Abdomen

Question 1

Rectus Abdominis

Answer 1

O: Pubis
I: xiphoid process of sternum, costal cartilage of ribs 5-7
N: segmentally by thoraco-abdominal nerves (T7-T12)
A: Flexion of lumbar spine

Question 2

External obliques

Answer 2

O: ribs 5-12
I: iliac crest, pubic tubercle, linea alba
N: intercostal nerves (T7-11), subcostal nerve (T12)
A: contralateral rotation of torso

Question 3

Internal obliques

Answer 3

O: inguinal ligament, iliac crest, lumbodorsal fascia
I: linea alba, pecten pubis, rib 10-12
N: thoraco-abdominal nerves (T6-11), subcostal nerve (T12), iliohypogastric nerve (L1), ilioinguinal nerve (L1)
A: compresses abdomen

Question 4

Transverse Abdominis

Answer 4

O: iliac crest, inguinal ligament, thoracolumbar fascia, costal cartilages 7-10
I: xiphoid process, linea alba, pubic crest, pecten pubis
N: thoraco-abdominal nerves (T6-11), subcostal nerve (T12), iliohypogastric nerve ( L1), ilioinguinal nerve (L1)