NIMH, the
National Institute of Mental Health, is a subunit of the
United States National Institutes of Health (
NIH). NIMH operates a
Web site at
http://www.nimh.nih.gov/, according to which, "The
mission of the National Institute of Mental Health (NIMH) is to
diminish the burden of mental illness through
research."
Whether or not NIMH scientists ever engaged in experiments to boost the intelligence of rats I do not know ... but many people seem to have first heard of NIMH through Robert C. O'Brien's semi-science-fiction book, Mrs. Frisby and the Rats of NIMH.