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 muscle is one of the musculotendinous support structures called the rotator cuff that surround and enclose the shoulder. It helps to resist the inferior gravitational forces placed across the shoulder joint due to the downward pull from the weight of the upper limb.
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.