Question #581

Cricothyroid passes from the anterior cricoid cartilage to both the anterior and posterior surface of the thyroid cartilage. On contraction both the cricoid and thyroid cartilage move to shorten the distance between them. It is thought that rotation of the cricoid cartilage accounts for the majority of this.

Cricothyroid is innervated by the external branch of the superior laryngeal nerve, all of the other intrinsic laryngeal muscles are innervated by the recurrent laryngeal nerve.

The internal branch of the superior laryngeal nerve pierces the thyrohyoid membrane.

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