Definition of organic brain syndrome
: an acute or chronic mental dysfunction (such as Alzheimer's disease) resulting chiefly from physical changes in brain structure and characterized especially by impaired cognition
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“Organic brain syndrome.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/organic%20brain%20syndrome. Accessed 17 Oct. 2021.
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The first known use of organic brain syndrome was in 1966
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