Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms
The rodent hippocampus represents different spatial environments distinctly via changes in the pattern of “place cell” firing. It remains unclear, though, how spatial remapping in rodents relates more generally to human memory. Here participants retrieved four virtual reality environments with repea...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
eLife Sciences Publications Ltd
2015-11-01
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| Series: | eLife |
| Subjects: | |
| Online Access: | https://elifesciences.org/articles/10499 |
| _version_ | 1811236847719809024 |
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| author | Colin T Kyle Jared D Stokes Jennifer S Lieberman Abdul S Hassan Arne D Ekstrom |
| author_facet | Colin T Kyle Jared D Stokes Jennifer S Lieberman Abdul S Hassan Arne D Ekstrom |
| author_sort | Colin T Kyle |
| collection | DOAJ |
| description | The rodent hippocampus represents different spatial environments distinctly via changes in the pattern of “place cell” firing. It remains unclear, though, how spatial remapping in rodents relates more generally to human memory. Here participants retrieved four virtual reality environments with repeating or novel landmarks and configurations during high-resolution functional magnetic resonance imaging (fMRI). Both neural decoding performance and neural pattern similarity measures revealed environment-specific hippocampal neural codes. Conversely, an interfering spatial environment did not elicit neural codes specific to that environment, with neural activity patterns instead resembling those of competing environments, an effect linked to lower retrieval performance. We find that orthogonalized neural patterns accompany successful disambiguation of spatial environments while erroneous reinstatement of competing patterns characterized interference errors. These results provide the first evidence for environment-specific neural codes in the human hippocampus, suggesting that pattern separation/completion mechanisms play an important role in how we successfully retrieve memories. |
| first_indexed | 2024-04-12T12:16:12Z |
| format | Article |
| id | doaj.art-eee08dba94bf480ebe33945acb6f9ec3 |
| institution | Directory Open Access Journal |
| issn | 2050-084X |
| language | English |
| last_indexed | 2024-04-12T12:16:12Z |
| publishDate | 2015-11-01 |
| publisher | eLife Sciences Publications Ltd |
| record_format | Article |
| series | eLife |
| spelling | doaj.art-eee08dba94bf480ebe33945acb6f9ec32022-12-22T03:33:26ZengeLife Sciences Publications LtdeLife2050-084X2015-11-01410.7554/eLife.10499Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanismsColin T Kyle0Jared D Stokes1Jennifer S Lieberman2Abdul S Hassan3Arne D Ekstrom4Center for Neuroscience, University of California, Davis, Davis, United StatesCenter for Neuroscience, University of California, Davis, Davis, United States; Department of Psychology, University of California, Davis, Davis, United StatesCenter for Neuroscience, University of California, Davis, Davis, United StatesCenter for Neuroscience, University of California, Davis, Davis, United StatesCenter for Neuroscience, University of California, Davis, Davis, United States; Department of Psychology, University of California, Davis, Davis, United StatesThe rodent hippocampus represents different spatial environments distinctly via changes in the pattern of “place cell” firing. It remains unclear, though, how spatial remapping in rodents relates more generally to human memory. Here participants retrieved four virtual reality environments with repeating or novel landmarks and configurations during high-resolution functional magnetic resonance imaging (fMRI). Both neural decoding performance and neural pattern similarity measures revealed environment-specific hippocampal neural codes. Conversely, an interfering spatial environment did not elicit neural codes specific to that environment, with neural activity patterns instead resembling those of competing environments, an effect linked to lower retrieval performance. We find that orthogonalized neural patterns accompany successful disambiguation of spatial environments while erroneous reinstatement of competing patterns characterized interference errors. These results provide the first evidence for environment-specific neural codes in the human hippocampus, suggesting that pattern separation/completion mechanisms play an important role in how we successfully retrieve memories.https://elifesciences.org/articles/10499NavigationMemoryCA3CA1MVPAfMRI |
| spellingShingle | Colin T Kyle Jared D Stokes Jennifer S Lieberman Abdul S Hassan Arne D Ekstrom Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms eLife Navigation Memory CA3 CA1 MVPA fMRI |
| title | Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms |
| title_full | Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms |
| title_fullStr | Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms |
| title_full_unstemmed | Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms |
| title_short | Successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms |
| title_sort | successful retrieval of competing spatial environments in humans involves hippocampal pattern separation mechanisms |
| topic | Navigation Memory CA3 CA1 MVPA fMRI |
| url | https://elifesciences.org/articles/10499 |
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