Muscle Atlas

Serratus Anterior

Origin: Superolateral surfaces of upper 8 or 9 ribs at the side of chest
Insertion: Vertebral border of scapula
Action: Draws scapula forward and upward; abducts scapula and rotates it; stabilizes vertebral border of scapula
Innervation: Long thoracic nerve (C5, C6, C7)
Arterial Supply: Circumflex scapular artery

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