Which muscles act as antagonists to upward rotation of the scapula?

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Prepare for the NHI Eastern Kinesiology Test with our comprehensive quiz. Utilize flashcards and multiple-choice questions, complete with hints and detailed explanations. Ready yourself for success!

Multiple Choice

Which muscles act as antagonists to upward rotation of the scapula?

Explanation:
Upward rotation of the scapula is produced mainly by the serratus anterior and the trapezius (upper and lower fibers). Antagonists are the muscles that rotate the scapula downward. Levator scapulae elevates the scapula and, when the scapula is fixed, can contribute to downward rotation; rhomboids retract the scapula and rotate it downward; and pectoralis minor pulls the scapula into a downward position by tilting it anteriorly. Together, these three oppose upward rotation. The other muscles either promote upward rotation or don’t produce primarily downward rotation, so they don’t fit as antagonists.

Upward rotation of the scapula is produced mainly by the serratus anterior and the trapezius (upper and lower fibers). Antagonists are the muscles that rotate the scapula downward. Levator scapulae elevates the scapula and, when the scapula is fixed, can contribute to downward rotation; rhomboids retract the scapula and rotate it downward; and pectoralis minor pulls the scapula into a downward position by tilting it anteriorly. Together, these three oppose upward rotation. The other muscles either promote upward rotation or don’t produce primarily downward rotation, so they don’t fit as antagonists.

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