Anterolateral Abdominal Wall Flashcards
Bony landmarks






Function of anterolateral wall muscles
–Mechanically support abdominal viscera
–Stretch to accommodate changes in cavity volume
–Compress cavity to assist in expiration, coughing, evacuation
–Flex/rotate/ lat. bend trunk

Rectus abdominus
Rectus abdominus attachments and innervation
Prox: Pubic tubercle & symphysis
Dist: 5-7th cost. cart., xiphoid
Inn: vent. ramiof T7-T12

External oblique muscles
External oblique muscles attachment and innervation
Prox: 5th-12thribs
Dist: lineaalba, pubic tubercle, iliac crest
Inn: vent. ramiof T7-T12

Internal oblique muscles
Internal oblique muscles attachments and innervation
Prox: TL fascia, iliac crest
Dist: 10th-12thribs, lineaalba, pubic tubercle
Inn: vent. rami of T7-T12, iliohypogastic and ilioinguinal NN (L1)

Transversus abdominus m
Transversus abdominus m attachments and innervation
Prox: 7th-12th cost cart, TL fascia, iliac crest
Dist: linea alba, pubic crest, pectin pubis
Inn: vent rami of T7-T12, iliohypogastic and ilioinguinal NN (L1)
Rectus sheath at or above umbilicus

Rectus sheath below umbilicus (arcuate line)

Contents of rectus sheath
- RectusabdominisM
- Sup/InfepigastricA/V
- Vent ramiof T7-T12






Dermatomes:
- levelof xiphoid process
- umbilicus
- pubic symphysis
- T6: levelof xiphoid process
- T10: umbilicus
- L1: pubic symphysis



Paraumbilical vein at umbilicus



Inguinal region attachments
Extends from ant sup iliac spine to pubic tubercle











