The carotid sheath in the neck contains which three structures and is traversed by which cranial nerve?

• A Common carotid artery, subclavian vein, and glossopharyngeal nerve
• B Internal carotid artery, external jugular vein, and accessory nerve
• C Common carotid artery, internal jugular vein, and hypoglossal nerve
• D Common/internal carotid artery, internal jugular vein, and vagus nerve — no cranial nerve traverses the sheath itself ✓

Explanation

The carotid sheath contains: (1) common carotid artery (becomes internal and external carotid above the carotid bifurcation at C3-4), (2) internal jugular vein (lateral to artery), and (3) vagus nerve (CN X, posterior between artery and vein). No cranial nerve traverses the sheath — the vagus nerve runs within it. The ansa cervicalis (a branch from C1-C3 loops) is embedded in the anterior surface of the sheath but does not pass through it. The carotid sinus nerve (branch of CN IX) innervates the carotid body but enters from outside the sheath.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.