Enhanced generalization and specialization of brain representations of semantic knowledge in healthy aging Article Swipe
Pedro Margolles
,
David Soto
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1101/2023.08.08.552519
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1101/2023.08.08.552519
Aging is often associated with a decrease in cognitive capacities. However, semantic memory appears relatively well preserved in healthy aging. Both behavioral and neuroimaging studies support the view that changes in brain networks contribute to this preservation of semantic cognition. However, little is known about the role of healthy aging in the brain representation of semantic categories. Here we used pattern classification analyses and computational models to examine the neural representations of living and non-living word concepts. The results demonstrate that brain representations of animacy in healthy aging exhibit increased similarity across categories, even across different task contexts. This pattern of results aligns with the neural dedifferentiation hypothesis that proposes that aging is associated with decreased specificity in brain activity patterns and less efficient neural resource allocation. However, the loss in neural specificity for different categories was accompanied by increased dissimilarity of item-based conceptual representations within each category. Taken together, the age-related patterns of increased generalization and specialization in the brain representations of semantic knowledge may reflect a compensatory mechanism that enables a more efficient coding scheme characterized by both compression and sparsity, thereby helping to optimize the limited neural resources and maintain semantic processing in the healthy aging brain.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.1101/2023.08.08.552519
- https://www.biorxiv.org/content/biorxiv/early/2023/08/12/2023.08.08.552519.full.pdf
- OA Status
- green
- References
- 117
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4385786697
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4385786697Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1101/2023.08.08.552519Digital Object Identifier
- Title
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Enhanced generalization and specialization of brain representations of semantic knowledge in healthy agingWork title
- Type
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preprintOpenAlex work type
- Language
-
enPrimary language
- Publication year
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2023Year of publication
- Publication date
-
2023-08-12Full publication date if available
- Authors
-
Pedro Margolles, David SotoList of authors in order
- Landing page
-
https://doi.org/10.1101/2023.08.08.552519Publisher landing page
- PDF URL
-
https://www.biorxiv.org/content/biorxiv/early/2023/08/12/2023.08.08.552519.full.pdfDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
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https://www.biorxiv.org/content/biorxiv/early/2023/08/12/2023.08.08.552519.full.pdfDirect OA link when available
- Concepts
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Semantic memory, Cognition, Psychology, Cognitive psychology, Neuroimaging, Computer science, NeuroscienceTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
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117Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| abstract_inverted_index.exhibit | 89 |
| abstract_inverted_index.healthy | 19, 49, 87, 198 |
| abstract_inverted_index.helping | 185 |
| abstract_inverted_index.limited | 189 |
| abstract_inverted_index.pattern | 61, 100 |
| abstract_inverted_index.reflect | 167 |
| abstract_inverted_index.results | 79, 102 |
| abstract_inverted_index.studies | 25 |
| abstract_inverted_index.support | 26 |
| abstract_inverted_index.thereby | 184 |
| abstract_inverted_index.Abstract | 0 |
| abstract_inverted_index.However, | 11, 41, 128 |
| abstract_inverted_index.activity | 120 |
| abstract_inverted_index.analyses | 63 |
| abstract_inverted_index.decrease | 7 |
| abstract_inverted_index.maintain | 193 |
| abstract_inverted_index.networks | 33 |
| abstract_inverted_index.optimize | 187 |
| abstract_inverted_index.patterns | 121, 153 |
| abstract_inverted_index.proposes | 110 |
| abstract_inverted_index.resource | 126 |
| abstract_inverted_index.semantic | 12, 39, 56, 164, 194 |
| abstract_inverted_index.category. | 148 |
| abstract_inverted_index.cognitive | 9 |
| abstract_inverted_index.concepts. | 77 |
| abstract_inverted_index.contexts. | 98 |
| abstract_inverted_index.decreased | 116 |
| abstract_inverted_index.different | 96, 135 |
| abstract_inverted_index.efficient | 124, 175 |
| abstract_inverted_index.increased | 90, 140, 155 |
| abstract_inverted_index.knowledge | 165 |
| abstract_inverted_index.mechanism | 170 |
| abstract_inverted_index.preserved | 17 |
| abstract_inverted_index.resources | 191 |
| abstract_inverted_index.sparsity, | 183 |
| abstract_inverted_index.together, | 150 |
| abstract_inverted_index.associated | 4, 114 |
| abstract_inverted_index.behavioral | 22 |
| abstract_inverted_index.categories | 136 |
| abstract_inverted_index.cognition. | 40 |
| abstract_inverted_index.conceptual | 144 |
| abstract_inverted_index.contribute | 34 |
| abstract_inverted_index.hypothesis | 108 |
| abstract_inverted_index.item-based | 143 |
| abstract_inverted_index.non-living | 75 |
| abstract_inverted_index.processing | 195 |
| abstract_inverted_index.relatively | 15 |
| abstract_inverted_index.similarity | 91 |
| abstract_inverted_index.accompanied | 138 |
| abstract_inverted_index.age-related | 152 |
| abstract_inverted_index.allocation. | 127 |
| abstract_inverted_index.capacities. | 10 |
| abstract_inverted_index.categories, | 93 |
| abstract_inverted_index.categories. | 57 |
| abstract_inverted_index.compression | 181 |
| abstract_inverted_index.demonstrate | 80 |
| abstract_inverted_index.specificity | 117, 133 |
| abstract_inverted_index.compensatory | 169 |
| abstract_inverted_index.neuroimaging | 24 |
| abstract_inverted_index.preservation | 37 |
| abstract_inverted_index.characterized | 178 |
| abstract_inverted_index.computational | 65 |
| abstract_inverted_index.dissimilarity | 141 |
| abstract_inverted_index.classification | 62 |
| abstract_inverted_index.generalization | 156 |
| abstract_inverted_index.representation | 54 |
| abstract_inverted_index.specialization | 158 |
| abstract_inverted_index.representations | 71, 83, 145, 162 |
| abstract_inverted_index.dedifferentiation | 107 |
| cited_by_percentile_year | |
| corresponding_author_ids | https://openalex.org/A5089374180 |
| countries_distinct_count | 1 |
| institutions_distinct_count | 2 |
| corresponding_institution_ids | https://openalex.org/I4210104355 |
| sustainable_development_goals[0].id | https://metadata.un.org/sdg/8 |
| sustainable_development_goals[0].score | 0.44999998807907104 |
| sustainable_development_goals[0].display_name | Decent work and economic growth |
| citation_normalized_percentile.value | 0.12970973 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |