1. 1  a suffix, equivalent in meaning to -ic, occurring in adjectives of Greek origin (analytic), used especially in the formation of adjectives from nouns with stems in -sis: hematotic; neurotic. Origin of -tic. Greek.
The supraspinatus (plural supraspinati, from Latin supraspinatus) is a relatively small muscle of the upper back that runs from the supraspinatous fossa superior of the scapula (shoulder blade) to the greater tubercle of the humerus. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder.
The supraspinatus muscle is unusual in the SITS muscles as it does not rotate the humerus, which is the bone of the upper arm, in the shoulder socket. Instead, it helps to lift the arm out to the side, a movement called abduction.. It is included in the rotator cuff because its tendons meld with the tendons of the muscles that do rotate the arm, and because when a person rotates his arm it is often abducted at the same time.