Question

With regard to extension of the arm, the latissimus dorsi is a(n) agonist; with regard to adducting and medially rotating the arm, the muscles in a(n) _____

Answer 1

The teres major and subscapularis muscles are responsible for adducting and medially rotating the arm. They interact with the latissimus dorsi, which is an agonist in the arm extension movement.

Step-by-step explanation:

With regard to adducting and medially rotating the arm, the muscles in question are the teres major and the subscapularis. The teres major assists the latissimus dorsi in extending the arm and also contributes to adduction and medial rotation of the arm. The subscapularis, originating on the anterior scapula, specifically mediates the medial rotation of the arm.With regard to adducting and medially rotating the arm, the muscles in a synergist role are the teres major and the teres minor. These muscles work together to assist in adduction and medial rotation of the arm.

The involvement of these muscles in arm movements is integral to the functionality of the shoulder joint. The teres major works as a synergist to the latissimus dorsi in arm extension but acts as an agonist during arm adduction and medial rotation. Understanding these roles helps explain the general organization of the muscular and skeletal systems when it comes to producing arm movements.