what is the function of the supraspinatus muscle
Supraspinatus muscle The supraspinatus muscle performs abduction of the arm, and pulls the head of the humerus medially towards the glenoid cavity.[5] It independently prevents the head of the humerus to slip inferiorly.[5] The supraspinatus works in cooperation with the deltoid muscle to perform abduction, including when the arm is in adducted position.[5] Beyond 15 degrees the deltoid muscle becomes increasingly more effective at abducting the arm and becomes the main propagator of this action.[6]
Adductor longus muscle Its main actions is to adduct and laterally rotate the thigh; it can also produce some degree of flexion/anteversion.[1]
Rotator cuff In anatomy, the rotator cuff [1]) is a group of muscles and their tendons that act to stabilize the shoulder. Of the seven scapulohumeral muscles, four make up the rotator cuff. The four muscles are the supraspinatus muscle, the infraspinatus muscle, teres minor muscle, and the subscapularis muscle.
Triceps brachii muscle With its origin on the scapula, the long head also acts on the shoulder joint and is also involved in retroversion and adduction of the arm.[1]