1what is the origin of the quadratus lumborum
medial half of inferior border of 12th rib and tips of lumbar transverse processes
2what is the insertion of the quadratus lumborum
iliolumbar ligament and internal lip of iliac crest
3what is the innervation of the quadratus lumborum
anterior branches of T12 and L1-L4 nerves
4what are the actions of the quadratus lumborum
entends and laterally flexes vertebral column. Fixes 12th rib during inspiration
5what is the origin of the iliacus
superior two thirds of iliac fossa, ala of sacrum and anterior sacro-iliac ligaments
6what is the insertion of the iliacus
lesser trochanter of femur and shaft inferior to it
7what is the innervation of the iliacus
femoral nerve (L2-L4)
8what are the actions of the iliacus
flexes thigh and stabalizes hip joint; acts with psoas major
9what is the origin of the psoas major
transverse processes of lumbar vertebrae; sides of vertebral bodies of T12-S1
10what is the insertion of the psoas major
lesser trochanter of femur
11what is the innervation of the psoas major
anterior rami of lumbar nerves L1-L3
12what are the actions of the psoas major
acting inferiorly - flexes thigh; acting superiorly - flexes vertebral column laterally to balance trunk; when sitting acts inferiorly to flex trunk
13what is the origin of the psoas minor
sides of vertebral bodies of T12-L1
14what is the insertion of the psoas minor
pectineal line and iliopubic eminence
15what is the innervation of the psoas minor
L1
16what is the action of the psoas minor
weak trunk flexor