Somatosensory evoked potentials in SCD
| Patient | Neuropathy | Before and after substitution with Vitamin B12 | ||||||
|---|---|---|---|---|---|---|---|---|
| Median nerve SEPs | Tibial nerve SEPs | |||||||
| N9 (ms) | N13 (ms) | N20 (ms) | N22 (ms) | P37 (ms) | ||||
| A | Right | Demyelinating | 11.1 (10.5) | 20.4 (16.5) | 26.1 (21.6) | NR (NR) | 49.2 (46.2) | |
| Left | Demyelinating | 11.1 (10.2) | 19.5 (16.8) | 27.3 (22.2) | NR (NR) | 53.4 (55.2) | ||
| B | Right | No | 9.6 (ND) | 15.9 (ND) | 21 (ND) | NR (NR) | 46 (52.8) | |
| Left | No | 10.8 (ND) | 15.9 (ND) | 20.7 (ND) | NR (NR) | 54 (53.4) | ||
| C | Right | No | 11.6 (10.5) | NR (15.3) | 24.8 (21) | NR (NR) | 48.8 (51) | |
| Left | No | 12.8 (10.5) | NR (NR) | 24 (21) | NR (25.8) | 65 (58.2) | ||
| D | Right | Mild axonal | 10.8 (ND) | 14.6 (ND) | 21 (ND) | 22 (NR) | 54 (51) | |
| Left | Mild axonal | 10.6 (ND) | NR (ND) | 21.4 (ND) | 22 (NR) | 50 (48.6) | ||
| E | Right | Mild axonal | NR (NR) | 15.9 (NR) | 21.6 (21) | NR (NR) | 55 (47.4) | |
| Left | Mild axonal | NR (NR) | 15.3 (16.5) | 21.6 (22.2) | NR (NR) | 49.8 (49.2) | ||
| F | Right | No | 9.7 (8.4) | NR (12) | 21.6 (18.9) | NR (18.6) | 61.6 (40.8) | |
| Left | No | 9.8 (8.4) | NR (12.3) | 20.8 (18.9) | NR (18.6) | 58.8 (40.2) | ||
| G | Right | No | NR (ND) | 14.7 (ND) | 22.2 (ND) | NR (NR) | 48 (47.3) | |
| Left | No | 10.5 (ND) | 14.7 (ND) | 22.2 (ND) | NR (NR) | 48 (49.6) | ||
| H2-150 | Right | Axonal | 12.3 | 16.2 | 23.4 | 28.2 | 55.2 | |
| Left | Axonal | 11.7 | 17.1 | 23.5 | 28.2 | 56.4 | ||
| I2-150 | Right | Axonal | ND | 18.4 | 23.6 | NR | 55.2 | |
| Left | Axonal | ND | 17.6 | 23.2 | NR | 49.8 | ||
↵2-150 Patients H and I died of unrelated diseases before follow up examination could be performed
Numbers in parenthises represent latencies after treatment. NR=no response; ND=not done.