1
Role of Blood Supply
Nutrition to parenchyma (brain cells).
Brain is completely dependent on oxygen supply - No O2 reserves.
Irreversible damage in 4-6 minutes if no oxygen
Brain requires 20% of O2 for 2% of body weight.
Brain requires glucose for energy
No ability to use fat
Remove carbon dioxide and waste-products from cells
Cerebral perfusion
] 60 ml/100gr min-1 in Gray matter
40 [ X [ 60 in White matter
750mL blood pumped per minute and circulated blood returned for reoxygenation
2
Vascular Network
Network of arteries and veins
Arteries carry blood away from the heart
Arteries divide into smaller vessels called: arterioles
Arterioles divide further into capillaries
Vascular Network
Veins carry blood toward the heart
Smallest level are venules that are connected to capillaries
Venules Carry blood to sinuses on cortical surface
3
Local blood flow
Arteries
Arterioles
Capillaries
Venules
Sinuses
4
Cerebrovascular Supply
....
[신경계 질환별 물리치료] 뇌와 척수질환의 종류와 임상 양상 뇌와 척수질환의 종류와 임상 양상
1. 뇌혈관 손상에 따른 특징내경동맥은 두 개강 속으로 들어와 후교통동맥, 전대뇌동맥과 중대뇌동맥 등으로 나누어지며, 양쪽의 추골동맥은 교뇌의 아래쪽에서 합쳐져 기저동..