tremor AE asterixis AE Asterixis AE is a tremor AE that also called the flapping tremor, or liver flap, which 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 actively 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. WEB: http://en.wikipedia.org/wiki/Asterixis MedDRA: 10003547 扑翼样震颤 JX, LW, YH