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  • Title: Gerbils exhibit stable open-arms exploration across repeated testing on the elevated plus-maze.
    Author: Rico JL, Penagos-Gil M, Castañeda AF, Corredor K.
    Journal: Behav Processes; 2016 Jan; 122():104-9. PubMed ID: 26621258.
    Abstract:
    Repeated testing on the elevated plus-maze (EPM) leads rats and mice to avoid the open-arms of the apparatus. The effect of multiple exposures to the EPM on the behavioral profile of gerbils is unknown. In this study, young and middle-aged gerbils were exposed to the EPM and four retests were carried out 24, 48, 72 and 96h after the first trial in order to determine whether animals exhibited open-arms avoidance. In addition, groups of young and middle-aged gerbils were exposed to the EPM for 20-min followed by a 5-min retest trial 24h apart to analyze the effect of a prolonged exposure to the EPM on open-arms exploration during first trial and retest. Gerbils exhibited high exploration of open-arms during the first trial and progressive locomotor decrease across repeated testing. Unlike previous reports for rats and mice, young gerbils showed a stable open-arms exploration both across multiple exposures and during a prolonged exposure to EPM. Middle-aged gerbils also exhibited a stable open-arms exploration during retest prior to the 20-min test. Results suggest a reliable repeated test paradigm for the EPM using our proposed methodology for gerbils.
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