Impairment of synaptic plasticity and novel object recognition in the hypergravity-exposed rats

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Abstract

The gravity is necessary for living organisms to operate various biological events including hippocampus-related functions of learning and memory. Until now, it remains inconclusive how altered gravity is associated with hippocampal functions. It is mainly due to the difficulties in generating an animal model experiencing altered gravity. Here, we demonstrate the effects of hypergravity on hippocampus-related functions using an animal behavior and electrophysiology with our hypergravity animal model. The hypergravity (4G, 4 weeks) group showed impaired synaptic efficacy and long-term potentiation in CA1 neurons of the hippocampus along with the poor performance of a novel object recognition task. Our studies suggest that altered gravity affects hippocampus-related cognitive functions, presumably through structural and functional adaptation to various conditions of gravity shift.

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Lee, J., Jang, D., Jeong, H., Kim, K. sung, & Yang, S. (2020). Impairment of synaptic plasticity and novel object recognition in the hypergravity-exposed rats. Scientific Reports, 10(1). https://doi.org/10.1038/s41598-020-72639-7

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