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Fig. 2 | Journal of NeuroEngineering and Rehabilitation

Fig. 2

From: Contribution of inter-muscular synchronization in the modulation of tremor intensity in Parkinson’s disease

Fig. 2

The sEMG and joint angle trajectory during Parkinsonian tremor recorded from PD subject P9. a The sEMG of 6 muscles are shown in the left column, and the corresponding spectra are shown in the right column. The EMGs show similar rhythms of spontaneous oscillatory activities across all muscles, and all the spectra show similar two major components at single and double tremor frequencies. b Oscillations in elbow (flexion) and shoulder (flexion, abduction, and rotation) joints are demonstrated in the left column, and the corresponding spectra are presented in the right column. Joint trajectory spectra show a single component at the tremor frequency

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