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- W1985991621 abstract "The effect of chronic unpredictable mild stress on sensitivity to reward was evaluated using the brain self-stimulation procedure. Rats were allowed to electrically self-stimulate the ventral tegmental area, one of the main cerebral structures subserving positive reinforcement. Stimulation thresholds (frequency of stimuli) for self-stimulation responses were determined prior to, during, and following a 19-day period of exposure to a variety of mild unpredictable stressors. Stimulation threshold was increased in stressed rats, suggesting a decrease in the rewarding properties of brain stimulation. This deficit became evident after about 1 week of mild stress, lasted throughout the stress period, and progressively diminished following termination of the stress regime. In stressed rats concomitantly treated with the tricyclic antidepressant desipramine (5 mg/kg b.i.d.), no stress-induced increase in self-stimulation threshold was observed. However, desipramine did not modify self-stimulation threshold in non-stressed animals. Thus, the increased threshold for brain self-stimulation produced by a period of chronic unpredictable mild stress can be completely prevented by concominant antidepressant treatment and may provide an heuristic animal model of depression." @default.
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- W1985991621 date "1992-03-01" @default.
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- W1985991621 title "Antidepressant treatment prevents chronic unpredictable mild stress-induced anhedonia as assessed by ventral tegmentum self-stimulation behavior in rats" @default.
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- W1985991621 doi "https://doi.org/10.1016/0924-977x(92)90035-7" @default.
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