What is the distal attachment of the subscapularis muscle?

What is the distal attachment of the subscapularis muscle?

• A. Medial epicondyle of the humerus
• B. Lesser tubercle of the humerus
• C. Greater tubercle of the humerus
• D. Anatomical neck of the humerus

Answer: (B)

The subscapularis muscle is one of the four rotator cuff muscles, primarily responsible for its role in shoulder movements. Its distal attachment is specifically to the lesser tubercle of the humerus. This attachment point is crucial as it allows the subscapularis to function effectively in medially rotating and adducting the arm. The lesser tubercle serves as a pivotal site for muscle attachment, ensuring the muscle can exert its force optimally. This design supports various shoulder functions, including stabilization of the shoulder joint during movements. The alignment of the muscle fibers also aids in engaging the joint both in dynamic and static states. Understanding this specific attachment enhances your comprehension of both muscle function and the broader biomechanics of shoulder movement, highlighting the significance of muscular attachments in anatomical and functional contexts.

The subscapularis muscle is one of the four rotator cuff muscles, primarily responsible for its role in shoulder movements. Its distal attachment is specifically to the lesser tubercle of the humerus. This attachment point is crucial as it allows the subscapularis to function effectively in medially rotating and adducting the arm.

The lesser tubercle serves as a pivotal site for muscle attachment, ensuring the muscle can exert its force optimally. This design supports various shoulder functions, including stabilization of the shoulder joint during movements. The alignment of the muscle fibers also aids in engaging the joint both in dynamic and static states.

Understanding this specific attachment enhances your comprehension of both muscle function and the broader biomechanics of shoulder movement, highlighting the significance of muscular attachments in anatomical and functional contexts.