Diaphragm

Question 1

Origin of lumbar part

Answer 1

medial: L1-L3 vertebral bodies, IV disks, anterior longitudinal ligaments as R and L crura
lateral: lateral and medial arcuate ligament

Question 2

Origin of sternal part

Answer 2

xiphoid process

Question 3

Insertion of diaphragm

Answer 3

central tendon

Question 4

Innvervation of diaphragm

Answer 4

Phrenic nerve C3-C5 (motor and sensory)

subcostal and lower intercostal nerves (sensory)

Question 5

Action of diaphragm

Answer 5

Respiration, aids in compressing abdominal viscera

Question 6

Origin of costal part

Answer 6

7-12th ribs

Question 7

the diaphragm acts as a boundary for what other regions

Answer 7

floor of thorax
roof of abdomen
portion of poster abdominal wall

Question 8

what apertures are found in the diaphragm

Answer 8

IVC, esophagus, and aorta aperture

Question 9

what is crura

Answer 9

extension of posterior diaphragm

Question 10

where does crura attach

Answer 10

attaches to bodies of lumbar vertebrae

Question 11

caval aperture is for what to pass through and at what level

Answer 11

for the IVC at T8 vertebral level

Question 12

esophageal aperture is for what to pass through and at what level

Answer 12

esophagus
anterior and posterior vagal trunks
L gastric artery and vein
at T10 vertebral level

Question 13

esophageal aperture is formed by what

Answer 13

right crus

Question 14

contraction of esophageal aperture does what

Answer 14

forms a sphincter around the esophagus

Question 15

what goes through the aortic aperture and what is the pathway and level

Answer 15

passageway for aorta btwn R and L crura
thoracic duct and azygos and hemiazygos veins often pass through
passes behind diaphragm at T12

Question 16

Arterial blood supply

Answer 16

inferior phrenic arteries, branches of celiac trunk

superior phrenic, pericardiacophrenic, musculophrenic arteries (addtl)

Question 17

venous blood

Answer 17

drains to azygos system via posterior intercostal and superior phrenic veins