Table 3.
Single-pulse and paired-pulse motor-evoked potentials (MEP) and short-interval intracortical inhibition (SICI) from different submaximal torque levels in the high and low visuomotor feedback tasks from the right arm biceps brachii muscle.
| High visuomotor feedback | Low visuomotor feedback | |||||
|---|---|---|---|---|---|---|
| 5% MVC | 20% MVC | 40% MVC | 5% MVC | 20% MVC | 40% MVC | |
| PEAK TO PEAK | ||||||
| Paired-pulse MEP [% MMAX] | 5.6 (±2.6) | 18.1 (±14.2)a | 35.0 (±21.8)a,b | 6.2 (±3.1) | 17.4 (±13.8)a | 33.6 (±21.2)a,b |
| Single-pulse MEP [% MMAX] | 17.8 (±10.7) | 40.4 (±23.5)a | 57.8 (±30.7)a,b | 16.6 (±9.4) | 39.7 (±28.2)a | 59.6 (±31.9)a,b |
| Inhibition [Paired-pulse % of single-pulse] | 38.7 (±21.3) | 43.8 (±12.5) | 62.7 (±24.7)a,b | 39.6 (±8.2) | 46.7 (±13.0)a | 59.7 (±21.4)a,b |
| RMS | ||||||
| Paired-pulse MEP [% MMAX] | 4.3 (±1.9) | 13.8 (±10.7)a | 27.0 (±17.3)a,b | 4.8 (±2.5) | 13.1 (±10.4)a | 25.3 (±16.4)a,b |
| Single-pulse MEP [% MMAX] | 14.3 (±9.0) | 31.9 (±18.7)a | 45.5 (±26.5)a,b | 13.6 (±8.5) | 31.3 (±22.8)a | 47.6 (±27.4)a,b |
| Inhibition [Paired-pulse % of single-pulse] | 38.8 (±22.7) | 42.5 (±12.2) | 62.1 (±23.7)a,b | 39.8 (±10.9) | 45.1 (±12.7) | 56.6 (±19.5)a,b |
Further details of statistical comparisons given in text.
Repeated measures multivariate analysis of variance (MANOVA) indicated that there was no task x torque level interaction. Torque levels differed from each other. For RMS the repeated measures MANOVA indicated a difference between tasks, whereas not for peatk to peak.
a
p ≤ 0.05 compared to 5% MVC;
b
p ≤ 0.05 compared to 20% MVC.