By, Sean Light CSCS
Since I have covered the first two rotator cuff muscles this week, I might as well finish up with the final two.
Today we have the infraspinatus, located on the posterior aspect of the scapula and is responsible for externally rotating the humerus. Also, like all RC muscles, it is highly responsible for glenohumeral stabilization.
Origin: Infraspinous fossa on the posterior scapula.
Insertion: Greater tubercle of the humerus.
SOURCE: Hosford DPT, Darryl “Shoulder Girdle Musculature,” http://www.PTCentral.com/muscles