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Coma - Medical Encyclopedia (Site not responding. Last check: 2007-11-05) |
 | | In medicine, a coma is a profound state of unconsciousness, which may result from a variety of conditions including intoxication (drug, alcohol or toxins), metabolic abnormalities (hypoglycemia, hyperglycemia, ketosis, etc.), central nervous system diseases, stroke, head trauma, seizures, and hypoxia. |
 | | The difference between coma and stupor is that a patient with coma cannot give a suitable response to either noxious or verbal stimuli, whereas a patient in a stupor can give a rough response (like screaming) to a noxious stimulus. |
 | | In astronomy, a coma is the tail of a comet produced by vapor boiled off the comet as it nears the sun. |
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