diaphragm Flashcards
what is the origin and insertion of the diaphragm?
origin- the central tendon via the pericardiophrenic ligament
insertion- xyphoid process, coastal part (1-6 coastal cart.), lumbar (L1-L4)
inervation of the diaphragm
phrenic nerve c3,c4,c5
the parts of the diaphragm
muscular and tendinous part
the muscular part
- sternal > 2 slips post. side of the xyphoid process
- coastal > inner surface of lower 6 coastal cartilage
- lumbar > lateral and medial crus
parts of the lateral crus of the muscular part
formed by the Medial and Lateral arcuate ligament
parts of the medial crus of the muscular part
Right crus and left Crus
tendinous part has…
a central tendon fused via the percardiphrenic ligament
how is the esophageal hiatus formed
from the medial crus which is about the level of T10
the 2 medial crura left and right unite to form?
the median arcuate ligament
what are the arcuate ligaments
they are fascia’s covering the psoas major and quadratus lumborum
what are the openings of the diaphragm and what structures do these openings let in
- vena cava = IVC, right phrenic nerve
- esophageal hiatus = esophagus, ant. and post. vegus trunks
- aortic = descending aorta, thoracic duct
- medial crus = azygous vein, hemiazygous v. , greater splanchnic nerve
- medial and lateral crura =sympatheic trunk
- sternocoastal triangle = internal thoracic a. and v., sup. epigastric a. and v.
arteriole supply of the diagphragm
(from the internal thoracic) -pericardiophrenic a. -musculophrenic a. (from the descending aorta) -superior phrenic a -inferior phrenic a
common site for herniation in the diaphragm?
esophageal herniation
division of the lumbar part
- lateral crus
- medial crus
parts of the medial crus
left medial crus (L1-L2)
right medial crus (L1-L4)
