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Question 1

What nerve innervates the Anterior and Lateral muscles of the Abdominal Wall?

Answer 1

Ventral Rami of T7-T12 Spinal Nerves

ALSO L1 in the cases of the Internal Oblique and Transversus Abdominus

Question 2

What nerve innervates the Posterior muscles of the Abdominal Wall?

Answer 2

QL- Ventral Rami T12-L4
Iliacus- Femoral Nerve
Psoas Major- Ventral Rami L1-L3

Question 3

Superficial Blood supply to the Anterolateral Abdominal Wall:

Answer 3

“SMP I SEA SCI LATER”

1. Superior- Musculophrenic Artery (from Internal Thoracic Artery)
2. Inferior- Superficial Epigastric Artery (Medial from Femoral Artery) and Superficial Circumflex Iliac Artery (Lateral from Femoral Artery)

Question 4

Deep Blood supply to the Anterolateral Abdominal Wall:

Answer 4

1. Superficial- Superior Epigastric Artery (off Internal Thoracic)
2. Inferior- Inferior Epigastric Artery (Medial from External Iliac) and Deep Circumflex Iliac Artery (Lateral from External Iliac)
3. Lateral- 10th and 11th Intercostal Arteries

Question 5

Lymphatic Drainage of the Abdomen:

Answer 5

“SAN I-SIN DPN”

1. Superficial to the Umbilicus drains Superficially to the AXILLARY NODES
2. Inferior to the Umbilicus drains to Superficial Inguinal Nodes
3. Deep drainage to Parasternal Nodes

Question 6

What are the borders of the Inguinal Triangle?

Answer 6

1. Medial- Rectus Abdominus
2. Lateral- Inferior Epigastric
3. Inferior- Inguinal Canal

Question 7

Where does the Aorta bifurcate and what does it branch into and what do they branch into?

Answer 7

“B4L”
Aorta> Right and Left Common Iliac Arteries> Internal and External Common Iliac Arteries > Internal Anterior Trunk and Posterior Trunk>

Anterior Trunk:

1. Umbilical Artery
2. Superior Vesicular Artery
3. Middle Rectal
4. Internal Pudendal
5. Uterine