The Diaphragm

Question 1

Function of Diaphgragm

Answer 1

Main muscle of resp, raises intra-abdo pressure coughing, vom, and defecation

Question 2

Attachments of Diaphragm

Answer 2

• peripheral:
• lumbar verteb
• costal cartilage ribs7-12
• xiphoid process
• central tendon to pericardium
• medial, lateral arcuate ligament

Question 3

What is the diaphgragm

Answer 3

sheet of skeletal musc stretching across midline of body separating thorax and. abdo.

Question 4

Diaphragmatic hiatuses at vertebral levels and their bodies

Answer 4

inferior vena cava - T8: IVC, Right phrenic nerve
oesophagus - T10: Oes, Vagus nerve
aorta - T12: aorta, azygous, hemiazygous,thoracic duct

Question 5

Diapghragm innervation

Answer 5

paired phrenic nerves (C3-5) both motor and sensory. Lower intrcostal nerves provide sensory to periphery.

Question 6

Which dome is higher upon expiration

Answer 6

Right bc liver

Question 7

What are crura and their attachments?

Answer 7

Crurae are tendon parts of diaphgragm arising from the verteb. Right crura is larger attaching to L3-4 whereas L attach to L2-3.

Question 8

Sternocostal trriangle

Answer 8

hiatus transmiting lymph from liver and superior epigastric vessels

Question 9

Relationship of hiatuses and bodies they transmit

Answer 9

Caval hiatus affects IVC dilatation upon diagraphm contraction on inspiration. Oesoph. hiatus also constricts oesophagus at right crura w/ formation of muscle sphincter. Aorta doesn’t pierce.