BIO SCI 37 Lecture Notes - Lecture 4: Stroke, Blood Vessel, Perfusion
28 May 2016
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Document Summary
Cns accounts for about 2% of the total body weight (brain + spinal cord approx. Cerebrovascular perfusion 20% of all oxygen and 50% of all glucose consumed goes to the brain: adequate blood flow to the cns must be maintained at all times. What is stroke: brain tissue is damaged from a sudden loss of blood flow, resulting in a loss of neurological function, no. 3 cause of death in the us (#1 heart disease, #2 cancer): on average, every 40 seconds, someone in the us experiences a stroke, stroke risk increases with age. For each decade after age 55, the risk of stroke doubles. Types of stroke ischemic stroke 80-85% of all strokes: blockage inside a blood vessel that deprives an area of the brain from glucose and oxygen, embolic or thrombotic, hemorrhagic stroke, 15-20, bleeding into or around brain. Ischemic stroke thrombotic atherosclerotic plaque occludes an artery.
