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A tremor is an involuntary, [1] somewhat rhythmic muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs. Most tremors occur in the hands.
Tremors of this disease occur at frequencies of 2–4 Hz or more. [8] Intention tremor is also known to be associated with infections, such as West Nile virus, rubella, H. influenza, rabies, and varicella. [1] [9] A variety of poisons have been shown to cause intention tremor, including mercury, methyl bromide, and phosphine.
Essential tremor; Other names: Idiopathic tremor: Archimedean spiral drawings by a man with a unilateral essential tremor. The spiral on the left was drawn by the subject using the left hand, and the one on the right using the right hand. Specialty: Neurology: Usual onset: Any age, but typically after 40: Causes: Unknown: Risk factors
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").
Dyskinesia can be anything from a slight tremor of the hands to an uncontrollable movement of the upper body or lower extremities. Discoordination can also occur internally especially with the respiratory muscles and it often goes unrecognized. [3] Dyskinesia is a symptom of several medical disorders that are distinguished by their underlying ...
Essential tremor: 333.1 G25.0 Drug induced tremor G25.1 Other specified form of tremor G25.2 Myoclonus: 333.2 G25.3 Chorea (rapid, involuntary movement) Drug induced chorea: G25.4 Drug-induced tics and tics of organic origin 333.3 G25.6 Paroxysmal nocturnal limb movement G25.80 Painful legs (or arms), moving toes (or fingers) syndrome G25.81
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