Origin
Scapula – infraspinous fossa.
Insertion
Humerus – greater tubercle.
Blood supply
Suprascapular artery, circumflex scapular artery.
Nerve supply
Suprascapular nerve.
Action
It externally rotates the arm and stabilizes the shoulder joint.
Disease/Injury
Excessive computer work or car driving can strain this muscle giving rise to pain.
Muscle Exercise
Frequent driving or long hours at the computer must be interspersed with simple shoulder rotations and forward/backward movements in order to avoid strain of the shoulder muscles.
Interesting facts
NA
