ArticleBrain imaging and behavior2019
Altered grey matter volume in 'super smellers'.
Article in Brain imaging and behavior, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.
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Who cites it
4 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Olfactory dysfunction in aging and neurodegenerative diseases.Ageing research reviews · 2021Pooled it
- Olfactory processing in gifted and non-gifted children: assessing the sniffin' sticks olfactory test for threshold, discrimination, and identification abilities.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025Article
- Insula and Olfaction: A Literature Review and Case Report.Brain sciences · 2021Article
- Greater hippocampal gray matter volume in subjective hyperosmia: a voxel-based morphometry study.Scientific reports · 2020Article
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Authors and funding
5 authors.
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Abstract
'Super smellers' are those individuals who show a heightened sense of smell. Data on the structural neuroanatomy of this phenomenon are still missing. A voxel-based morphometry study was conducted in order to compare gray matter volume (GMV) in specific brain regions of the olfactory network (piriform/entorhinal cortex, orbitofrontal cortex, insula, hippocampus) between 25 male 'super smellers' and 20 normosmic men. Participants were assigned to these groups based on their scores on a standardized olfactory performance test. Relative to normosmic men, 'super smellers' showed increased GMV in the anterior insula and in the hippocampus (dentate gyrus). These regions are crucial for the integration of olfactory information as well as odor learning and odor memory. Moreover, positive correlations between hippocampal volume and olfactory performance were detected in both groups. Future research should elaborate on how much of the observed neuroanatomical pattern of 'super smellers' is genetic and how much of it reflects experienced-based GMV increase.
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