Infraspinatus

Cards (7)

  • Infraspinatus:
    • Thick, triangular muscle, upper part is deep to trapezius, deltoid and the acromion process
  • O (origin)
    • Medial 2/3 of the infraspinous fossa of scapular
    A) Infraspinatus
  • R (direction)
    • Laterally and merge to a narrow tendon
    A) Infraspinatus
  • I (insertions)
    • Middle facet on the greater tubercle of humerus
    • Bursa separates tendon from posterior part of glenohumeral joint
    A) Infraspinatus
  • A (action)
    • Lateral rotation of glenohumeral joint
    A) Infraspinatus
  • NS (nerve supply)
    • Suprascapular nerve (C4 - C6)
    A) Infraspinatus
  • Infraspinatus - Function:
    • Stabilises the head of humerus in the glenoid fossa during glenohumeral movements with other rotator cuff muscles
    A) Infraspinatus