Abdominal Wall Flashcards Preview

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Flashcards in Abdominal Wall Deck (11):
1

External abdominal oblique

Proximal:
External surface of lower ribs

Distal:
Linea alba
Pubic tubercle
Anterior iliac crest

Nerve:
T7-T11 (thoracoabdominal nerves)
T12 (subcostal nerve)

Action:
Contralateral rotation of torso

2

Internal abdominal oblique

Proximal:
Thoracolumbar fascia
Iliac crest
Lateral inguinal ligament

Distal:
Lower ribs
Linea alba
Pubic crest
Pecten pubis

Nerve:
T6-T11 (thoracoabdominal nerves)
T12 (subcostal nerve)
L1 (iliohypogastric and ilioinguinal nerve)

Artery:
Subcostal arteries

Action:
Ipsilateral rotation
Compression of abdominal contents

3

Transversus abdominis

Proximal:
Internal surface of lower costal cartilages
Thoracolumbar fascia
Iliac crest
Lateral inguinal ligament

Distal:
Linea alba
Pubic crest
Pecten pubis

Nerve:
T6-T11 (thoracoabdominal nerves)
T12 (subcostal nerve)
L1 (iliohypogastric and ilioinguinal nerve)

Blood:
Subcostal arteries

Action:
Compression of abdominal contents

4

Rectus abdominis

Inferior:
Pubic symphysis
Body of pubis

Superior:
Costal cartilages

Nerve:
T7-T11 (thoracoabdominal arteries)
T12 (subcostal artery)

Artery:
Superior and inferior epigastric arteries

Action:
Flexion of the trunk

5

Cremaster

Contribution of the internal abdominal oblique

Nerve:
Genital branch of the genitofemoral nerve

6

What levels?

1. Ant. cutaneous branches of intercostal nerves

2. Subcostal nerve

3. Iliohypogastric and ilioinguinal nerves

1. T7 - T11

2. T12

3. L1

7

Dermatomes?

1. T7
2. T10
3. T12
4. L1

• T7 -> skin overlying tip of xyphoid process
• T10 -> skin of the umbilicus
• T12 -> skin superior pubic symphysis
• L1 -> skin overlying pubic symphysis

8

External spermatic fascia in a continuation of?

Aponeurosis of external abdominal oblique

9

Lacunar ligament formed by

medial fibers of inguinal ligament that turn posteriorly to attach to the pecten pubis

10

Cremaster muscle formed by contributions from

internal abdominal oblique muscle

11

Conjoint tendon

• Medial to superficial inguinal ring

• Formed by the fusion of the aponeuroses of internal oblique and transversus abdominis muscles