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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.he supraspinatus muscle arises from the supraspinous fossa, a shallow depression in the body of the scapula above its spine. The supraspinatus muscle tendon passes laterally beneath the cover of the acromion.
It consists of the following muscles: supraspinatus muscle, infraspinatus muscle, teres minor muscle and subscapularis muscle. These muscles all originate from the scapula and insert in the humerus. The subscapularis muscle, for example, is very important for the internal rotation of the humerus. It arises from the subscapular fossa and inserts on the lesser tubercle of the humerus. The teres minor muscle originates from the lateral scapula border and inserts on the greater tubercle of the humerus. The supraspinatus muscle has its origin in the supraspinatous fossa and inserts on the greater tubercle of the humerus â similar to the teres minor muscle. The fourth muscle of the rotator cuff is the infraspinatus muscle.