Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Paroxysmal Choreoathetosis ?
    ### Response:
    Paroxysmal choreoathetosis is a movement disorder characterized by episodes or attacks of involuntary movements of the limbs, trunk, and facial muscles. The disorder may occur in several members of a family, or in only a single family member. Prior to an attack some individuals experience tightening of muscles or other physical symptoms.
    