Diaphragm

Question 1

What are the openings in the diaphragm

Answer 1

T8 - Vena Cava
T10- Oesophagus
T12- Aortic hiatus

Question 2

Where is the T8 opening in the diaphargm located and what passes through it

Answer 2

Central tendon

IVC
Right phrenic nerve

Question 3

Where is the T10 opening in the diaphragm found and what passes through it?

Answer 3

Right crus

Oesophagus
Vagus nerve

Question 4

Where is the T12 opening of the diaphragm found and what passes through it?

Answer 4

Behind the median arcuate ligament

Aorta
Azygous vein
Thoracic duct

Question 5

Where does the diaphragm originate from?

Answer 5

Sternal part
- xiphoid process of the sternum

Costal part
- inner surface of the lower 6 costal cartilages

Vertebral part - crura and arcuate ligament
- right crus (L1, L2, L3)
- left crus (L1, L2)
- median arcuate ligament (between the 2 crura
- medial arcuate ligament (extends from the side of the boyd of L1 to the tip of the transverse process of L2)
- lateral arcuate ligament (extends from the tip of the transverse process of L1 and inserts into the lower border of the 12th rib)

Question 6

Where is the insertion, innervation, blood supply of the diaphragm and what is its action?

Answer 6

Insertion - central aponeurotic tendon

Actions - inspiration and forced expiration

Innervation - phrenic nerve (C3,4,5)

Blood supply
- inferior phrenic artery