<unk> , more colloquially referred to as flapping tremor, is a tremor of the hand when the wrist is extended, sometimes said to resemble a bird flapping its wings. This motor 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. The tremor is caused by abnormal function of the diencephalic motor centers in the brain, which regulate the muscles involved in maintaining position.<unk>  is associated with various encephalopathies due especially to faulty metabolism. The term derives from the Greek a, "not" and stērixis, "fixed position".<unk>  is the inability to maintain posture due to a metabolic encephalopathy. This can be elicited on physical exam by having the patient extend their arms and bend their hands back. With a metabolic encephalopathy, the patient is unable to hold their hands back resulting in a “flapping” motion consistent with<unk> . It can be seen in any metabolic encephalopathy e.g. chronic kidney failure, severe congestive heart failure, acute respiratory failure and commonly in decompensated liver failure.
Asterixis
Hypertonia
Myotonia
Paresthesia
Dysosmia
Dysuria
Paresis
Oscillopsia