期刊
FRONTIERS IN BEHAVIORAL NEUROSCIENCE
卷 16, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fnbeh.2022.854486
关键词
PTSD; stress; animal emotionality; social bonding; animal disease model; behavioral test; behavioral analysis; anterior cingulate cortex
资金
- JSPS KAKENHI Grant [JP 16J10077]
- OIST
This study investigated the gradual emergence of stress reactions in mice through detailed behavioral analysis, finding that the observed behavioral changes were a result of stress incubation and required social bonding. Morphological changes in specific regions of the cortex also supported this finding. The non-invasive analytical methods used in this study may have applications beyond laboratory animals.
While stress reactions can emerge long after the triggering event, it remains elusive how they emerge after a protracted, seemingly stress-free period during which stress incubates. Here, we study the behavioral development in mice isolated after observing an aggressive encounter inflicted upon their pair-housed partners. We developed a spatially resolved fine-scale behavioral analysis and applied it to standard behavioral tests. It reveals that the seemingly sudden behavioral changes developed gradually. These behavioral changes were not observed if the aggressive encounter happened to a stranger mouse, suggesting that social bonding is a prerequisite for stress incubation in this paradigm. This finding was corroborated by hemisphere-specific morphological changes in cortex regions centering at the anterior cingulate cortex, a cognitive and emotional center. Our non-invasive analytical methods to capture informative behavioral details may have applications beyond laboratory animals.
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