Muscles 3.1

Question 1

Diaphragm origin?

Answer 1

Crura, arcuate ligaments, internal surface of lower ribs, costal margin, xyphoid process

Question 2

Diaphragm insertion?

Answer 2

Central tendon

Question 3

Diaphragm action?

Answer 3

1) Contract for inspiration 2) relax for expiration 3) increase intra-abdominal pressure

Question 4

What is the origin for the median arcuate, medial arcuate, and lateral arcuate ligaments?

Answer 4

All originate off the diaphragm

Question 5

What is the innervation of the psoas minor?

Answer 5

Anterior ramus of L1

Question 6

What is the action of psoas minor?

Answer 6

Weak trunk flexor; Dr. Y thinks it does nothing

Question 7

What is the innervation of the psoas major?

Answer 7

Lumbar plexus

Question 8

What is the action of the psoas major?

Answer 8

Lateral flexion of the trunk; hip flexor (move thigh anteriorly)

Question 9

What is the innervation for the quadratus lumborum?

Answer 9

Anterior ramus of T12 and lumar plexus

Question 10

What is the action of quadratus lumborum?

Answer 10

Lateral flexor of trunk

Question 11

What is the shape and location to quadratus lumborum?

Answer 11

Lateral to minor/major psoas, rectangular

Question 12

What is the innervation of iliacus?

Answer 12

Femoral nerve

Question 13

What is the action of the iliacus?

Answer 13

Medial rotation of hip and hip flexor

Question 14

Where is the iliacus found?

Answer 14

On the inside of the hip bone, on ala surface of hip

Question 15

Iliacus is inferior to what muscle?

Answer 15

Quadratus lumborum

Question 16

What is the innervation of the iliopsoas muscle?

Answer 16

Anterior rami of L1-L3

Question 17

What is the action of the iliopsoas muscle?

Answer 17

Hip flexion

Question 18

The iliopsoas muscle is a continuation of?

Answer 18

The psoas major and the iliacus muscles. B/c they come together to insert jointly. So the part the CROSSES the hip joint is called the ilipsoas

Question 19

Diaphragm innervation?

Answer 19

Phrenic nerve