M. Serratus Anterior
Origin
Upper nine ribs
Attachments
Margo medialis and angulus inferior/superior of the shoulder blades
Function
Tilts the shoulder blades
Innervation
Nervus thoracicus longus
Spinal Segment
C5-C7
The serratus anterior muscle (latin for "anterior sawmuscle“ or "anterior sawtooth muscle“; outdated name: Musculus serratus lateralis, Jenaer Nomina Anatomica 1935) is a skeletal muscle of the shoulder girdle. It runs from the chest towards the back and build a characteristic pattern which resembles the teeth of a saw and thus giving it it's name. It is sometimes also called the boxer muscle.