Content
Introduction 0:00
Diaphragm Function 0:10
Content 0:55
Lumbar Origin: 1:16
Costal Origin: 3:15
Sternal Origin: 3:26
Openings of the Diaphragm 3:56
Sternocostal Triangle 4:56
Lumbocostal Triangle (Bochdalek's Foramen) 5:16
Lumbar Openings 6:05
Coverings of the Diaphragm 6:18


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Diaphragm Parts:
Central Tendinous Part
Muscular Part
Main Muscle of Inspiration

Origin Points
Lumbar Part
Right Crus
crus dextrum
Left Crus
crus sinistrum
Suspensory Muscle of Duodenum
(Muscle of Treitz)
Lateral Arcuate Ligament
○ Quadratus Lumborum Muscle
Median Arcuate Ligament
○ Aorta
Medial Arcuate Ligament
○ Psoas Major Muscle
Costal Part
Sternal Part
Xiphoid Porcess of Sternum

Openings of the Diaphragm
Caval Opening
Foramen venae cavae
○ Inferior Vena Cava
○ Right Phrenic Nerve
Oesophageal Hiatus
Hiatus oesophageus
○ Esophagus
○ N. Vagus
Aortic Hiatus
Hiatus aorticus
○ Aorta
○ Thoracic Duct
Sternocostal Triangle
Trigonum sternocostale
○ Internal Thoracic Vein
○ Internal Thoracic Artery
Lumbocostal Triangle
Trigonum lumbocostale
○ ‘’Bochdalek's foramen’’
Lumbar Part
Pars lumborum
○ Sympathetic Trunk
○ Splanchnic Trunk
○ Azygos Vein

Coverings of the Diaphragm
Endothoracic Fascia
Fascia endothoracica
Diaphragmatic part of Parietal Pleua
Endoabdominal Fascia
Fascia endoabdominalis
Peritoneum