The deltoid muscle fibers are separated into __________.

• A. deep and superficial layers
• B. medial and lateral bundles
• C. anterior, middle, and posterior sections
• D. superior and inferior compartments

Answer: (C)

Verified step by step guidance

1. Understand the anatomy of the deltoid muscle: The deltoid is a triangular-shaped muscle located on the shoulder. It is responsible for various movements of the arm, including abduction, flexion, extension, and rotation.
2. Learn about muscle fiber organization: Muscles are often divided into sections or compartments based on their function and anatomical location. The deltoid muscle is divided into three distinct sections based on the orientation of its fibers.
3. Identify the sections of the deltoid muscle: The deltoid muscle is separated into anterior, middle, and posterior sections. Each section has specific roles in arm movement. For example, the anterior fibers assist in flexion and medial rotation, the middle fibers are primarily responsible for abduction, and the posterior fibers contribute to extension and lateral rotation.
4. Compare the options provided in the question: Evaluate each option to determine which one accurately describes the division of the deltoid muscle fibers. The correct answer is 'anterior, middle, and posterior sections,' as this aligns with the anatomical structure of the deltoid.
5. Reinforce understanding: To solidify your knowledge, visualize the deltoid muscle using diagrams or models, and consider how each section contributes to shoulder and arm movements during different activities.