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Muscle: Supraspinatus (Musculus supraspinatus)

Attachments: Origin & Insertion
Origin: (proximal attachment)
a. Supraspinous fossa of scapula.

Insertion: (distal attachment)
a. Superior aspect of greater tubercle of humerus.

a. Helps the deltoid muscle initiate the abduction of the arm at the shoulder (glenohumeral) joint.
b. Helps stablize the shoulder by drawing the humerus toward the glenoid fossa of the scapula.

Nerves & Nerve Roots:
a. Suprascapular nerve.
a. C5 and C6.

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Subscapularis Muscle