L3: Anterior Abodminal Wall

Question 1

What are the 4 layers from superficial to deep of the anterior abdominal wall (AAW)?

Answer 1

Skin
Superficial fascia
Muscle layers
Peritoneum

Question 2

What are the 3 paired muscles of AAW?

Answer 2

External oblique
Internal oblique
Transversus abdominis

Question 3

What are the 2 supporting muscles of AW?

Answer 3

Rectus abdominis

Quadratus lumborum

Question 4

Which arteries upper regions of AAW?

Answer 4

Superior epigastric

Musculophrenic

Question 5

What type of nerve supply goes to skin?

Answer 5

Somatic sensory

Question 6

What type of nerve supply goes to muscles?

Answer 6

Somatic motor

Question 7

What type of nerve supply goes to parietal peritoneum?

Answer 7

Somatic sensory

Question 8

What structure is formed at the aponeurosis of the 3 flat muscles in linea alba?

Answer 8

Rectus sheath

Question 9

Above the umbillicus in rectus sheath what structures are:

1) anterior?
2) posterior?

Answer 9

1) Anterior: apoN of external oblique, anterior lamina of internal oblique apoN
2) Posterior: posterior lamina of internal oblique apoN, transversus abdominis, transversalis fascia, peritoneum

Question 10

Below the umbillicus in rectus sheath what structures are:

1) anterior?
2) posterior?

Answer 10

1) Anterior: apoN of external oblique, apoN of internal oblique, transversus abdominis
2) Posterior: transversalis fascia, peritoneum

Question 11

What does the arcuate line separate?

Answer 11

Above and below umbillicus of rectus sheath