The carotid sheath is a condensation of deep cervical fascia enclosing several major neurovascular structures. Which of the following structures is NOT located within the carotid sheath?
- A Cervical sympathetic trunk ✓
- B Vagus nerve
- C Common carotid artery
- D Internal jugular vein
Correct answer: A. Cervical sympathetic trunk
Explanation
The carotid sheath contains the internal jugular vein laterally, the common carotid artery (and internal carotid artery above the bifurcation) medially, and the vagus nerve posteriorly between them. The cervical sympathetic trunk lies posterior to the carotid sheath, resting on the prevertebral fascia, and is not enclosed within it. This distinction is surgically relevant during neck dissections.
Reference: Gray's Anatomy, 42nd ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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