DR. HASSAN SHAIBAH Diaphragm. Diaphragm Function: Primary muscle of respiration Increase vertical...
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Transcript of DR. HASSAN SHAIBAH Diaphragm. Diaphragm Function: Primary muscle of respiration Increase vertical...
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DR. HASSAN SHAIBAH
Diaphragm
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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)
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Diaphragm features:
has:
1)Muscular part
2)central tendon part
(support heart)
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DiaphragmSeparate
thora
xabdom
en
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Level may vary according to:
• respiration• Setting vs. standing• distention of abdominal
viscera)
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JFrom side shape like inverted J
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Dome shaped muscle
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Right dome higher than left
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1)Sternal part
“post. Xiphiod process”
2) Costal part lower 6 rips
3)Vertebral part2 crura and ligaments
Has 3 origin:
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central tendon part
Insertion
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Right crus1st 3 lumbar
1
2
3Left crus1st 2 lumbar
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Has 3 ligaments
1)Median arcuate ligament ( 2 curua connected) Cross over Aorta
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1
2
2) Medial arcuate ligament L2 to TP of L1
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1
2
3)Lateral arcuate ligament L1 to TP 12th rib
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3 main Openings:
Caval
Esophageal
Aortic
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Location of the 3 main Openings
I Ate (8) 10 Eggs At Midnight (12)
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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
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Caval opening
IVC & branch from RT phrenic n
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Esophageal opening
• Esophagus
• Vagus• esophage
al branch from left gastric vessels
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Aortic opening
• Aorta• thoracic
duct • Somtime
Azygos vein
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Nerve supply
Motor phrenic nerve (C3-5)
Sensory :1)Central part by phrenic n.
2)Peripheral part lower 6 intercostal nerves
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