Submitted by: Submitted by yourmomdotcom
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Date Submitted: 03/01/2016 05:18 AM
Stroke Case Study
1. Ischemia: An inadequate blood supply to an organ or part of the body. Infarction: The obstruction of blood supply to an organ or region of tissue, causing local death of the tissue.
2. A stroke is a “brain attack” that occurs when blood flow to an area of brain is cut off. When this happens, brain cells are deprived of oxygen and begin to die. When brain cells die during a stroke, abilities controlled by that area of the brain such as memory and muscle control are lost. The two stroke mechanisms are ischemic strokes and hemorrhagic strokes. Ischemic strokes are more common, and occur when there is an occlusion of a blood vessel impairing the flow of blood into the brain. Hemorrhagic strokes are more serious because in addition to the interruption of blood supply to the target tissue, the hemorrhage can also cause increasing intracranial pressure which can physically impinge on brain tissue, further impairing perfusion of the cerebrum.
3. In the heart, collateral vessels can help to supply blood flow to the ischemic regions caused by stenosis or occlusion of epicardial arteries. Collateral blood flow may be an important mechanism helping to limit infarct size in the heart when a large coronary artery suddenly becomes occluded by a thrombus.
4. Stroke risk factors: age, heredity, race, sex, prior stroke, TIA, or heart attack. The “Five Sudden, Severe Symptoms”: numbness, confusion, trouble seeing on one side, sever difficulty walking or loss of coordination, and severe headache. Mr. Dexter suffered from confusion and difficulty walking.
5. A brodman area is a region of the cerebral cortex defined by its histological structure and organization of cells. Brodman areas are defined based solely on their neuronal organization. The brodman map identifies 45 specific areas in the normal human brain, and their function.
6. In the left hemisphere of the brain there is a neural loop that is involved in both understanding and producing spoken...