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  • Title: [Age-related features of the working capacity of rats during positive emotional reinforcement by hypothalamic self-stimulation].
    Author: Rushkevich IuE.
    Journal: Biull Eksp Biol Med; 1993 Jan; 115(1):3-4. PubMed ID: 8054569.
    Abstract:
    Some age-related peculiarities found in rats striving for hypothalamic self-stimulation: (1) the capacity in old rats decreased more rapidly during fatique than in adult ones; (2) some old but not adult animals died after hard physical work; (3) some old rats "working" for a longer time have done greater work, than adult ones.
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