Essential tremor is a neurodegenerative disorder that manifests chiefly with tremor. Incidence increases with age, but there is a cohort of patients who experience mild tremor of both hands for example when holding a piece of paper even in their teenage years or twenties. As people age, the tremor amplitude increases and tremor frequency typically becomes slower. The tremor of essential tremor usually affects both arms and causes a tremor with posture (outstretched hands) and when performing activities, such as handwriting. Some patients also report head tremor which can be in a side to side (no/no) or up and down (yes/yes) direction. There can also be a rest tremor of the hands seen when the forearms are �resting� �on an armrest. Patients with essential tremor may also report problems with balance.
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