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Asterixis (more colloquially referred to as flapping tremor) is not actually a tremor, but rather a negative myoclonus.This movement disorder is characterized by an inability to maintain a position, which is demonstrated by jerking movements of the outstretched hands when bent upward at the wrist (which can be similar to a bird flapping its wings, hence the name "flapping tremor").
A classic symptom is a characteristic fine tremor in the hands, which is traditionally described as a "pill-rolling" action of the hands, [3] but Parkinsonian tremor may also affect the arms, chin, lips, legs, and trunk, and can be markedly increased by stress or emotion. Onset is generally after age 60.
ET typically affects the hands and arms but can also affect the head, voice, chin, trunk and legs. Both sides of the body tend to be equally affected. The tremor is called an action tremor, becoming noticeable in the arms when they are being used. Patients often report that alcohol helps lessen the symptoms.
Tremors can start at any age, from birth through advanced ages (senile tremor). [62] [63] Any voluntary muscle in the body may be affected, although the tremor is most commonly seen in the hands and arms and slightly less commonly in the neck (causing the person's head to shake), tongue, and legs. A resting tremor of the hands is sometimes present.
Unusual movements including fine tremors, jerky limb movements, hand flapping and a wide-based, stiff-legged gait. Characteristic facial appearance (but not in all cases). A history of epilepsy and an abnormal EEG tracing. A happy disposition with frequent laughter
Tremor (usually fine shaking; tremor of the outstretched fingers). In a small study of newly diagnosed hyperthyroid patients, tremor was observed in 76% of them. [7] Some studies lay the cause for hyperthyroid tremor with a heightened beta-adrenergic state, others suggest an increased metabolism of dopamine. [8] [9]
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Tremor and Other Hyperkinetic Movements is a peer-reviewed open access medical journal covering neurology with a focus on hyperkinetic movement disorders including ...