Task-specific modulation of intramuscular coherence
The TW task induced increased intramuscular coherence compared to NW in the high-frequency band (15–55 Hz) for all walking speeds. This result is in line with previously published studies (Zipser-Mohammadzada et al. The increase of intramuscular coherence during TW compared to NW was also observed for the low-frequency band (5–14 Hz) across walking speeds of 0.5 m/s, 0.9 m/s, and preferred speed. These results suggest that the TW task is associated with enhanced overall synchronicity of contributing neural networks during voluntary gait control. This is observed irrespective of speed within a certain range (Zipser-Mohammadzada et al. The results presented here imply that the increase of intramuscular coherence during TW cannot be accounted for by a change in walking speed. Furthermore, the lack of significant intramuscular coherence differences between sessions for all tasks in NW and TW suggests that there were no learning effects.