Unilateral contraction of which muscle causes ipsilateral flexion of the lumbar vertebral column?
A) Multifidus
B) Latissimus dorsi
C) External intercostals
D) Serratus anterior
E) Quadratus lumborum

Question

Quizplus · Accepted Answer

The quadratus lumborum is a muscle located in the lower back, and its unilateral contraction causes ipsilateral (same side) flexion of the lumbar vertebral column. This muscle is often involved in movements such as bending to the side or walking.

Unilateral Contraction of Which Muscle Causes Ipsilateral Flexion of the Lumbar