[1] Anterior Abdominal Wall Flashcards
Function: Anterior Abdominal Wall (5)
- Protect/Support Viscera
- Trunk Movement
- Diagnose Disease (“Mirror”)
- Increase Intra-abdominal Pressure
- Ambulation
Superior Limits of AAW
Costal Margins
Xiphoid Process
Inferior Limits of AAW
ASIS
Inguinal Ligament
Pubic Crest
Symphysis
Lateral Limits of AAW
Vertical plane through ASIS
Best area to cut through during abdominal surgery?
Why?
Linea alba
It is relatively bloodless
Level of Subcostal Plane
L3
Level of Transtubercular Plane
L5
Level of Sagittal Plane
Midpoints of Clavicle and Inguinal Ligament
Level of Transpyloric Plane
L1, L2
Level of Transumbilical Plane
L3, L4
Which superficial fascia is fatty?
Which one is membranous?
Camper’s Fascia: Fatty
Scarpa’s Fascia: Membranous
Layers of the AAW In Order
- Skin
- Superficial Fascia
- Deep Fascia
- Muscles
- Trasversalis Fascia
- Extraperitoneal Fat
- Peritoneum
[External Oblique]
What direction do the fibers project?
Inferomedial
[Intenral Oblique]
What direction do the fibers project?
Superomedially mostly, however the lower layers start projecting inferomedially
Internal Oblique + Transversus Abdominis = ?
Conjoint Tendon
Rectus Sheath has contributions from?
External and Internal Oblique, Transversus Abdominis
Medial Separation of the Rectus Abdominis
Linea Alba
Lateral Separation of the Rectus Abdominis
Linea Semilunaris
Is the posterior rectus sheath complete?
No it is not. It ends inferiorly as the arcuate line/linea semicircularis
Innervation of the Abdominal Wall
Ventral Rami of T5-L1