Abstract
Tremor is the most common movement disorder encountered in the clinical practice. A complete study of the tremor should evaluate the circumstances in which it occurs (rest, holding a position against gravity, doing an action), the frequency, amplitude, topography and activation conditions, considering the subjective influence of the emotive and psychological conditions. Neurophysiological investigations can give objective measures to assess tremor in different conditions, and are useful in the differential diagnosis between tremor and other movement disorders (i.e. pseudorhythmic myoclonus) and to evaluate the co-activation in the psychogenic tremor. In our protocol, we use an accelerometer to measure frequency and magnitude of the tremor oscillatory cycles and surface EMG to show whether antagonist muscles are working at the same time (co-contraction) or alternately to produce tremor. However this approach does not assess the impact of the tremor on living activities and the quality of life; therefore, we add to clinical evaluation and neurophysiological tests the Tremor Activities Daily Living Scale and the Quality of Life in Essential Tremor. Preliminary results of our study will be shown.
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