Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
ORIGIN: Inferior border of 12th rib
INSERTION: Apices of transverse processes of L1-4, iliolumbar ligament and posterior third of iliac crest
ACTION: Fixes 12th rib during respiration and lateral flexes trunk
NERVE: Anterior primary rami (T12-L3)

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