The muscles of the posterior compartments with their action and identify the layers of the muscles in which they reside. Concept introduction: The limb muscles are organized into compartments that are surrounded by deep fascia. These muscles help in the movement of the hand at the wrist, the fingers, or both. The muscles of the arm are subdivided into two compartments, namely anterior compartment and posterior compartment. Anterior compartment contains the elbow flexors; hence, it is also called flexor compartment. Posterior compartment contains the elbow extensors. Therefore, this compartment is also known as extensor compartment.

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Chapter 11.8, Problem 29LO

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To explain: The muscles of the posterior compartments with their action and identify the layers of the muscles in which they reside.

Concept introduction: The limb muscles are organized into compartments that are surrounded by deep fascia. These muscles help in the movement of the hand at the wrist, the fingers, or both. The muscles of the arm are subdivided into two compartments, namely anterior compartment and posterior compartment. Anterior compartment contains the elbow flexors; hence, it is also called flexor compartment. Posterior compartment contains the elbow extensors. Therefore, this compartment is also known as extensor compartment.

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