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ischemia - correct answer ✔✔ part of the brain that results in death of brain cells; lack of
perfusion results in lack of oxygen and nutrients (brain cannot be deprived more than 3-4
minutes before injury occurs)
What determines the manifestations of the brain ischemia? - correct answer ✔✔ effects
dependent on location and severity
penumbra - correct answer ✔✔ around the core of ischemia is a border of decreased blood
flow; this level of ischemia is potentially reversible; however, you have to work quickly to restore
oxygen and nutrients to this area
cause of ischemia - correct answer ✔✔ result from inadequate blood flow to the brain from
partial or complete occlusion of an artery
types of ischemia - correct answer ✔✔ 1. thrombotic
2. embolic
3. hemorrhagic (intracerebral and subarachnoid)
thrombotic ischemia - correct answer ✔✔ presence of a blood clot that leads to an occlusion
embolic ischemia - correct answer ✔✔ loose plague, air, long bone fracture (fat embolus)
causes ischemia
, hemorrhagic stroke - correct answer ✔✔ result from bleeding into the brain tissue or into the
subarachnoid space
two types of hemorrhagic strokes - correct answer ✔✔ 1. Intracerebral hemorrhage
2. Subarachnoid hemorrhage
signs and symptoms of a stroke - correct answer ✔✔ -Sudden numbness or weakness of the
face, arm or leg, especially on one side of the body
-Sudden confusion, trouble speaking or understanding
-Sudden trouble seeing in one or both eyes
-Sudden trouble walking, dizziness, loss of balance or coordination
-Sudden, severe headache with no known cause
non-modifiable risk factors for strokes - correct answer ✔✔ 1. age (more commonly seen in
those over the age of 65: more plague buildup)
2. gender (more women die from strokes: pregnancy and oral contraceptives put one more at
risk)
3. race (African Americans are more at risk)
4. heredity/family history
modifiable risk factors for strokes - correct answer ✔✔ -Hypertension (increased pressure in the
vessels)
-Diabetes/Metabolic Syndrome (thickened blood and stasis)
-Heart Disease (faulty perfusion)
-Heavy alcohol consumption (changes the composition of cells)
-Poor diet
-Obesity
-Drug abuse