PSYC 3530 Chapter Notes -Habenula, Intellectual Disability, Red Nucleus
17 Sep 2013
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Document Summary
Stroke - an interruption of blood to the brain that kills brain cells and causes the sudden appearance of neurological symptoms. Worldwide, stroke is the second leading cause of death. Ischemia - a deficiency of blood flow to the brain due to functional constriction or to the actual obstruction of a blood vessel, such as by a clot. An anticlotting drug decreases tissue death in ischemic stroke but aggravates cell death in hemorrhagic stroke. The neurons in the brain are organized in layers as well as in groups called nuclei, groups of cells forming clusters that can be visualized with special stains to identify a functional grouping. Structures that lie on the same side are ipsilateral; if they lie on opposite sides, they are contralateral to each other. If one of them lies in each hemisphere, the structures are bilateral. Structures that are close to one another are proximal; those far from one another are distal.
