Test 3 principal muscles of anterolateral abdominal wall Flashcards
external oblique insertion
- linea alba,
- pubic tubercle
- anterior half of iliac crest
external oblique origin
exterrnal surfaces of 5th -12th ribs
external oblique innervation
thoraco-abdominal nerves(anterior rami ofT7-T11) and subcostal nerve
external oblique action
- compress and support abdominal viscera
- flex and rotate trunk
internal oblique origin
- thorco lumbar fascia
- anterior two thirds of iliac crest
- connective tissue deep to inguinal ligament
internal oblique insertion
- inferior borders of 10th-12th ribs
- linea alba
- pubis via conjoint tendon
internal oblique innervation
thoraco-abdominal nerves (anterior rami of T7-T11) and first lumbar nerve
internal oblique action
- compress and support abdominal viscera
- flex and rotate trunk
transversus abdominis origin
- internal surface of 7th 12th costal cartilages
- thoracolumbar fascia
- iliac crest
- connective tissue deep to inguinal ligament
transversus abdominis insertion
- linea alba with aponerosis of internal oblique
- pubic crest
- pectin pubis via conjoint tendon
transversus abdominis innervation
thoraco-abdominal nerves (anterior rami of T7-T11) and first lumbar nerve
transversus abdominis action
compressesand supports abdominal viscera
rectus abdominis origin
pubic symphisis and pubic crest
rectus abdominis insertion
xiphoid process and 5th- 7thcost cartilages
rectus abdominis innervation
horaco-abdominal nerves(anterior rami of inferior 6 thorcic nerves)
