Hippocampal global remapping for different sensory modalities in flying bats
| Autor: | Nachum Ulanovsky, Liora Las, Sandro Romani, Maya Geva-Sagiv |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Nerve net Hippocampus Sensory system Human echolocation Hippocampal formation 03 medical and health sciences 0302 clinical medicine Stimulus modality Memory Chiroptera Path integration medicine Animals Neurons Behavior Animal General Neuroscience Subiculum 030104 developmental biology medicine.anatomical_structure Space Perception Nerve Net Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Nature Neuroscience. 19:952-958 |
| ISSN: | 1546-1726 1097-6256 |
| Popis: | 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 kinds of remapping: subiculum neurons turned on or off, while CA1 neurons shifted their place fields. Interneurons also exhibited strong remapping. Finally, hippocampal place fields were sharper under vision than echolocation, matching the superior sensory resolution of vision over echolocation. Simulating several theoretical models of place-cells suggested that combining sensory information and path integration best explains the experimental sharpening data. In summary, here we show sensory-based global remapping in a mammal, suggesting that the hippocampus does not contain an abstract spatial map but rather a 'cognitive atlas', with multiple maps for different sensory modalities. |
| Databáze: | OpenAIRE |
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