[Abstract Title]. - Society for Neuroscience

of the force (force smoothness) was observed in the stroke patients.
CONCLUSIONS: The lower coherence between signals of the ATD and TB during reaching in
stroke suggests weakening of functional coupling between the two synergists. This could be
contributed by a loss of common drive at the frequency band as a result of stroke-induced
interruption of the corticospinal network involved in controlling the movement. The significant
correlation between the coherence and force variation suggests that the coherence is functionally
relevant. Weakening of functional coupling between synergist muscles may be an important
mechanism underlying poor motor performance in patients post stroke.
Coherence between EMGs of anterior deltoid and triceps brachii at the frequency range 0-25Hz
Group 0-4Hz 4-8Hz 8-13Hz 13-25Hz
Control 0.287±0.065* 0.267±0.049* 0.190±0.023* 0.133±0.022
Stroke 0.203±0.077 0.194±0.061 0.161±0.031 0.140±0.030
* P