Which of the following muscles works effectively with the latissimus dorsi in most of its concentric action and is said to be the latissimus dorsi's "little helper"?

Question

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The teres major muscle is often referred to as the latissimus dorsi's "little helper" because it assists the latissimus dorsi in its actions, such as internal rotation, adduction, and extension of the arm at the shoulder joint.

Which of the Following Muscles Works Effectively with the Latissimus