Posterior Abdominal Wall Flashcards
What is the origin and insertion of Psoas Major
Origin: Lateral aspect TP of T12-L5
Insertion: Lesser trochanterof femur
WHat is the innervation of Psoas Major?
L2-L4 (lumbar plexus)
What is the function of Psoas major?
Bilaterally flex thigh at hip.
Unilaterally: side-bend to same side
What is the orgin and insertion of Psoas Minor?
Origin: lateraal aspect of T12-L1
Insertion: superior pubic ramus at the distand end of pectinate line
What is the innervation of psoas minor?
L1-L2
What is the function of Psoas minor?
Depress rib 12 during inspiration. Fixes 12th rib (during inspiration)
Bilaterally assists with trunk extension
Unilaterally: side bend trunk to the same side
What are origin and insertion of Quadratus lumborum?
Origin: iliac crest and iliolumbar ligament.
Insertion: medial half of inferior border of 12th rib.
What is the innervation of quadratus lumborum M.?
T12-L4
What is the function of Quadratus lumborum:
Extends and laterally flexes vertebral column.
-Fixes Rib12 during inspiration
What is the lipsoas Test?
Patient lies on unaffected side and extend opposite thigh against resistance. It’s done to help with differential diagnosis. Becuase Psoas major and iliacus muscle have close relationship with many abdominal structures, injury to any of the abdominal strucutre may present with iliopsoas pain.
How does Psoas syndrome present?
- Lumbosacral pain
-difficulty standing up straight
-pain in the contralaeral gluteal region
-radiation of pain down the lower extremity (usually stops at knee)
-may mimic herniated disk
differential diagnosis could Appendicitis.
What are the three periphral origins that inset on the central tendon of the the respiratory diaphragm
- sternal origin
- costal origin
- vertebral origin
which crus forms the muscular esophageal hiatis?
The right crus of the aortia hiatus. The right crus is longer than the left.
What comes out of the caval opening of the respiratory diaphragm?
- IVC
- branches of right phrenic nerve
- lymphatics from liver
What comes through the esophageal hiatus?
- Esophagus
- Ant and Post vagal trunk
- Esophageal branches of Left gastric a.
What comes through the aortic hiatus?
- Aorta
- Thoracic duct
- azygos vein
What passes through the sternocostal hiatus?
Superior epigastric vessels.
What structure can you find at the opening of the median arcuate ligament:
aorta
What structure can you find at the opening of the medial arcuate ligament gap?
psoas major M