L1 Anterolateral Abdominal Wall Flashcards
Which organs are contained in the right upper quadrant (RUQ)?
Which organs are contained in the left upper quadrant (LUQ)?
Which organs are contained in the right lower quadrant (RLQ)?
Which organs are contained in the Left lower quadrant (LLQ)?
What is the nerve supply to the muscles of the anterolateral abdominal wall?
Anterior rami of T7 - T12 spinal nerves
The anterolateral abdominal wall muscles produce what movements when contracting on one side?
ipsilateral lateral flexion of the trunk
(if internal oblique on one side and external oblique on the other side contract together, the trunk will rotate toward the internal oblique that is contracting)
What is the action of the pyramidalis muscle?
tense the linea alba
Name the superficial vessels of the anterolateral abdominal wall that arise from the femoral a.
- superficial epigastric
- superficial circumflex iliac
What are the deep arteries of the abdominal wall?
- Inferior epigastric
- superior epigastric
- Deep circumflex iliac
veins accompany
(not to be confused with superficial epigastric!)
What are the main contributors to the thoracoepigastric vein? What is the purpose of the thoracoepigastric vein?
- superficial epigastric v. and lateral thoracic v.
- collateral venous return
what are the 2 layers (distal to the umbilicus) of fascia?
- Camper
- Scarpa
(Scarpa continuous with scrotum–>extravasated urine from ruptured penile urethra or infection may spread upwards)
Name the 5 muscles of the anterolateral abdominal wall.
External oblique
Internal oblique
Transverse abdominals
Rectus abdominus
Pyramidalis
What direction do the fibers of the internal obliques run?
What direction do the fibers of the external obliques run?
- superomedially
- inferomedially
What is the inguinal ligament formed by?
Rolled under, free-margin of the external oblique aponeurosis
Internal oblique muscle arises from the _______.
Thoracolumbar aponeurosis
What forms the rectus sheath?
aponeuroses of the 3 flat abdominal muscles.
