What is the action of rhomboid major?

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Multiple Choice

What is the action of rhomboid major?

Explanation:
The main action tested is how rhomboid major moves the scapula. When this muscle contracts, it pulls the medial border of the scapula toward the spine, producing retraction (adduction). Its fibers also angle downward, so the scapula is rotated downward, moving the glenoid cavity slightly downward. Plus, it helps hold the scapula flat against the thoracic wall, stabilizing it during arm movements. This combination—retraction, downward rotation, and stabilization—fits the described actions best. Elevation is mainly from the levator scapulae (and trapezius to some extent), protraction (abduction) is done by serratus anterior, and upward rotation is accomplished by trapezius and serratus anterior, not the rhomboids.

The main action tested is how rhomboid major moves the scapula. When this muscle contracts, it pulls the medial border of the scapula toward the spine, producing retraction (adduction). Its fibers also angle downward, so the scapula is rotated downward, moving the glenoid cavity slightly downward. Plus, it helps hold the scapula flat against the thoracic wall, stabilizing it during arm movements. This combination—retraction, downward rotation, and stabilization—fits the described actions best. Elevation is mainly from the levator scapulae (and trapezius to some extent), protraction (abduction) is done by serratus anterior, and upward rotation is accomplished by trapezius and serratus anterior, not the rhomboids.

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