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Related Flashcards
Cards In This Set
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Name the ligaments of the diaphragm.
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Medial arcuate ligamentLateral arcuate ligamentMedian arcuate ligamentRight and left cruraCentral tendon
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Name the openings of the diaphragm and their locations.
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Caval opening - T8, to the right of midlineEsophageal hiatus - T10, in the right crura, but still to the right of the aortic hiatusAortic hiatus - T12, not a part of the diaphragmGap for the psoas muscle - underneath the medial arcuate ligament
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T/F. The aorta moves with respiration since it is associated with the diaphragm.
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FALSE. The aorta exits posterior to the diaphragm, so it does not move with the diaphragm during respiration. The IVC and the esophagus do move with the diaphragm.
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T/F. The central tendon of the diaphragm attaches to the sternum.
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FALSE. The central tendon is the aponeurotic portion of the diaphragm, and has no bony attachments.
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Right and left crura
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Musculotendinous portions of the diaphragm that form the opening of the aortic hiatus
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Aortic hiatus
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Formed by the right and left crura on either side, and connected by the median arcuate ligament superiorly
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Medial arcuate ligament
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Creates passageway for the psoas muscle
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Lateral arcuate ligament
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Creates passageway for the quadratus lumborum muscle
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What passes through the caval opening?
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IVCLymphaticsRight phrenic nerve
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What passes through the esophageal hiatus?
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EsophagusEsophageal plexusEsophageal branch of the left gastric arteryLymphaticsVagal trunks
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What passes through the aortic hiatus?
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AortaThoracic ductAzygos & hemiazygos veins
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What are the relationships of the different openings in the diaphragm?
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Caval opening is to the right of midline and most superior at T8.Esophageal hiatus is to the left and superior to the aortic hiatus at T10.Aortic hiatus is most inferior at T12 and to the right of the esophageal hiatus but to the left of the caval opening.
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What other structures are related to the diaphragm?
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Left and right phrenic nervesGreater, lesser, and least splanchnicsSympathetic trunkInferior phrenic arteries
(Note: the sympathetic trunk and least splanchnics pass deep to the medial arcuate ligament, while the greater and lesser splanchnics have their own openings) |
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What arteries supply the diaphragm?
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Superior (thoracic) side = musculophrenic arteries, pericardiophrenic arteriesInferior (abdominal) side = inferior phrenic arteries (usually the first branches off of the abdominal aorta)
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Venous drainage of the diaphragm.
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Most of the venous drainage of the diaphragm follows the arteries, except for the left inferior phrenic vein.The right inferior phrenic vein drains into the IVC. The left inferior phrenic vein is usually double, with one branch passing anterior to the esophageal hiatus to tend in the IVC and the other posterior branch joining the left suprarenal vein.
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