1. Diaphragm
Dr. Hassan Shaibah

2. Diaphragm Function: Primary muscle of respiration
Increase vertical diameter of thoracic cavity
Increases abdominal pressure )Urinations, defecations & Parturition “Childbirth”)
Weight lifting
Thoracoabdominal pump ( blood & lymph back to the heart)

5. 2)central tendon part (support heart)
Diaphragm features:
has:
1)Muscular part
2)central tendon part (support heart)

6. thorax
Diaphragm Separate
abdomen

7. Level may vary according to:
respiration
Setting vs. standing
distention of abdominal viscera)

8. J
From side shape like inverted J

9. Dome shaped muscle

10. Right dome higher than left

11. 1)Sternal part “post. Xiphiod process”
Has 3 origin:
1)Sternal part “post. Xiphiod process”
2) Costal part lower 6 rips
3)Vertebral part
2 crura and ligaments

12. Insertion
central tendon part

13. 1 2 3
Left crus
1st 2 lumbar
Right crus
1st 3 lumbar

14. Has 3 ligaments 1)Median arcuate ligament ( 2 curua connected)
Cross over Aorta

15. 1 2
2) Medial arcuate ligament
L2 to TP of L1

16. 1 2
3)Lateral arcuate ligament
L1 to TP 12th rib

17. 3 main Openings:
Caval
Esophageal
Aortic

18. Location of the 3
main Openings
I Ate (8) 10 Eggs At Midnight (12)

20. Structures passing through the openings
Aortic T12 Aorta , thoracic duct & Azygos vein
Sympathetic trucks pass posterior to Medial arcuate ligament
Superior epigastric vessels between sternal and costal part

21. Caval opening
IVC & branch from RT phrenic n

22. Esophageal opening Esophagus Vagus
esophageal branch from left gastric vessels

23. Aortic opening
Aorta
thoracic duct
Somtime Azygos vein

24. Nerve supply Motor phrenic nerve (C3-5) Sensory :
1)Central part by phrenic n.
2)Peripheral part lower 6 intercostal nerves