Semantic relevance explains category effects in medial fusiform gyri.

Abstract:

:We used functional Magnetic Resonance Imaging to explore the neural correlates of semantic relevance in 12 healthy participants performing a picture-naming task. In addition, we tested the hypothesis that category effects typically found in functional imaging can be partly explained in terms of different semantic relevance for animals and artefacts. We report that semantic relevance modulates neuronal responses in the medial fusiform gyrus bilaterally. As predicted, category effects in this region are strongly modulated by the semantic relevance of the items. Specifically, the effect of artefacts > animals is greatly reduced when the two categories are matched for semantic relevance. Thus, the present study demonstrates that neuronal responses during concept retrieval are modulated by the semantic relevance of the features. It also suggests that increased activation in the medial fusiform gyrus typically found for artefacts > animals can be explained by different semantic relevance for animal and artefact items.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Mechelli A,Sartori G,Orlandi P,Price CJ

doi

10.1016/j.neuroimage.2005.10.017

keywords:

subject

Has Abstract

pub_date

2006-04-15 00:00:00

pages

992-1002

issue

3

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(05)00808-6

journal_volume

30

pub_type

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