Which muscle assists with shoulder elevation?

Which muscle assists with shoulder elevation?

• A. Rhomboid
• B. Latissimus dorsi
• C. Trapezius
• D. Pectoralis major

Answer: (C)

The trapezius muscle plays a crucial role in shoulder elevation, making it the correct choice. Specifically, the superior fibers of the trapezius originate from the base of the skull and attach to the lateral third of the clavicle and the acromion of the scapula. When these fibers contract, they elevate the scapula, which in turn lifts the shoulder. This action is essential during various movements, such as shrugging the shoulders or lifting the arms overhead. In contrast, the rhomboids primarily work to retract the scapula, pulling it closer to the spine, and do not significantly contribute to elevation. The latissimus dorsi, while a powerful muscle for shoulder adduction and extension, primarily assists in pulling motion rather than elevating the shoulder. Pectoralis major mainly functions in flexion, adduction, and internal rotation of the shoulder rather than elevation. Therefore, the trapezius is the key muscle involved in elevating the shoulder.

The trapezius muscle plays a crucial role in shoulder elevation, making it the correct choice. Specifically, the superior fibers of the trapezius originate from the base of the skull and attach to the lateral third of the clavicle and the acromion of the scapula. When these fibers contract, they elevate the scapula, which in turn lifts the shoulder. This action is essential during various movements, such as shrugging the shoulders or lifting the arms overhead.

In contrast, the rhomboids primarily work to retract the scapula, pulling it closer to the spine, and do not significantly contribute to elevation. The latissimus dorsi, while a powerful muscle for shoulder adduction and extension, primarily assists in pulling motion rather than elevating the shoulder. Pectoralis major mainly functions in flexion, adduction, and internal rotation of the shoulder rather than elevation. Therefore, the trapezius is the key muscle involved in elevating the shoulder.