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The posterior scalene, (Latin: scalenus posterior) is the smallest and most deeply seated of the scalene muscles. It arises, by two or three separate tendons, from the posterior tubercles of the transverse processes of the lower two or three cervical vertebrae, and is inserted by a thin tendon into the outer surface of the second rib, behind ...
The posterior triangle has the following boundaries: [1] Apex: Union of the sternocleidomastoid and the trapezius muscles at the superior nuchal line of the occipital bone. Anteriorly: Posterior border of the sternocleidomastoideus. Posteriorly: Anterior border of the trapezius. Inferiorly: Middle one third of the clavicle
Posterior triangle is bordered by the posterior border of the sternocleidomastoid muscle, anterior border of the trapezius muscle and the superior edge of the middle third of the clavicle. This triangle contains the sternocleidomastoid, trapezius, splenius capitis , levator scapulae , omohyoid, anterior, middle and posterior scalene muscles .
lateral head: posterior humerus (above radial sulcus) medial head: posterior humerus - (below radial sulcus) olecranon of ulna: deep artery of arm: radial nerve: extends forearm, adducts shoulder (long head). medial head does not function at shoulder. biceps brachii, brachialis: 2 1 articularis cubiti: Upper Limb, Arm, Posterior compartment ...
The branches of the cervical plexus emerge from the posterior triangle at the nerve ... It is situated anterior to the middle scalene muscle, ... Anatomy figure: ...
The patient would be unable to pull their shoulder back, as when standing at attention. Isolated dorsal scapular nerve injury is uncommon, but case reports usually involve injury to the scalene muscles. [5] The dorsal scapular nerve is typically not anaesthetised during a supraclavicular nerve block. [6] This can cause pain after some surgeries ...
The prevertebral fascia is prolonged downward and laterally behind the carotid vessels and in front of the scalene muscles. It forms a sheath for the brachial nerves , subclavian artery , and subclavian vein in the posterior triangle of the neck; it is continued under the clavicle as the axillary sheath and is attached to the deep surface of ...
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