Written by Oliver Jones

Last updated October 9, 2022 • 3 Revisions

The subscapularis is an intrinsic muscle of the shoulder region. It is part of the rotator cuff muscle group.

  • Attachments: Originates from the subscapular fossa (anterior surface of the scapula). It attaches to the lesser tubercle of the humerus.
  • Actions: Medial rotation of the arm
  • Innervation: Upper and lower subscapular nerves.
  • Blood supply: Subscapular artery.

Fig 1
The rotator cuff muscles, which act to stabilise the shoulder joint.

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