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Home > Anatomy & Physiology > Muscles > Infraspinatus

Infraspinatus

The Infraspinatus muscle is one of the four rotator cuff muscles and is commonly injured. It is the main external rotator of the shoulder joint and works in conjunction with the Terres Minor.

Origin

  • Posterior surface of the scapula (below the spine of the scapula)

Insertion

  • Greater tuberosity on the humerus

Actions

  • Shoulder abduction
  • External rotation

Innervation

  • Suprascapular nerve

Daily uses

  • Brushing hair

How can I stretch it?

How can I strengthen it?

Infraspinatus

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