Medical Definition of hyperfunction
: excessive activity or function pituitary hyperfunction
hyperfunctional\-ˌfəŋ(k)-shnəl, -shən-əl\play adjective hyperfunctional adrenal glands
hyperfunctioning\-sh(ə-)niŋ\play noun … dopaminergic hyperfunctioning has been suggested as a cause of schizophrenia.—Richard J. Beninger et al., Science, 17 June 1983
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