DISSECTION 4: ANTEROLATERAL WALL AND EXTERNAL GENETALIA

Question 1

External Oblique

Answer 1

O: external surfaces of ribs 5-12
I: linea alba, pubic tubercle, anterior 1/2 of iliac crest
A: flex and rotate the trunk
N: thoracoabdominal N, T7-T11 spinal nerves, Subcostal N

Question 2

Internal Oblique

Answer 2

O: thoracolumbar fascia, iliac crest, lateral 1/2 of inguinal ligament
I: inferior border of ribs 10-12, linea alba, pubic crest, and pectineal line of pubis via conjoint tendon
A: flex and rotate trunk
N: thoracoabdominal N, T7-T11 spinal nerves, Subcostal N, and L1 N( lumbar spinal nerve 1)

Question 3

Transversus Abdominis

Answer 3

O: internal surfaces of costal cartilages 7-12, thoracolumbar fascia, and iliac crest
I: linea alba with internal oblique, pubic crest, and pectineal line of pubis via conjoint tendon
A: flex and rotate trunk
N: thoracoabdominal N, T7-T11 spinal nerves, Subcostal N

Question 4

Rectus Abdominis

Answer 4

O: Xiphoid processes, costal cartilages 5-7
I: Pubic symphysis and pubic crest
A: flex trunk, assist in pelvic tilt
N: thoracoabdominal N, T7-T11 spinal nerves, Subcostal N