yogabook / muscles / supraspinatus
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M. supraspinatus
scapulohumeral muscle of the shoulder girdle, as lateral abductor of the arm extending from the upper inner posterior scapula to the upper posterior outer humerus
Origin: supraspinous fossa of the scapula
Attachment: Tuberculum majus of the humerus
Innervation: Nervus suprascapularis from Plexus brachialis (C4-C6)
Antagonists:
Movement: Holds the humerus in the socket, abduction of the arm (up to approx. 70°), (slight) exorotation