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Questions and Answers
Which muscle forms the anterior boundary of the posterior triangle of the neck?
Which muscle is located in the floor of the posterior triangle of the neck?
Which artery arises from the thyro-cervical trunk and crosses the base of the posterior triangle of the neck?
Which vein crosses the base of the posterior triangle of the neck anteroinferior to the subclavian artery?
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Which nerve appears at the middle of the posterior border of the sternomastoid muscle?
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Which structure forms the roof of the posterior triangle of the neck?
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Which triangle is subdivided into 3 ½ triangles by the digastric muscle and superior belly of omohyoid?
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Which vessel crosses the base of the posterior triangle of the neck?
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What structure divides each side of the neck into two main triangles?
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Which artery arises from a branch of the subclavian artery and crosses the base of the posterior triangle?
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Study Notes
Posterior Triangle of the Neck
- The anterior boundary of the posterior triangle of the neck is formed by the sternocleidomastoid muscle.
- The floor of the posterior triangle of the neck is occupied by the scalene muscles.
Arterial Supply
- The transverse cervical artery arises from the thyrocervical trunk and crosses the base of the posterior triangle of the neck.
- The subclavian artery is crossed by the transverse cervical artery at the base of the posterior triangle.
Venous Drainage
- The external jugular vein crosses the base of the posterior triangle anteroinferior to the subclavian artery.
Nervous System
- The spinal accessory nerve (CN XI) appears at the middle of the posterior border of the sternocleidomastoid muscle.
Boundaries and Divisions
- The roof of the posterior triangle of the neck is formed by the trapezius muscle and the omohyoid muscle.
- The neck is divided into two main triangles (anterior and posterior) by the sternocleidomastoid muscle.
- The posterior triangle is further subdivided into 3 ½ triangles by the digastric muscle and superior belly of omohyoid.
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Description
Test your knowledge of the anatomy of the neck and its triangles with this quiz. Identify the structures and landmarks related to the sternocleidomastoid muscle, trapezius muscle, anterior triangle, posterior triangle, axillary inlet, and more.
