This site is intended for healthcare professionals
Last reviewed dd mmm yyyy. Last edited dd mmm yyyy
Infraspinatus is one of the muscles of the scapular region. Triangular in shape, it is one of the rotator cuff muscles. It originates from the infraspinous fossa of the scapula and the fibrous intermuscular septa. It passes laterally to insert into the middle facet of the greater tuberosity of the humerus and the fibrous capsule of the shoulder joint.
Infraspinatus is innervated by the suprascapular nerve (C5,C6).
It acts to: