Muscles of posterior abdominal wall

Question 1

function of poses major

Answer 1

flexes hip, and vertebral column laterally , flexes trunk and used to balance trunk in sitting

Question 2

function of the iliacus

Answer 2

flexes hip
stabilises hip joint
acts wth posts major

Question 3

what nerve supplies the iliacus

Answer 3

femoral nerve ( L2,3,4)

Question 4

where does the psoas major muscle attach to

Answer 4

lesser trochanter of femur and transverse process of lumbar vertebrae

Question 5

do the iliacus and psoas muscle fuse to function as one muscle ? and what is this called

Answer 5

yes - iliopsoas

Question 6

where does the iliacus muscle attach to

Answer 6

iliac fossa and lesser trochanter of femur

Question 7

what nerve supplies the respiratory diaphragm

Answer 7

phrenic nerve - C3-5- draws central tendon down during respiration

Question 8

what does the quadrates lumborum do

Answer 8

extends and lateral flexes vertebral column - fixes 12th rib during inspiration

Question 9

can an infection of an intervertebral disc at the level os the psoas major ( T12-L5) lead to what?

Answer 9

psoas abscess - first appears at the superior orgin ( lumbar vertebrae) and can spread to beneath the sheath that covers muscle and extend inferiorly to the inguinal ligament