Adduction is accomplished primarily by the pectoralis major, latissimus dorsi, teres major, triceps, and coracobrachialis. The deltoid and the supraspinatus, a muscle that runs along the scapula in the back, are the two main abductors of the shoulder.
What muscles are responsible for arm abduction?
The primary muscles involved in the action of arm abduction include the supraspinatus, deltoid, trapezius, and serratus anterior.
What muscle causes adduction?
Adduction (returning thigh to midline): Produced by the adductor group of muscles. Rotation (rotation of the thigh around the hip joint): Produced by the lateral rotator group of muscles and the biceps femoris, sartorius, and gluteus medius and minimus.
What are the muscles of adduction?
The primary muscles that produce adduction of the GH joint are the teres major, latissimus dorsi, and pectoralis major.
What muscles do shoulder adduction?
The latissimus dorsi muscle at the level of the shoulder is the most important internal rotator, as it is the most important for the adduction and flexion of the shoulder. It’s a fusiform muscle. The pectoralis major muscle helps flexion, internal rotation, and adduction on a horizontal plane.
What muscles do shoulder horizontal adduction?
Muscles that Horizontally Adduct the Shoulder
- Anterior Deltoid.
- Pectoralis Major.
What do the adductor muscles do in a clam?
The muscles are strong enough to close the valves of the shell when they contract, and they are what enable the animal to close its valves tightly when necessary, such as when the bivalve is exposed to the air by low water levels, or when it is attacked by a predator.
What muscle causes adduction at the hip?
The primary hip adductors are the pectineus, adductor longus, gracilis, adductor brevis, and adductor magnus. The primary function of this muscle group is, of course, to create adduction torque, bringing the lower extremity toward the midline.
What happens to the body parts involved in adduction?
Moving the limb or hand laterally away from the body, or spreading the fingers or toes, is abduction. Adduction brings the limb or hand toward or across the midline of the body, or brings the fingers or toes together.
What’s adduction and abduction?
Official Answer. Abduction and adduction are terms that refer to certain body motions or movements. … With abduction, limbs (arms, legs or fingers) are moved away from your body’s midline. Adduction, however, refers to moving your limbs closer to the midline.
What is adduction and example?
Adduction is the movement of a body part toward the body’s midline. So, if a person has their arms straight out at the shoulders and brings them down to their sides, it is adduction. … Closing arms to the chest or bringing knees together are other examples of adduction.
What are the example of abduction and adduction?
Abduction and Adduction
For example, abduction is raising the arm at the shoulder joint, moving it laterally away from the body, while adduction brings the arm down to the side of the body. Similarly, abduction and adduction at the wrist moves the hand away from or toward the midline of the body.
Which muscle is used to abduct the shoulder?
The supraspinatus muscle originates from the supraspinous fossa of the scapula, passes under the acromion, and inserts on the superior facet of the greater tubercle of the humerus. It is responsible for the initiation of arm abduction and is in control of the motion up to the first 15 degrees of abduction.
What is the agonist muscle in shoulder adduction?
Agonist is deltoid, antagonist is the latissimus dorsi. As the muscles contract across the shoulder joint it brings your shoulder upward into flexion as you push the ball the opposite happens and the antagonist becomes your deltoid and the latissimus dorsi becomes your agonist.
Is shoulder adduction concentric or eccentric?