Mean latency and amplitude values, standard deviations, and significance by t test of median and ulnar nerve somatosensory evoked potentials in patients and control subjects
| HD (mean (SD)) | Controls (mean (SD)) | tTest (p) | ||
|---|---|---|---|---|
| SEP, somatosensory evoked potential. | ||||
| LATENCY (ms) | ||||
| Median nerve SEP | EPP | 10.23 (0.59) | 10.15 (0.34) | >0.05 |
| P9 | 10.69 (0.66) | 10.52 (0.62) | >0.05 | |
| N13 | 13.49 (0.76) | 13.48 (0.45) | >0.05 | |
| P14 | 14.76 (0.62) | 14.75 (0.46) | >0.05 | |
| N20 | 19.81 (0.75) | 19.36 (0.61) | >0.05 | |
| P9-P14 | 4.54 (0.16) | 4.27 (0.15) | >0.05 | |
| P14-N20 | 5.04 (0.18) | 4.61 (0.13) | >0.05 | |
| Ulnar nerve SEP | EPP | 10.89 (0.61) | 10.59 (0.58) | >0.05 |
| P9 | 11.12 (0.68) | 11.09 (0.75) | >0.05 | |
| N13 | 14.35 (0.69) | 13.98 (0.65) | >0.05 | |
| P14 | 15.61 (0.73) | 15.33 (0.71) | >0.05 | |
| N20 | 20.57 (0.72) | 19.98 (0.64) | >0.05 | |
| P9-P14 | 4.47 (0.21) | 4.22 (0.19) | >0.05 | |
| P14-N20 | 4.92 (0.23) | 4.65 (0.21) | >0.05 | |
| AMPLITUDE (μV) | ||||
| Median nerve SEP | EPP | 3.41 (1.57) | 6.21 (1.45) | 0.0002 |
| P9 | 0.64 (0.23) | 1.05 (0.26) | 0.01 | |
| N13 | 0.96 (0.52) | 1.97 (0.42) | 0.00007 | |
| N20 | 2.43 (0.72) | 2.85 (0.62) | >0.05 | |
| Ulnar nerve SEP | EPP | 1.39 (0.62) | 2.67 (0.58) | 0.0004 |
| P9 | 0.36 (0.12) | 0.57 (0.11) | 0.04 | |
| N13 | 0.72 (0.28) | 1.21 (0.19 | 0.0009 | |
| N20 | 1.72 (0.54) | 1.83 (0.34) | >0.05 | |