Week 5B Flashcards
(24 cards)
What are the muscles of the abdominal wall?
psoas major psoas minor quadratus lumborum transversus abdominis lliacus
psoas major origin
lateral aspects and transverse processes of verterbral bodies and discs of T12-L5
psoas major insertion
lesser trochanter of femur via common tendon w iliacus (iliopsoas tendon)
psoas major nerve innervation
L2, L3, L4 via lumbar plexus
psoas major action
flexes thigh at hip; w feet fixed flexes trunk on thigh (at the hip joint) acting unilaterally side bends tunk to same side
psoas minor origin
lateral aspects of bodies of T12 and L1, plus their intervening discs
psoas minor insertion
pectineal line on eupserior ramus of rubis
psoas minor innervation
L1 and L2
psoas minor action
assist in extension and flexion of trunk; acting unilaterally side bends trunk to same side
most lateral muscle of the posterior abdominal wall
quadratus lumborum
quadratus lumborum origin
lilac crest and iliolumbar ligament
quadratus lumborum isertion
meidal half of inferior bodre of 12th rib; tips of lumbar transvers processes
quadratus lumborum Nerve
T12-L4
Quadratus lumborum action
extends and laterally flexes vertebral column; fixes rib 12 during inspiration
iliacus origin
iliac fossa of pelvis
iliacus insertion
lesser trochanter of fermur via common iliopsoas tendon
iliacus nerve
fermoral nerve (L2,3,4)
iliacus actions
flexes thigh at hip. with lower limb fixed, flexes pelvis on thigh
What are the boundaries of the respiratory diaphragm
- xiphisternal joint
- costal margin
- body of TV12
What are three peripheral origins insert on central tendon of the respiratory diaphragm
sternal origin
costal origin
lumbar origin
Right crus
longer
left crus
shorter
WHere does the left and right crus meet?
the aortic hiatus
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