Show simple item record

dc.contributor.authorBracci, S.
dc.contributor.authorCaramazza, A.
dc.contributor.authorPeelen, M. V.
dc.date.accessioned2019-09-22T10:39:55Z
dc.date.issued2015
dc.identifier.citationBracci, S., A. Caramazza, and M. V. Peelen. 2015. “Representational Similarity of Body Parts in Human Occipitotemporal Cortex.” Journal of Neuroscience 35 (38): 12977–85. https://doi.org/10.1523/jneurosci.4698-14.2015.
dc.identifier.issn0270-6474
dc.identifier.issn1529-2401
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41384848*
dc.description.abstractRegions in human lateral and ventral occipitotemporal cortices (OTC) respond selectively to pictures of the human body and its parts. What are the organizational principles underlying body part responses in these regions? Here we used representational similarity analysis (RSA) of fMRI data to test multiple possible organizational principles: shape similarity, physical proximity, cortical homunculus proximity, and semantic similarity. Participants viewed pictures of whole persons, chairs, and eight body parts (hands, arms, legs, feet, chests, waists, upper faces, and lower faces). The similarity of multivoxel activity patterns for all body part pairs was established in whole person-selective OTC regions. The resulting neural similarity matrices were then compared with similarity matrices capturing the hypothesized organizational principles. Results showed that the semantic similarity model best captured the neural similarity of body parts in lateral and ventral OTC, which followed an organization in three clusters: (1) body parts used as action effectors (hands, feet, arms, and legs), (2) noneffector body parts (chests and waists), and (3) face parts (upper and lower faces). Whole-brain RSA revealed, in addition to OTC, regions in parietal and frontal cortex in which neural similarity was related to semantic similarity. In contrast, neural similarity in occipital cortex was best predicted by shape similarity models. We suggest that the semantic organization of body parts in high-level visual cortex relates to the different functions associated with the three body part clusters, reflecting the unique processing and connectivity demands associated with the different types of information (e.g., action, social) different body parts (e.g., limbs, faces) convey.
dc.language.isoen_US
dc.publisherSociety for Neuroscience
dash.licenseLAA
dc.titleRepresentational Similarity of Body Parts in Human Occipitotemporal Cortex
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Journal of Neuroscience - The Official Journal of the Society for Neuroscience
dash.depositing.authorCaramazza, Alfonso::c81ff36e5d3b388155ee7e7d91ece706::600
dc.date.available2019-09-22T10:39:55Z
dash.workflow.comments1Science Serial ID 111842
dc.identifier.doi10.1523/JNEUROSCI.4698-14.2015
dash.source.volume35;38
dash.source.page12977-12985


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record