The infraspinatus muscle is attached along the broad inner edge of the scapula. It originates from the infraspinous fossa of the scapula and narrows into a strong tendon that inserts firmly to the top of the humerus. This muscle is innervated by the suprascapular nerve from the fifth to sixth cervical nerves and supplied by the circumflex artery. The infraspinatus muscle sits on the back of the shoulder blade below the spine and under the deltoid muscle. It works with the supraspinatus muscle to help lift and twist the upper arm. These two muscles also help support and protect the shoulder joint by keeping the head of the humerus in place. Research Infraspinatus
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Medicine
Research Infraspinatus
