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A&P1 Muscles 7of11

Muscles of the Abdominal Wall

MuscleOriginInsertionActionintervation
External oblique Outer surface of lower ribs Outer lip of iliac crest & linea alba Tenses abdominal wall and compresses abdominal contents
Internal oblique Crest of ilium and inguinal ligament Cartilages of lower ribs, linea alba, and crest of pubis Tenses abdominal wall and compresses abdominal contents
Transversus abdominis Costal cartilages of lower ribs, processes of lumbar vertebrae, lip of iliac crest, and inguinal ligament Linea alba and crest of pubis Tenses abdominal wall and compresses abdominal contents
Rectus abdominis Crest of pubis and symphysis pubis Xiphoid process of sternum and coastal cartilages Tenses abdominal wall and compresses abdominal contents, also flexes the vertebral column
transversus abdominus illiac crest,inguinal ligament lumbar fascia and cartilages of inferior 6th ribs xiphios process. linea alba and pubis compresses abdomen
Created by: DevilDoc
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