Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
ORIGIN: Anterior angles of lower eight ribs
INSERTION: Outer anterior half of iliac crest, inguinal lig, public tubercle and crest, and aponeurosis of anterior rectus sheath
ACTION: Supports abdominal wall, assists forced expiration, assists raising intraabdominal pressure and, with muscles of opposite side, abducts and rotates trunk
NERVE: Anterior primary rami (T7-12)

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