Stiffness and myokymia are present at rest and increase on attempts at contraction, thereby limiting mobility.[11,12] Persistent or intermittent abnormal postures of hands and feet are characteristic.

• 肌强直和肌纤维颤搐于静息时出现，于肌肉试图收缩时更为明显，患者因此而活动受限。手部及足部的持续性或间歇性姿势异常，也是神经性肌强直的主要特点。