Table 3.
Electrophysiological parameters in stroke patients.
| Unaffected Hemisphere | Affected Hemisphere | Adjusted p-value Δ | |
|---|---|---|---|
| rMT (%MSO) | 42 [38–48] (26–65) | 50 [42–60] (29–75) | ** |
| Xint (%rMT) | 110 [105–121] (84–146) | 104 [91–108] (74–127) | * |
| IO140 (mV) | 1.71 [0.90–2.77] (0.2–9.5) | 0.32 [0.16–1.63] (0–10.2) | ** |
| MEPmax (mV) | 3.32 [1.80–5.03] (0.3–11.3) | 0.43 [0.19–2.48] (0–10.7) | *** |
| PS (mV/%rMT) | 0.066 [0.035–0.124] (0.010–0.438) | 0.014 [0.048–0.076] (0.001–0.383) | *** |
| AUC (mVx%rMT) | 142.20 [77.54–204.40] (18.2–630.9) | 33.57 [13.07–138.50] (0–571) | *** |
| m (mV/%rMT) | 0.080 [0.060–0.110] (0.030–1.000) | 0.10 [0.07–0.15] (0.040–0.220) | ns |
| S50 (%rMT) | 135 [123–150] (111–184) | 124 [112–134] (94–154) | * |
| R2 | 0.97 [0.95–0.99] (0.71–0.99) | 0.96 [0.94–0.98] (0.71–0.99) | ns |
Results are presented as median [Q1–Q3] (min–max). Q1 and Q3 represent the 25th and 75th percentile. Wilcoxon signed-rank tests were computed between the affected and the unaffected hemispheres in 33 patients with recordable MEP in both hemispheres.
***
p < 0.001,
**
p < 0.01,
*
p < 0.05, ns, not significant; MEP, motor evoked potential; rMT, resting motor threshold; MSO, maximal stimulator output; Xint, X intercept; IO140, Motor Evoked Potentials amplitude recorded at 140% rMT; MEPmax, maximum value of the sigmoid function; PS, peak slope; AUC, area under the input output curve; m, slope; S50, stimulus intensity needed to obtain 50% of the maximum response.