one of four rotaor cuff muscle and tendons of the shoulder joint. Its action is to extend the arm and rotates it laterally / externally. It also helps hold the head of the humerus in the shallow shoulder socket.
one of four rotaor cuff muscle and tendons of the shoulder joint. Its action is to extend the arm and rotates it laterally / externally. It also helps hold the head of the humerus in the shallow shoulder socket.