Three muscles are included in this term - the superficial, the middle, and the deep.

Origin. - All three arise from the ligamentum nuchae at the summit of the head, where they are placed one upon another.

Insertion. - The superficial cervico-auricularis is inserted into the middle of the inner surface of the concha, the middle one into the outer side of the same cartilage, and the deep one into the posterior aspect of its base.

Action. - To turn the ear so that its opening shall be directed outward or backward.