Hippocampal global remapping for different sensory modalities in flying bats

  title={Hippocampal global remapping for different sensory modalities in flying bats},
  author={Maya Geva-Sagiv and Sandro Romani and Liora Las and Nachum Ulanovsky},
  journal={Nature Neuroscience},
Hippocampal place cells encode the animal's spatial position. However, it is unknown how different long-range sensory systems affect spatial representations. Here we alternated usage of vision and echolocation in Egyptian fruit bats while recording from single neurons in hippocampal areas CA1 and subiculum. Bats flew back and forth along a linear flight track, employing echolocation in darkness or vision in light. Hippocampal representations remapped between vision and echolocation via two… 

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Encoding of Head Direction by Hippocampal Place Cells in Bats

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The results suggest that spatial representation in mammalian hippocampus can be very rapidly modulated by external sensory and behavioral events.

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Spatial correlates of firing patterns of single cells in the subiculum of the freely moving rat

  • P. SharpC. Green
  • Biology, Psychology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1994
The results suggest that the subiculum transmits a robust, highly distributed spatial signal to each of its projection areas, and that this signal is transmitted in both a bursting and nonbursting mode.

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Multisensory Control of Hippocampal Spatiotemporal Selectivity

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The findings suggest that the subiculum is specialized to compress sparse hippocampal spatial codes into highly informative distributed codes suitable for efficient communication to other brain regions.

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The nature of hippocampal remapping can be predicted by ensemble dynamics in place-selective grid cells in the medial entorhinal cortex, one synapse upstream of the hippocampus, and is shown to be associated with stable grid fields.

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The experimental findings and theoretical models are reviewed that provide insight into the mechanisms that link sensory systems to spatial representations and to large-scale natural navigation.