Uncontrollable repetition of a particular response,such as a word,phrase,or gesture,despite the absence or cessation of a stimulus,usually caused by brain injury or other organic disorder.

• 持续症，言语重复症对一种特定的反应难以控制的重复，如一个词、短语或手势，尽管没有受刺激或终止刺激，通常由脑部受伤或其他器官的紊乱引起