Intermittent bilateral coherence in physiological and essential hand tremor

Physiological tremor and many of the pathological tremors typically occur in limbs on both the sides of the body, with similar fundamental frequency of the oscillation. This raises the possibility that the contralateral tremors may have a common source or are otherwise coupled. To confirm such coupling, however, it is necessary to systematically assess the dependence of the two tremor oscillations. This is commonly done by coherence analysis, which has been used in the previous literature to quantify kinematic (Marsden et al.

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