acute brain disorder

Medical Dictionary

acute brain disorder n.
An organic brain syndrome that is caused by temporary reversible impairment of brain functioning and is characterized by mood changes that range from mild disorientation to delirium and can include more serious personality and behavior disturbances. Also called acute neuropsychologic disorder.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
acute brain disorder

noun
any disorder (as sudden confusion or disorientation) in an otherwise normal person that is due to reversible (temporary) impairment of brain tissues (as by head injuries or drugs or infection) 
WordNet® 3.0, © 2006 by Princeton University.
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