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Infraspinatus

Infraspinatus

Description

Origin :

  • Infraspinous fossa of scapula.

Insertion :

  • Middle facet on greater tuberosity of humerus.

Innervation :

  • Suprascapular nerve (C5 and C6)

Arterial Supply :

  • Suprascapular and circumflex scapular arteries

Depth :

  • Deep

Action

Action :

  • Laterally rotates arm.
  • Helps to hold humeral head in glenoid cavity of scapula
Target Muscles Target MusclesLaterally rotates arm. Helps to hold humeral head in glenoid cavity of scapula