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STRUCTURE OF ANT. ABDOMINAL WALL:1.SKIN2.SUPER ...

공개

1 / 13 Q&A

What are the main layers of the anterior abdominal wall from superficial to deep?

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2 / 13 Q&A

Which nerves supply cutaneous innervation to the anterior abdominal wall?

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3 / 13 Q&A

Which abdominal muscles are supplied by the anterior rami of the lower 6 thoracic nerves?

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4 / 13 Q&A

What dermatome corresponds to the epigastrium over the xiphoid process?

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5 / 13 Q&A

Which dermatome includes the umbilicus?

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6 / 13 Q&A

Which dermatome supplies the area just above the inguinal ligament and symphysis pubis?

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7 / 13 Q&A

Name the arterial vessels supplying skin near the midline of the anterior abdominal wall.

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8 / 13 Q&A

Name the arterial vessels supplying the skin of the flanks.

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9 / 13 Q&A

Describe the venous network arrangement of the anterior abdominal wall around the umbilicus.

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10 / 13 Q&A

What is the significance of the paraumbilical veins in the anterior abdominal wall venous drainage?

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11 / 13 Q&A

Where do cutaneous lymph vessels above the level of the umbilicus drain?

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12 / 13 Q&A

Where do cutaneous lymph vessels below the level of the umbilicus drain?

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13 / 13 Q&A

Which deep lymph nodes receive drainage following the arteries of the anterior abdominal wall?

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Flashcards in this deck (13)

검색 중...

What are the main layers of the anterior abdominal wall from superficial to deep?
- Skin
- Superficial fascia
- Deep fascia
- Muscles
- Extraperitoneal fascia
- Parietal peritoneum
anatomy abdomen layers
Which nerves supply cutaneous innervation to the anterior abdominal wall?
- Anterior rami of lower 6 thoracic nerves (lower 5 intercostal and subcostal nerves)
innervation nerves abdomen
Which abdominal muscles are supplied by the anterior rami of the lower 6 thoracic nerves?
- External oblique
- Internal oblique
- Transversus abdominis
- Rectus abdominis
- Pyramidalis (T12 only)
muscles innervation abdomen
What dermatome corresponds to the epigastrium over the xiphoid process?
- T7
dermatome abdomen
Which dermatome includes the umbilicus?
- T10
dermatome abdomen
Which dermatome supplies the area just above the inguinal ligament and symphysis pubis?
- L1
dermatome abdomen
Name the arterial vessels supplying skin near the midline of the anterior abdominal wall.
- Superior epigastric (internal thoracic)
- Inferior epigastric (external iliac)
- Superficial epigastric (femoral)
- Lateral thoracic (axillary)
arterial abdomen midline
Name the arterial vessels supplying the skin of the flanks.
- Posterior intercostal (descending thoracic aorta)
- Lumbar (abdominal aorta)
- Deep circumflex iliac (external iliac)
- Superficial circumflex iliac (femoral)
arterial abdomen flank
Describe the venous network arrangement of the anterior abdominal wall around the umbilicus.
- Veins radiate out from the umbilicus
- Drained above into axillary/thoracic veins
- Drained below into femoral via superficial epigastric and great saphenous veins
venous abdomen umbilicus
What is the significance of the paraumbilical veins in the anterior abdominal wall venous drainage?
- Connect the superficial network through the umbilicus and ligamentum teres to the portal vein, forming portal-systemic anastomoses
venous portal anastomosis
Where do cutaneous lymph vessels above the level of the umbilicus drain?
- Anterior axillary lymph nodes
lymph abdomen
Where do cutaneous lymph vessels below the level of the umbilicus drain?
- Superficial inguinal lymph nodes
lymph abdomen
Which deep lymph nodes receive drainage following the arteries of the anterior abdominal wall?
- Internal thoracic
- External iliac
- Para-aortic (lumbar)
- Posterior mediastinal
lymph deep abdomen

학습 노트

Anterior abdominal wall — concise study notes

Layers (superficial → deep)

Skin
Superficial fascia (fatty and membranous layers)
Deep (investing) fascia over muscles
Muscles and their aponeuroses
Extraperitoneal (subserous) fascia
Parietal peritoneum

Muscles (anterior/lateral)

External oblique, internal oblique, transversus abdominis, rectus abdominis, pyramidalis (small; T12).
Muscles provide wall strength, form rectus sheath and inguinal region structures.

Nerve supply

Cutaneous motor and sensory supply from the anterior rami of lower 6 thoracic nerves: lower 5 intercostals (T7–T11) and subcostal (T12).
These nerves innervate skin, parietal peritoneum, and the anterior abdominal muscles.

Key dermatomes

T7: epigastrium, over xiphoid process.
T10: umbilicus (useful clinical landmark).
L1: skin just above the inguinal ligament and over the pubic symphysis.

Arterial supply

Midline/central supply:
Superior epigastric artery (branch of internal thoracic)
Inferior epigastric artery (branch of external iliac)
Superficial epigastric artery (from femoral)
Lateral thoracic artery (from axillary) supplies upper anterior skin laterally
Flank/lateral supply:
Posterior intercostal arteries (from thoracic aorta)
Lumbar arteries (from abdominal aorta)
Deep circumflex iliac artery (from external iliac)
Superficial circumflex iliac artery (from femoral)

Venous drainage

Superficial veins form a network radiating from the umbilicus.
Drain superiorly toward the thoracic/axillary veins.
Drain inferiorly toward the femoral vein via the superficial epigastric and great saphenous veins.
Paraumbilical veins connect the superficial network and ligamentum teres to the portal vein, creating important portal–systemic anastomoses (clinical: caput medusae in portal hypertension).

Lymphatic drainage

Superficial (cutaneous)
Above the umbilicus → anterior axillary (pectoral) lymph nodes.
Below the umbilicus → superficial inguinal lymph nodes.
Deep lymphatics follow arteries and drain to:
Internal thoracic nodes
External iliac nodes
Para-aortic (lumbar) nodes
Posterior mediastinal nodes

Clinical correlations (brief)

Dermatomes help localize visceral pain and incision placement (e.g., T10 for umbilicus).
Portal–systemic anastomoses at the umbilicus cause visible abdominal wall veins in portal hypertension (caput medusae).
Knowledge of epigastric vessels is essential to avoid bleeding in midline and lower abdominal incisions and hernia repairs.

High-yield summary

The anterior abdominal wall consists of six layers from skin to parietal peritoneum; motor/sensory supply is from T7–T12 (and L1 sensory contribution), arterial supply is segmental with midline and lateral sources, venous drainage includes superficial networks connected to the portal system, and lymph drains differently above vs below the umbilicus.

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STRUCTURE OF ANT. ABDOMINAL WALL:1.SKIN2.SUPER ...

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Flashcards in this deck (13)

Anterior abdominal wall — concise study notes

Layers (superficial → deep)

Muscles (anterior/lateral)

Nerve supply

Key dermatomes

Arterial supply

Venous drainage

Lymphatic drainage

Clinical correlations (brief)

High-yield summary