Supraspinatus

Cards (7)

  • O (origin)
    • Medial 2/3 of the supraspinous fossa
    A) Supraspinatus
  • R (direction)
    • Laterally
    A) Supraspinatus
  • I (insertion)
    • Tendon forms within the muscle as it passes laterally below trapezius, the acromion process and the coracoacromial ligament
    • Tendon blends in with superior aspect of the glenohumeral joint capsule
    • Inserts into upper facet on the greater tubercle of humerus
    A) Supraspinatus
  • A (actions)
    • Initiates abduction of glenohumeral joint
    A) Supraspinatus
  • NS (nerve supply)
    • Suprascapular nerve (C4 - C6)
    A) Supraspinatus
  • Supraspinatus:
    • Located on posterior aspect of scapula above the spine of scapula, deep to trapezius
  • Supraspinatus - Function:
    • Holds the head of humerus against the glenoid fossa to prevent upward shearing
    A) Supraspinatus