Journal
SCIENCE
Volume 308, Issue 5723, Pages 873-876Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1108905
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Funding
- Medical Research Council [G117/433] Funding Source: researchfish
- MRC [G117/433] Funding Source: UKRI
- Medical Research Council [G117/433] Funding Source: Medline
- Wellcome Trust [071248] Funding Source: Medline
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Memories are thought to be attractor states of neuronal representations, with the hippocampus a likely substrate for context-dependent episodic memories. However, such states have not been directly observed. For example, the hippocampal place cell representation of location was previously found to respond continuously to changes in environmental shape alone. We report that exposure to novel square and circular environments made of different materials creates attractor representations for both shapes: Place cells abruptly and simultaneously switch between representations as environmental shape changes incrementally. This enables study of attractor dynamics in a cognitive representation and may correspond to the formation of distinct contexts in context-dependent memory.
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