Anterior Abdominal Wall Muscles Flashcards
What is the origin of the rectus abdominis ?
Pubis and pubis symphysis
What is the insertion of the rectus abdominis ?
Cartilagous of ribs 5-7 and base of sternum
What are the joint actions of rectus abdominas ?
Flexion of vertebral column
Tilts pelvis backwards
What is the origin of external obliques ?
Outer surface of bottom 8 ribs
What is the insertion of the external obliques ?
Mainly linea alba
Iliac crest
What are the joint actions of the external obliques ?
Unilaterally rotation and lateral flexion
Bilateral flexion of vertebral column
What is origin of internal obliques ?
Thoracolumber fascia or iliac crest
What is the insertion of internal obliques ?
Linea alba, bottom three ribs
What are the joint actions of the internal obliques
Unilaterally rotation and lateral flexion
Bilaterally flexion of vertebral column
What is origin of transverse abdominas ?
Thoracolumbar fascia
Cartilage of lower 6 ribs and iliac crest
What is the insertion of transverse abdominas ?
Linea alba
What are joint actions of transverse abdominas ?
Increase IAP and compression of an cavity
Support an contents
