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Posterior Triangle Of Neck Animation : Head and Neck anatomy : USMLE Step 1
The posterior triangle of the neck is an anatomical region that is bounded by the posterior border of the sternocleidomastoid muscle, the anterior border of the trapezius muscle, and the middle third of the clavicle. It contains several important structures, including muscles, nerves, blood vessels, and lymph nodes.
Here are some of the structures found in the posterior triangle of the neck:
Muscles: The posterior triangle contains several important muscles, including the trapezius, which covers the upper back and extends down to the mid-back, and the sternocleidomastoid, which runs from the base of the skull to the clavicle and sternum.
Nerves: Several nerves pass through or near the posterior triangle of the neck, including the spinal accessory nerve, which innervates the trapezius and sternocleidomastoid muscles, and the brachial plexus, which supplies nerves to the upper extremities.
Blood vessels: The posterior triangle contains several blood vessels, including the subclavian artery, which supplies blood to the arm and shoulder, and the external jugular vein, which drains blood from the face and scalp.
Lymph nodes: Several lymph nodes are found in the posterior triangle of the neck, including the occipital, posterior auricular, and superficial cervical nodes.
Understanding the anatomy of the posterior triangle of the neck is important for medical professionals, particularly those who perform procedures in this area or treat conditions that affect the structures in this region.
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