My understanding is that the term "mental retardation" is defined solely by ones' IQ. (This seemed to be the case when we were suing the state of Arizona to obtain state-subsidized housing for my developmentally disabled brother.) And a sub-normal IQ can happen several different ways - injury to various parts of the brain or just failure of the brain to fully develop. My guess is that an abnormal disposition (whether it be violent or sunny) depends on which part of the brain is causing the mental affliction. We might be able to correlate abnormal moods with specific areas of the brain, which would certainly be interesting.
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timeasmymeasure
no subject
Date: 2006-05-06 02:19 pm (UTC)