1. Place cells on a maze encode routes rather than destinations.
- Author
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Grieves, Roddy M., Wood, Emma R., and Dudchenko, Paul A.
- Subjects
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PLACE cells (Neurons) , *HIPPOCAMPUS (Brain) , *PYRAMIDAL neurons , *GOAL (Psychology) , *LABORATORY rodents - Abstract
Hippocampal place cells fire at different rates when a rodent runs through a given location on its way to different destinations. However, it is unclear whether such firing represents the animal's intended destination or the execution of a specific trajectory. To distinguish between these possibilities, Lister Hooded rats (n = 8) were trained to navigate from a start box to three goal locations via four partially overlapping routes. Two of these led to the same goal location. Of the cells that fired on these two routes, 95.8% showed route-dependent firing (firing on only one route), whereas only two cells (4.2%) showed goal-dependent firing (firing similarly on both routes). In addition, route-dependent place cells over-represented the less discriminable routes, and place cells in general over-represented the start location. These results indicate that place cell firing on overlapping routes reflects the animal's route, not its goals, and that this firing may aid spatial discrimination. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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