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Glossary of Anat- Abdominal Wall Muscles

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Created by bekabirder

rectus abdominis: origin
pubic symphysis and pubic crest
rectus abdominis: insertion
xiphoid process and 5th-7th costal cartilages
rectus abdominis: innervation
thoracoabdominal nerves and anterior rami of inferior thoracic nerves
rectus abdominis:action
flexes trunk and compresses abdominal viscera, stabilizes and controls tilt of pelvis
rectus abdominis: blood supply
superficial and deep superior and inferior epigastric artery and vein
external oblique: origin
external surfaces of 5th-12th ribs
external oblique: insertion
linea alba, pubic tubercle, and anterior half of iliac crest
external oblique: innervation
thoracoabdominal nerves and subcostal nerve
external oblique: action
compress and support abdominal viscera, flex and rotate trunk
external oblique: blood supply
superior and inferior epigastric artery and vein, lumbar artery and vein
internal oblique: origin
thoracolumbar fascia, anterior two-thirds of iliac crest, lateral half of inguinal ligament
internal oblique: insertion
inferior border of 10th-12th ribs, linea alba, and pubis via conjoint tendon
internal oblique: innervation
thoracoabdominal anterior rami of inferior six thoracic nerves; first lumbar nerve
internal oblique: action
compress and support abdominal viscera, flex and rotate trunk
internal oblique: blood supply
superficial and deep superior and inferior epigastric artery and vein; lumbar artery and vein
transversus abdominis: origin
internal surface of 7th-12th costal cartilages, thoracolumbar fascia, iliac crest, lateral third of inguinal ligament
transversus abdominis: insertion
linea alba with aponeurosis of internal oblique, pubic crest, and pectin pubis via conjoint tendon
transversus abdominis: innervation
thoracoabdominal anterior rami of inferior six thoracic nerves and first lumbar nerve
transversus abdominis: action
compresses and supports abdominal viscera
transversus abdominis: blood supply
superficial and deep inferior epigastric artery and vein; lumbar artery and vein
psoas: origin
transverse processes of lumbar vertebrae; sides of bodies of T12-L5 vertebrae and intervening IV discs
psoas: insertion
by a strong tendon to lesser trochanter of femur
psoas: innervation
lumbar plexus via anterior branches of nerves L2-L4
psoas: action
acting inferiorly with iliacus; flexes thigh, acting superiorly; flexes vertebral column laterally used to balance trunk while sitting, acts inferiorly with iliacus to flex trunk
psoas: blood supply
lumbar artery and vein
quadratus lumborum: origin
medial half of inferior border of 12th rib and tips of lumbar transverse processes
quadratus lumborum: insertion
iliolumbar ligament and internal lip of iliac crest
quadratus lumborum: innervation
anterior branches of T12 and L1-L4 nerves
quadratus lumborum: action
extends and laterally flexes vertebral column; fixes 12th rib during inspiration
quadratus lumborum: blood supply
lumbar artery and vein
iliacus: origin
superior two thirds of iliac fossa, ala of scrum, and interior sacroiliac ligaments
iliacus: insertion
lesser trochanter of femur and shaft inferior to it, and to psoas major tendon
iliacus: innervation
femoral nerves (L2-L4)
iliacus: blood supply
lumbar artery and vein

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