Table 1.
The table lists demographic and electrophysiological data (mean ± SEM)
| All participants (n = 24) | Caudal hotspot group (n = 10) | Rostral hotspot group (n = 14) | Statistic, p value | |
|---|---|---|---|---|
| Sex (male/female) | 12/12 | 5/5 | 7/7 | χ2 = 0, p = 1 |
| Age (years) | 24.2 ± 0.9 | 22.6 ± 1.1 | 25.4 ± 1.3 | t(22) = −1.699, p = 0.11 |
| Height (cm) | 172.9 ± 6.0 | 171.5 ± 4.7 | 173.9 ± 6.8 | t(22) = −1.004, p = 0.326 |
| RMT of FDI muscle (%MSO) | 58.1 ± 2.2 | 55.3 ± 2.4 | 60.1 ± 3.4 | t(21.6) = −1.144, p = 0.27 |
| MEP latency at hotspot (ms) | ||||
| Left FDI muscle | 22.6 ± 0.3 | 21.7 ± 0.4 | 23.3 ± 0.4 | t(20.9) = −2.952, p = 0.008 |
| Left ADM muscle | 22.9 ± 0.3 | 22.0 ± 0.4 | 23.5 ± 0.4 | t(21.1) = −3.033, p = 0.006 |
| MEP amplitude at hotspot (mV) | ||||
| Left FDI muscle | 1.1 ± 0.2 | 1.3 ± 0.3 | 1.0 ± 0.2 | t(14.46) = 0.804, p = 0.43 |
| Left ADM muscle | 0.5 ± 0.1 | 0.4 ± 0.1 | 0.6 ± 0.1 | t(21.6) = −0.682, p = 0.5 |
| MNI coordinates of motor hotspot | ||||
| Left FDI muscle (x-coordinate) | 38.7 ± 0.6 | 39.4 ± 1.0 | 38.1 ± 0.8 | t(19.1) = 1.02, p = 0.32 |
| Left FDI muscle (y-coordinate) | −16.6 ± 1.0 | −21.3 ± 1.2 | −13.2 ± 0.6 | t(13) = −6.11, p < 0.001 |
| Left FDI muscle (z-coordinate) | 66.5 ± 0.6 | 65.2 ± 0.9 | 67.4 ± 0.7 | t(16) = −1.873, p = 0.08 |
| Left ADM muscle (x-coordinate) | 35.4 ± 1.2 | 35.8 ± 2.4 | 35.1 ± 1.3 | t(14.35) = 0.269, p = 0.79 |
| Left ADM muscle (y-coordinate) | −17.8 ± 1.1 | −21.7 ± 1.4 | −15.0 ± 1.0 | t(16.7) = −3.85, p = 0.001 |
| Left ADM muscle (z-coordinate) | 69.1 ± 1.0 | 67.8 ± 1.6 | 70.1 ± 1.3 | t(18.8) = −1.113, p = 0.28 |
| Spatiotemporal rostrality index | ||||
| Left FDI muscle | 0.34 ± 0.05 | 0.14 ± 0.03 | 0.49 ± 0.05 | t(15.6) = −6.568, p < 0.001 |
| Left ADM muscle | 0.32 ± 0.04 | 0.18 ± 0.03 | 0.42 ± 0.05 | t(16.7) = −3.850, p < 0.001 |
%MSO, percentage of maximum stimulation output. The p values refer to between-group comparisons of the mean values of variables (caudal hotspot group vs rostral hotspot group).