Abdominal Region

Question 1

Which of the following muscles can be easily seen anteriorly in the abdominal region in a well-developed individual?

A. Internal oblique
B. Rectus abdominis
C. External oblique

Answer 1

B

Question 2

Which structure marks the location of the T10 dermatome?

Answer 2

Umbilicus

Question 3

Which muscles are considered flat muscles of the anterolateral abdominal wall? Which are vertical?

Answer 3

FLAT
External oblique
Internal oblique
Transversus abdominis

VERTICAL
Rectus abdominis

Question 4

How is the rectus sheath formed?

Answer 4

Interweaving of apononeuroses of the three flat muscles (external oblique, internal oblique, transversus abdominis). Forms two leaflets (layers):

Anterior: External oblique, internal oblique
Posterior: Internal oblique, transversus abdominis

Question 5

Which muscles of the abdomen produce flexion of the vertebral column?

Answer 5

Rectus abdominis
Internal oblique
External oblique

Question 6

Which muscles produce rotation of the vertebral column?

Answer 6

External oblique
Internal oblique

Question 7

Which nerves innervate the muscles of the anterolateral abdominal wall?

Answer 7

Thoracoabdominal nerves

Question 8

What nerves provide sensory innervation of the skin of the abdominal region?

Answer 8

Cutaneous branches of ventral rami of spinal nerves

Question 9

What vessels supply the abdominal walls with blood?

Answer 9

Branches of internal thoracic artery, thoracic and abdominal aorta, and external iliac and femoral arteries:
- Musculophrenic
- Epigastric arteries
- Circumflex iliac arteries
- Posterior intercostal and Subcostal