Which action is NOT associated with the trapezius muscle?

• A. Draw scapula dorsally
• B. Abduct limb
• C. Retract limb
• D. Support trunk

Answer: (D)

The trapezius muscle primarily functions in the movement and stabilization of the scapula, playing a crucial role in shoulder elevation, retraction, and rotation. Among its various actions, it is known for drawing the scapula dorsally (backward) and assisting in the abduction of the limb by ensuring appropriate positioning of the shoulder blade. Furthermore, it contributes to the retraction of the limb, which is important for achieving proper posture and shoulder mechanics.

While the trapezius does aid in supporting the upper trunk indirectly by stabilizing the shoulder girdle, its primary actions are focused more on the movement of the scapula and arm rather than directly supporting the trunk itself. This distinction makes supporting the trunk not a direct action associated with the trapezius muscle.