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Fractionating the anterior temporal lobe: MVPA reveals differential responses to input and conceptual modality.

TitleFractionating the anterior temporal lobe: MVPA reveals differential responses to input and conceptual modality.
Publication TypeJournal Article
Year of Publication2017
AuthorsMurphy, C., Rueschemeyer S-A., Watson D., Karapanagiotidis T., Smallwood J., & Jefferies E.
JournalNeuroimage
Volume147
Pagination19-31
Date Published2017 02 15
ISSN1095-9572
KeywordsAdolescent, Adult, Auditory Perception, Brain Mapping, Cognition, Female, Healthy Volunteers, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Nerve Net, Neural Pathways, Neuroimaging, Psychomotor Performance, Reaction Time, Social Perception, Temporal Lobe, Young Adult
Abstract

Words activate cortical regions in accordance with their modality of presentation (i.e., written vs. spoken), yet there is a long-standing debate about whether patterns of activity in any specific brain region capture modality-invariant conceptual information. Deficits in patients with semantic dementia highlight the anterior temporal lobe (ATL) as an amodal store of semantic knowledge but these studies do not permit precise localisation of this function. The current investigation used multiple imaging methods in healthy participants to examine functional dissociations within ATL. Multi-voxel pattern analysis identified spatially segregated regions: a response to input modality in anterior superior temporal gyrus (aSTG) and a response to meaning in more ventral anterior temporal lobe (vATL). This functional dissociation was supported by resting-state connectivity that found greater coupling for aSTG with primary auditory cortex and vATL with the default mode network. A meta-analytic decoding of these connectivity patterns implicated aSTG in processes closely tied to auditory processing (such as phonology and language) and vATL in meaning-based tasks (such as comprehension or social cognition). Thus we provide converging evidence for the segregation of meaning and input modality in the ATL.

DOI10.1016/j.neuroimage.2016.11.067
Alternate JournalNeuroimage
PubMed ID27908787
PubMed Central IDPMC5315053
Grant List283530 / / European Research Council / International
BB/J006963/1 / / Biotechnology and Biological Sciences Research Council / United Kingdom

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