Muscles of Anterolateral Abdominal Wall Flashcards
Insertion of external oblique
Linea alba, pubic tubercle, and anterior half of iliac crest
Origin of external oblique
External surfaces of 5th-12th ribs
Innervation of external oblique
Thoraco-abdominal nerves (anterior rami of T7-T11) and subcostal nerve
Action of external oblique
Compress and support abdominal viscera
Flex and rotate trunk
Origin of internal oblique
Throracolumbar fascia, anterior two thirds of iliac crest, and connective tissue deep to inguinal ligament
Insertion of internal oblique
Inferior borders of 10th-12th ribs
Linea alba
Pubis via conjoint aponeurosis
Innervation of internal oblique
Thoraco-acromial nerves (anterior rami of T7-T11)
Subcostal and first lumbar nerve
Action of internal oblique
Compress and support abdominal viscera
Flex and rotate trunk
Origin of transversus abdominis
Internal surfaces of 7th-12th costal cartilages
Thoracolumbar fascia
Iliac crest
Connective tissue deep to inguinal ligament
Insertion of transversus abdominis
Linea alba with aponeurosis of internal oblique
Pubic crest
Pubis via conjoint tendon
Innervation of transversus abdominis
Throaco-abdominal nerves (anterior rami of T7-T11)
Subcostal and first lumbar nerve
Action of transversus abdominis
Compresses and supports abdominal viscera
Origin of rectus abdominis
Pubic symphysis and pubic crest
Insertion of rectus abdominis
Xiphoid process and 5th-7th costal cartilages
Innervation of rectus abdominis
Thoraco-abdominal and subcostal nerves (anterior rami of T7-T12 spinal nerves)