asterixis

asterixis /as·ter·ix·is/ (as?ter-ik´sis) a motor disturbance marked by intermittent lapses of an assumed posture as a result of intermittency of sustained contraction of groups of muscles; called liver flap because of its occurrence in hepatic coma, but observed also in other conditions.

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as·ter·ix·is (st-rkss)

n.

An abnormal tremor consisting of involuntary jerking movements, especially in the hands, frequently occurring with impending hepatic coma and other forms of metabolic encephalopathy. Also called flapping tremor.

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asterixis Flapping tremor Neurology An exaggerated muscle tremor characterized by involuntary jerking of the hand in flexion and extension, classically seen in advanced liver disease and hepatic encephalopathy