Ortho-Preferred

Supraspinatus Muscle 


- See:
      - Abductors of the Shoulder:
      - Rotator cuff;

- Anatomy:
    - origin: medial 2/3 of supraspinatus fossa above spine of scapula;
    - insertion: superior surface of greater tuberosity of humerus and capsule of shoulder joint;
    - demensions: supraspinatus averages 25 mm wide and has a medial-to-lateral footprint (tendon attachment) of 12.1 mm at the midtendon
    - action: abduction of humerus at GHJ: stabilization of glenohumeral joint;
    - nerve supply: suprascapular, C4, C5
    - synergist: deltoid;

- Function:
    - supraspinatus muscle contributes to GH stability, demonstrating peak activity in late cocking phase of throwing mechanics.

- Injury:
    - overuse of supraspinatus & resulting fatigue can subject amateur athlete to shoulder injuries.

- Exam:
    - the supraspinatus muscle is tested with the shoulder abducted 90 degrees, flexed 30 deg and then maximally internally rotated;
    - downward pressure is resisted primarily by the supraspinatus




  Clarification of the role of the supraspinatus muscle in shoulder function.

  The microvascular pattern of the supraspinatus tendon.

  Arthroscopic treatment of massive rotator cuff tears. Clinical results and biomechanical rationale.

  Advancement of the supraspinatus muscle in the repair of ruptures of the rotator cuff.

  A quantitative histological study of the vascularity of the rotator cuff tendon.

  Year Book: Isolated Rupture of the Tendon of the Subscapularis Muscle: Clinical Features in 16 Cases.

  The role of the supraspinatus and infraspinatus muscles in glenohumeral kinematics of anterior should instability.

  Changes in the moment arms of the rotator cuff and deltoid muscles with abduction and rotation.

  Suprascapular neuropathy in volleyball players.

  Humeral Insertion of the Supraspinatus and Infraspinatus. New Anatomical Findings Regarding the Footprint of the Rotator Cuff.

  Humeral Insertion of the Supraspinatus and Infraspinatus. New Anatomical Findings Regarding the Footprint of the Rotator Cuff. Surgical Technique 
 
 The histology of tendon attachments to bone in man.



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Thursday, March 1, 2012 2:59 pm