Adduction of upper arm at the shoulder
a large triangular muscle covering the joint of the shoulder, the action of which raises the arm away from the side of the body.
The deltoid muscle is the big muscle on the shoulder. It has three parts; the front or anterior, middle and back or posterior. It involves the shoulder joint.
It contributes to adduction, horizontal adduction, and flexion of the humerus, enabling the arm to swing forwards, and it is a synergist of the pectoralis minor.
in shoulder joint
It is a triangular muscle covering the shoulder joint, it raises the arm from the side of the body
none as the joint ca[sule is an inert structure meaning no contractile tissue
The latissimus dorsi muscle is responsible for adducting the shoulder and causing extension of the shoulder joint. It is a large triangular muscle located in the back that helps with various movements of the shoulder and arm.
Raising the arm laterally at the shoulder is primarily caused by the contraction of the deltoid muscle. This muscle is responsible for abduction of the arm at the shoulder joint, allowing you to lift your arm out to the side. The action is coordinated by signals from the brain through the nervous system to the muscle fibers.
the answer isD. Infraspinatus
The lower trapezius muscle helps stabilize the shoulder blade and supports proper movement of the shoulder joint. It plays a key role in maintaining good posture and preventing shoulder injuries.
If the muscle crosses a joint (most do), then the joint acts as a pivot.
The action of the supraspinatus is to stabilize the shoulder joint and help prevent downward location of the humerus and to assist in abduction.