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Chapter 10. Head and Neck

Which muscle is innervated by the external branch of the superior laryngeal nerve?

A. Posterior cricoarytenoid

B. Lateral cricoarytenoid

C. Thyroid arytenoid

D. Cricothyroid

E. Interarytenoid

The cricothyroid muscle is the only muscle of the larynx innervated by the external branch of the superior laryngeal nerve. All other laryngeal muscles are innervated by the recurrent laryngeal nerve.

A 48-year-old male with massive head trauma does not have a gag reflex. Which nerve is responsible for the sensory nerve fibers that carry this reflex?

A. Marginal mandibular nerve

B. Recurrent laryngeal nerve

C. Facial nerve

D. Glossopharyngeal nerve

E. Vagus nerve

The afferent limb of the gag reflex comes from the glossopharyngeal nerve (cranial nerve IX).

The most common cause of a neck mass in males over the age of 60 is:

A. Laryngocele

B. Metastatic carcinoma

C. Brachial cleft cyst

D. Bacterial adenitis

E. Carotid aneurysm

Most neck masses in males over the age of 60 are as a result of metastatic spread from cancers in the chest and abdomen. These cancers frequently metastasize via lymphatic spread, and the most common location for the neck mass is within the supraclavicular fossa.

A 2nd year Internal Medicine resident stops you in the hall with a painless, 2-cm, slowly enlarging parotid mass. What does this most likely represent?

A. Hemangioma

B. Warthin tumor

C. Pleomorphic adenoma

D. Mucoepidermoid carcinoma

E. Adenoid cystic carcinoma

Pleomorphic adenomas are the most common benign salivary gland tumors, comprising 85% of all salivary gland neoplasms. Tumors of the parotid gland are the most common of the salivary gland tumors with a 5 × higher incidence than tumors of the minor salivary glands. The vast majority of tumors of the parotid gland are benign in nature.

A 14-year-old boy presents to the ER with epistaxis after being struck in the face with a baseball. Examination reveals a compressible, nontender mass involving the ...

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