Table 1.
Changes in F-wave and H-reflex variables over time in both experimental conditions (anodal and cathodal stimulation)
| F Wave |
H Reflex Soleus |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| AH |
ADM |
|||||||||
| Minimal latency, ms | Mean latency, ms | Dispersion, ms | Minimal latency, ms | Mean latency, ms | Dispersion, ms | Threshold, ms | Latency, ms | Area, mVms | Ratio H/M | |
| Anodal | ||||||||||
| B | 46.4 ± 1.3 | 48.2 ± 1.5 | 4.3 ± 0.6 | 25.8 ± 0.6 | 27.9 ± 0.8 | 2.9 ± 0.5 | 14.7 ± 3.5 | 28.9 ± 1.0 | 7.4 ± 1.0 | 0.4 ± 0.1 |
| T0 | 47.0 ± 1.5 | 49.3 ± 1.4 | 4.3 ± 0.5 | 26.2 ± 1.0 | 27.8 ± 0.8 | 2.8 ± 0.7 | 13.9 ± 2.8 | 28.3 ± 1.3 | 7.1 ± 0.6 | 0.4 ± 0.05 |
| T30 | 47.2 ± 1.4 | 50.5 ± 2.5 | 4.4 ± 0.7 | 26.3 ± 0.9 | 28.3 ± 1.9 | 3.0 ± 0.4 | 13.9 ± 1.8 | 29.3 ± 1.4 | 7.7 ± 0.9 | 0.4 ± 0.13 |
| Cathodal | ||||||||||
| B | 46.3 ± 1.2 | 48.6 ± 1.2 | 4.4 ± 0.5 | 25.3 ± 1.2 | 27.8 ± 1.5 | 3.0 ± 0.7 | 14.1 ± 3.0 | 28.0 ± 1.2 | 7.7 ± 0.6 | 0.4 ± 0.04 |
| T0 | 46.3 ± 1.4 | 48.8 ± 1.7 | 4.7 ± 0.3 | 25.5 ± 1.5 | 28.0 ± 1.0 | 3.1 ± 0.4 | 14.1 ± 2.5 | 27.8 ± 1.3 | 7.6 ± 1.1 | 0.4 ± 0.1 |
| T30 | 47.2 ± 1.6 | 49.1 ± 1.5 | 4.8 ± 0.7 | 26.0 ± 1.1 | 28.3 ± 1.0 | 2.8 ± 0.6 | 13.8 ± 2.7 | 28.9 ± 0.8 | 7.9 ± 1.4 | 0.3 ± 0.3 |
| P value | 0.6 | 0.2 | 0.8 | 0.3 | 0.9 | 0.3 | 0.8 | 0.7 | 0.8 | 0.3 |
Data are means ± SE. We found no significant changes in F-wave and H-reflex variables across the different time points [baseline (B), immediately after transcutaneous spinal direct current stimulation (tsDCS) offset (T0), and at 30 min after tsDCS offset (T30)].
AH, abductor hallucis; ADM, abductor digiti minimi; H/M, maximal H reflex/maximal compound muscle action potential.
P values refer to 2-way repeated-measures ANOVA with stimulation and time as factors (interaction effects).