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• W3121885909 endingPage "173115" @default.
• W3121885909 startingPage "173115" @default.
• W3121885909 abstract "Selective serotonin transport (SERT) inhibitors such as fluoxetine are the most commonly prescribed treatments for depression. Although efficacious for many symptoms of depression, motivational impairments such as psychomotor retardation, anergia, fatigue and amotivation are relatively resistant to treatment with SERT inhibitors, and these drugs have been reported to exacerbate motivational deficits in some people. In order to study motivational dysfunctions in animal models, procedures have been developed to measure effort-related decision making, which offer animals a choice between high effort actions leading to highly valued reinforcers, or low effort/low reward options. In the present studies, male and female rats were tested on two different tests of effort-based choice: a fixed ratio 5 (FR5)/chow feeding choice procedure and a running wheel (RW)/chow feeding choice task. The baseline pattern of choice differed across tasks for males and females, with males pressing the lever more than females on the operant task, and females running more than males on the RW task. Administration of the SERT inhibitor and antidepressant fluoxetine suppressed the higher effort activity on each task (lever pressing and wheel running) in both males and females. The serotonin receptor mediating the suppressive effects of fluoxetine is uncertain, because serotonin antagonists with different patterns of receptor selectivity failed to reverse the effects of fluoxetine. Nevertheless, these studies uncovered important sex differences, and demonstrated that the suppressive effects of fluoxetine on high effort activities are not limited to tasks involving food reinforced behavior or appetite suppressive effects. It is possible that this line of research will contribute to an understanding of the neurochemical factors regulating selection of voluntary physical activity vs. sedentary behaviors, which could be relevant for understanding the role of physical activity in psychiatric disorders." @default.
• W3121885909 created "2021-02-01" @default.
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• W3121885909 date "2021-03-01" @default.
• W3121885909 modified "2023-10-18" @default.
• W3121885909 title "Sex differences in lever pressing and running wheel tasks of effort-based choice behavior in rats: Suppression of high effort activity by the serotonin transport inhibitor fluoxetine" @default.
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• W3121885909 doi "https://doi.org/10.1016/j.pbb.2021.173115" @default.
• W3121885909 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33493546" @default.
• W3121885909 hasPublicationYear "2021" @default.
• W3121885909 type Work @default.

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