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HAI-abdominal muscle

Origin, insertion, action, innervation of muscles

External Oblique Ribs 5 - 12 Iliac crest and linea alba Paired- Flex vertebral column, compress abdomen. Single- Laterally flex & rotate vertebral column T7 - T12
Rectus abdominis Pubic crest and pubic symphysis Cartilage of 5th-7th ribs and xyphoid process Flexes vertebral column (bend from waist). Compress abdomen T7-T12
Internal Oblique Iliac crest, ingunial ligament, thoracolumbar fascia Ribs 9 - 12 and linea alba Paired- flex vertebral column, compress abdomen. Single- Laterally flex & rotate vertebral column T8 - T12
Transverse abdominis Iliac crest, ingunial ligament, lumbar fascia, cartiliage of interior 6 ribs (ribs 7-12) Xiphoid process, linea alba, pubis Compresses abdomen T8 - T12
Quadratus Lumborum Iliac crest, Iliolumbar ligament T.P. L1-L4, 12th rib Stablizes 12th rib, extends vertebral column (pulls spine upright after flexion) T12-L4
Created by: barbvajen