The diaphragm

Question 1

Parts of diaphragm

Answer 1

Muscular part:

• sternal
• costal
• Lumbar

Tendinous part:
forming lateral crus and medial crus

Question 2

Medial crus

Answer 2

Divided into right and left.

Right longer (L1-L4)--> right medial crus form eso hiattus
Left shorter (L1-L2)

Question 3

Lateral crus

Answer 3

medail arcuate lig ( L1- transverse process of L2), cover psoas major

lateral arcuate ligament ( transverse process of L1- tip of 12 rib). covers quadratus lumborum

Question 4

Apertures of diaphram

Answer 4

Caval: T8, IVC + right phrenic

Esophageal: T10, esophagus + vagal trunk, left gastric vein.

Aortic hiatus: T12, aorta + thoracic duct

Sternocostal foramen : sup epigastric vessels

Intermediate hiatus: azygus, hemiazygus, greater + lesser splanchinic

Question 5

Arterial supply

Answer 5

sup phrenic ( thoracic aorta)
 Inf  phrenic a. (abdominal aorta)
musculophrenic+ pericardiophrenic  ( internal thoracic)

Question 6

innervation of diaphragm

Answer 6

Phrenic nerve