Aim:To understand the function of the sternocleidomastoid muscle and the accessory nerve in spasmodic torticollis and to provide the appropriate surgical incision and surgical method.

• 了解胸锁乳突肌和副神经的解剖关系及在痉挛性斜颈中的作用，为手术治疗痉挛性斜颈的切口 和方法提供解剖依据。