ArticleProceedings. Biological sciences2019
Primate hippocampus size and organization are predicted by sociality but not diet.
Article in Proceedings. Biological sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- Creation of an MRI-Based Three-Dimensional Common Wombat (Vombatus ursinus) Brain Atlas and Linking Brain Morphometry to Wombat Behaviour.Anatomia, histologia, embryologia · 2026Article
- But how does it smell? An investigation of olfactory bulb size among living and fossil primates and other euarchontoglirans.Anatomical record (Hoboken, N.J. : 2007) · 2026Article
- Article
- Cranial anatomy, palaeoneurology, palaeobiology and stratigraphic age of the large-bodied ornithopod,PeerJ · 2026Article
- Traces of phylogeny and ecology in hippocampal neuron numbers.PNAS nexus · 2025Article
- Evolution of cellular architecture and function of the hippocampus: insights from the artificial selection experiment.Biology letters · 2025Article
- Avian telencephalon and cerebellum volumes can be accurately estimated from digital brain endocasts.Biology letters · 2025Article
- NECAB1-3, parvalbumin, calbindin, and calretinin in the hippocampus of the European mole.Frontiers in neuroanatomy · 2024Article
- Both Diet and Sociality Affect Primate Brain-Size Evolution.Systematic biology · 2023Article
- From fossils to mind.Communications biology · 2023Review
- Cell numbers in the reflected blade of CA3 and their relation to other hippocampal principal cell populations across seven species.Frontiers in neuroanatomy · 2022Article
- Testing hypotheses of marsupial brain size variation using phylogenetic multiple imputations and a Bayesian comparative framework.Proceedings. Biological sciences · 2021Article
- Quantification of neurons in the hippocampal formation of chimpanzees: comparison to rhesus monkeys and humans.Brain structure & function · 2020Article
- Description of the koala (Frontiers in neurologyArticle
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Authors and funding
5 authors.
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Abstract
The hippocampus is well known for its roles in spatial navigation and memory, but it is organized into regions that have different connections and functional specializations. Notably, the region CA2 has a role in social and not spatial cognition, as is the case for the regions CA1 and CA3 that surround it. Here, we investigated the evolution of the hippocampus in terms of its size and organization in relation to the evolution of social and ecological variables in primates, namely home range, diet and different measures of group size. We found that the volumes within the whole cornu ammonis coevolve with group size, while only the volume of CA1 and subiculum can also be predicted by home range. On the other hand, diet, expressed as a shift from folivory towards frugivory, was shown to not be related to hippocampal volume. Interestingly, CA2 was shown to exhibit phylogenetic signal only against certain measures of group size, but not with ecological factors. We also found that sex differences in the hippocampus are related to body size sex dimorphism. This is in line with reports of sex differences in hippocampal volume in non-primates that are related to social structure and sex differences in behaviour. Our findings support the notion that in primates, the hippocampus is a mosaic structure evolving in line with social pressures, where certain subsections evolve in line with spatial ability too.
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