in each column that could be classified as abnormal by analysis of the parameter in question, but not by Fmin (the number of patients that could be detected additionally). PNP=polyneuropathy; C5, C6, C7, C8=radiculopathy C5, C6, C7, C8.; CTS=carpal tunnel syndrome; MonoN=mononeuropathies of the median nerve besides CTS; plexopathy†=plexopathies with upper trunk involvement and normal conduction in the median nerve.