Anterior Abdominal Wall

Question 1

External Oblique

Answer 1

O: external surface of 5th-12th ribs
I: Linda Alba, pubic crest, iliac crest, pubic symphysis
A: flex and rotate trunk, laterally rotate trunk, compress abdominal contents
N: inferior 5 thoracic nerves and subcostal n. (T12) and iliohypogastric

Question 2

Internal Oblique

Answer 2

O: thoracolumbar fascia, anterior iliac crest, lateral half of inguinal ligament
I: Linda alba, pubic crest, ribs 10-12 inferior surface
A: flex and rotate trunk, laterally rotate trunk, compress abdominal contents
N: lower 5 thoracic, subcostal, iliohypogastric

Question 3

Rectus Abdominus

Answer 3

O: pubic symphysis, pubic crest
I: xiphoid process, 5th and 7th costal cartilages
A: flex trunk and tenses anterior abdominal wall
N: lower 5 thoracic nerves, subcostal, hypogastric

Question 4

Transversus Abdominus

Answer 4

O: thoracolumbar fascia, iliac crest, lateral 1/3 of inguinal ligament, internal surface of costal cartilages 7-12
I: linea alba, pubic crest, pubic symphesis
A: compress and support abdominal viscera
N: lower 5 thoracic, subcostal, iliohypogastric