Which muscle serves as an important frontal and horizontal plane stabilizer of the trunk?

a. Longissimus thoracis
b. Quadratus lumborum
c. Rectus abdominus
d. Iliocostalis lumborum


ANS: B
The quadratus lumborum serves an important role in both frontal plane and horizontal plane
stabilization by "fixing" the pelvis.

Health Professions

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