Table 1
Patients’ clinical data.
| PATIENT | AGE | SEX | GROUP | HANDEDNESS | SITE TESTED | TREMOR | DYSMETRIA | POWER | SENSATION |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 51 | F | C | L | R | 0 | 0 | N | I |
| 2 | 59 | F | C | R | R | 0 | 0 | N | N |
| 3 | 61 | F | C | R | R | 0 | 0 | N | N |
| 4 | 40 | M | C | L | L | 0.5 | 0 | N | N |
| 5 | 42 | F | C | L | L | 0.5 | 0 | N | N |
| 6 | 53 | M | C | R | R | 0.5 | 0 | N | N |
| 7 | 66 | M | C | R | R | 0 | 0.5 | N | N |
| 8 | 45 | M | T | L | L | 1.5 | 0 | N | N |
| 9 | 35 | F | T | R | L | 4.5 | 1 | N | N |
| 10 | 36 | F | T | R | R | 3 | 1 | N | I |
| 11 | 55 | F | T | R | L | 1.5 | 0 | N | I |
| 12 | 39 | F | T | R | R | 0 | 1 | N | I |
| 13 | 36 | M | T | L | R | 3.5 | 1 | N | I |
| 14 | 31 | M | D | R | R | 0 | 1 | N | I |
| 15 | 31 | F | D | R | L | 0 | 2 | 4/5 | I |
| 16 | 33 | M | D | R | L | 0 | 2 | N | I |
| 17 | 36 | M | D | R | R | 0 | 2 | N | I |
| 18 | 51 | M | M | R | R | 5 | 2 | 4/5 | I |
| 19 | 56 | M | M | L | L | 7 | 1 | N | I |
| 20 | 37 | M | M | R | L | 2.5 | 2 | N | N |
| 21 | 52 | M | M | R | R | 1.5 | 1 | N | I |
| 22 | 22 | M | M | R | R | 2 | 1 | N | N |
| 23 | 58 | M | C | R | R | 0.5 | 0 | N | I |
[i] C = MS control group; T = MS tremor group; D = MS dysmetria group; M = MS mixed group; N = normal; I = impaired.
Figure 1
A. Onset latency of the sensory evoked potentials recorded at Erbs point, cervical spinal cord and cortex and the central sensory conduction times (CSCT) for each MS subgroup. The boxes show the 75th and 25th percentiles and median, the open box shows the mean value and data points with an X show the maximum and minimum values. B. Same data as in A, but the groups have been combined into those with dysmetria (red) and without dysmetria (black). NS = no significant difference between groups.
Table 2
SEPs latencies for the four groups.
| PATIENT | GROUP | ERB’S POINT (LATENCIES, ms) | CERVICAL SPINE (LATENCIES, ms) | CEREBRAL CORTEX (LATENCIES, ms) | CENTRAL CONDUCTION TIMES (ms) |
|---|---|---|---|---|---|
| 1 | C | 8.0 | 11.5 | 17.75 | 6.25 |
| 2 | C | 9.25 | 12.75 | 17.75 | 5 |
| 3 | C | 10.25 | 13.25 | 19.5 | 6.25 |
| 4 | C | 8.75 | 14.25 | 22.25 | 8 |
| 5 | C | 8.75 | 11.5 | 20.5 | 9 |
| 6 | C | 10.0 | 15.25 | 23.75 | 8.5 |
| 7 | C | 10.75 | 13.5 | 21.5 | 8 |
| 8 | T | 10.0 | 14.25 | 20.0 | 5.75 |
| 9 | T | 9.5 | 12.75 | 21.25 | 8.5 |
| 10 | T | 8.5 | 12.75 | 18.25 | 5.5 |
| 11 | T | 10.25 | 14.5 | 19.75 | 5.25 |
| 12 | T | 8.5 | 12.25 | 19.25 | 7 |
| 13 | T | 10.25 | 16.0 | 24.25 | 8.25 |
| 14 | D | 9.25 | 13.0 | 22.75 | 9.75 |
| 15 | D | 9.0 | 14.0 | 23.0 | 9 |
| 16 | D | 9.25 | 13.75 | 20.0 | 6.25 |
| 17 | D | 9.25 | 13.5 | 29.75 | 16.25 |
| 18 | M | 10.25 | 14.25 | 22.5 | 8.25 |
| 19 | M | 10.5 | 13.5 | 20.75 | 7.25 |
| 20 | M | 11 | 14.75 | 24.75 | 10 |
| 21 | M | 9.5 | 12.25 | 18.75 | 6.5 |
| 22 | M | 10 | 13.75 | 22.25 | 8.5 |
[i] C = patients controls; T = tremor group; D = dysmetria group; M = mixed group (one patient could not tolerate the test).
Figure 2
Onset latencies of the short-latency (M1) and long-latency (M2) components of the stretch reflex. Data are shown for each preload (load 1, 2 and 3) condition. The MS groups have been combined into those with dysmetria (red) and without dysmetria (black). * = p < 0.008.