What are the four muscles of the posterior abdominal wall
Psoas major, psoas minor, quadratus lumborum, iliacus
What is the origin of psoas major?
Transverse process of L1-L5, bodies of T12-L5 and intervertebral discs of T12-L4
What is the insertion of psoas major?
Middle surface of lesser trochanter of femur
What is the action of psoas major?
Flexes hip
What is the innervation of psoas major?
Anterior primary rami of L1,2
What is the blood supply of psoas major?
xxxxx?
What anatomic finding of note occurs within ??psoas?
The lumbar plexus lies within
What is the origin of psoas minor?
Bodies of T12-L1 and intervening intervertebral discs
What is the insertion of psoas minor?
Pectineal line of pubis and fascia over iliopsoas
What is the action of psoas minor?
Weak flexor of trunk
What is the innervation of psoas minor?
Anterior primary rami of L1
What is the origin of quadratus lumborum?
Inferior border of 12th rib
What is the insertion of quadratus lumborum?
Apices of transverse process of L1-4, iliolumbar ligament and posterior third of iliac crest
What is the action of quadratus lumborum?
Fixes 12th rib during respiration laterally flexes trunk
What is the innervation of quadratus lumborum?
Anterior primary rami of T12-L3
In which compartment is quadratus lumborum?
QL lies in the anterior compartment of the lumbar fascia
What is the origin of iliacus?
Iliac fossa within the abdomen
What is the insertion of iliacus?
Lowermost surface of lesser trochanter of femur
What is the action of iliacus?
Flexes hip
What is the innervation of iliacus?
Femoral nerve in the abdomen L2, L3
