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Scale Space Calibrates Present and Subsequent Spatial Learning in Barnes Maze in Mice
Yuto Tachiki1, Yusuke Suzuki2,3,4, Mutsumi Kurahashi1,3,4
1Laboratory of Brain Development and Regeneration, Division of Systemic Life Science, Kyoto University Graduate School of Biostudies, Kyoto, 606-8501, Japan.
Eneuro
|May 11, 2023
Summary
Spatial learning in mice depends on the scale of the environment. Prior experience in a larger Barnes maze (BM3) improved learning in a smaller one (BM1), but not vice versa, revealing scale-dependent spatial memory.
Area of Science:
- Neuroscience
- Animal Behavior
- Cognitive Science
Background:
- Laboratory animals typically experience limited spatial scales.
- Extrapolating spatial learning from small to large environments is challenging.
- Understanding scale-dependent spatial representation is crucial.
Purpose of the Study:
- To investigate if spatial learning in the Barnes maze (BM) is influenced by environmental scale.
- To explore scale-dependent spatial learning and memory calibration in mice.
- To establish a system for studying neural mechanisms of scale representation.
Main Methods:
- Development of a 3-m diameter Barnes maze (BM3) alongside a conventional 1-m diameter BM (BM1).
- Comparative analysis of spatial learning rates and exploration strategies in BM1 and BM3.
- Assessment of cross-scale learning transfer and calibration effects.
Main Results:
- Spatial learning was established in BM3, albeit with a lower learning rate than in BM1.
- Mice in BM3 exhibited persistent place searching, unlike those in BM1.
- Prior learning in BM3 facilitated subsequent BM1 learning, demonstrating asymmetric calibration.
Conclusions:
- Environmental scale significantly calibrates spatial learning and memory in mice.
- Different exploration strategies are employed in varying spatial scales.
- The BM1 and BM3 system offers a valuable tool for investigating scale-dependent spatial representation and its neural basis.
