Muscles of the Anterior Abd wall

Question 1

External Abd Oblique

Answer 1

0 – external surface of the 5th to 12th ribs
I – linea alba, pubic crest, iliac crest, pubic symphysis
N – Inferior 5 thoracic nerves and subcostal nerve(T12) and iliohypogastric
A – flex and rotate trunk, laterally rotate the trunk, compress abdominal contents

Question 2

Internal abd Oblique

Answer 2

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

Question 3

Transversus Abdominis

Answer 3

0 – thoracolumbar fascia, iliac crest, lateral one third of the inguinal ligament, internal surface of costal cartilage’s 7 to 12
I – linea alba, pubic crest, pubic symphysis
N – lower 5 thoracic nerves, subcostal, iliohypogastric
A – compress and support abdominal viscera

Question 4

Rectus Abdominis

Answer 4

0 – pubic symphysis, pubic crest
I – xiphoid process, 5th and 7th costal cartilage’s
N – lower 5 thoracic nerves, subcostal, iliohypogastric
A – flexes trunk and tenses anterior abdominal wall