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Serratus anterior muscle is the surface of upper 9 ribs at side of chest - anterior aspect along entire length of medial border of scapula - (protraction) draws medial border of scapula away from vertebrae (upward rotation). Funtion: pulls scapula forward. Originates from upper outer surface of ribs 1-8; inserts onto the vertebral border of the scapula. Data originally published on Wikipedia |