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Retractor costae
Group
Thorax
Whole Sale Section
Loin
Origin
Lumbar fascia in the area of the first four lumbar vertebrae.
Insertion
Caudal border of the last rib
Action
Retracts the last rib and aid in forced expiration.
Innervation
The costoabdominal nerve
Blood Supply
The dorsal costoabdominal artery