Mirrored EMG activity during unimanual rhythmic movements

We studied instances of mirror movements--in the form of coherent EMG activity of the muscles in the arm not intended to move--during the performance of a unimanual rhythmic task in healthy adults. Epochs of involuntary muscle activity were detected and analyzed using time-resolved spectral methods. The observed frequency and phase locking between EMG patterns derived from homologous extensor muscles indicated the presence of neural cross-talk, which is relevant to the study of interlimb coordination.

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