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Abdominal Muscles

MuscleOriginInsertionAction
Rectus Abdominis pubic symphysis cartilege of ribs and xiphoid process flexes vertebral column, compresses abdomen
External Oblique ribs iliac crest flex and rotate vertebral column, compresses abdomen
Internal Oblique iliac crest ribs flex and rotate vertebral column, compresses abdomen
Transverse Oblique iliac crest xiphoid process, linea alba, pubis Compresses abdomen
Diaphragm xiphoid process, inferior six ribs, lumbar vertebrae central tendon inhalation and exhalation
External Intercostals inferior border of rib above superior border of rib below elevate ribs
Internal Intercostals superior border of rib below inferior border of rib above draws ribs together