Supraspinatus Anatomy

Supraspinatus Muscle

Origin: Supraspinous fossa of scapula
Insertion: Superior facet of the greater tubercle of the humerus
Actions: Abduction of arm
Innervation: Suprascapular nerve (C5, C6)
Blood Supply: Suprascapular artery from the thyrocervical trunk and the dorsal scapular artery.

Primary Actions of the Supraspinatus Muscle

Primary Actions of the Supraspinatus

1. Abduction of the arm at the shoulder

Agonists:

  • Deltoid (middle fibers)

  Antagonists:

  • Latissimus Dorsi
  • Pectoralis Major
  • Teres Major
  • Triceps Brachii (long head)

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