What muscle is responsible for arm adduction?

What muscle allows for adduction and flexion of the arm?

The pectoralis major muscle helps flexion, internal rotation, and adduction on a horizontal plane. The trapezius muscle influences the movements of the scapula and indirectly helps the shoulder in adduction and flexion in the initial degrees of movement.

Which muscle is responsible for adduction and internal rotation of the arm?

When contracting, the latissimus dorsi muscle produces torque and force to achieve its function (in this case extension, adduction and medial rotation of the glenohumeral joint).

What are the prime mover muscles for adduction of the arms?

These muscles include the latissimus dorsi and posterior fibres of the deltoids, with both acting as the prime mover. Teres major also assists this action. Pectoralis major and latissimus dorsi act as antagonists.

What is adduction of arm?

Arm adduction represents movement of the arm towards the midline of the body in the coronal plane. … It is the opposite of arm abduction and contributes to the combined movement of shoulder circumduction. It is produced by: pectoralis major (sternal part) latissimus dorsi.

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What muscle adducts the arm at the shoulder?

The latissimus dorsi extends, adducts, and medially rotates the humerus. Levator scapulae: This muscle runs deep to the sternocleidomastoid and trapezius muscles. It attaches to the transverse processes of the first four cervical vertebrae and the medial side of the scapula.

What muscle extends and adducts the arm?

Attachments: The latissimus dorsi originates from the lower spine and ribs and the upper pelvis and fascia of the deep trunk muscles. The muscle converges into a tendon attaching to the humerus. Actions: Extends, adducts, and medially rotates the upper arm.

What is horizontal adduction?

horizontal adduction (horizontal flexion)

Movement of the arm or thigh in the transverse plane from a lateral position to an anterior position. … General Links for this Work.

Which muscle acts to abduct and extend the arm at the shoulder quizlet?

The teres major acts to adduct, extend, and medially rotate the shoulder. The muscle is innervated by the lower subscapular nerve.

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. Gives you the force to push the ball.