click below
click below
Normal Size Small Size show me how
HAI-abdominal muscle
Origin, insertion, action, innervation of muscles
Name | Origin | Insertion | Action | Innervation |
---|---|---|---|---|
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 |