Journal
SOCIAL NEUROSCIENCE
Volume 16, Issue 4, Pages 448-465Publisher
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.1080/17470919.2021.1944908
Keywords
fMRI; reciprocal imitation; EBA; hand gesture; vocalization; facial expression
Categories
Funding
- Japan Society for the Promotion of Science [17K17766]
- Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT)
- [10J01339]
- Grants-in-Aid for Scientific Research [17K17766] Funding Source: KAKEN
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The extrastriate body area (EBA) in the lateral occipito-temporal cortex plays an important role in detecting congruence between self and other's actions regardless of the type of action. The study suggests that EBA may contribute to detecting congruence, and that initiating and responding to interaction may be processed differently within the EBA.
The extrastriate body area (EBA) in the lateral occipito-temporal cortex has an important role in reciprocal interaction, as it detects congruence between self and other's hand actions. However, it is unclear whether the EBA can detect congruence regardless of the type of action. In the present study, we examined the neural substrate underlying congruence detection of three types of actions: hand gestures, vocalizations, and facial expressions. A univariate analysis revealed a congruency effect, especially for imitating action, for all three types of actions in the EBA. A multi-voxel pattern analysis classifier in the EBA was able to distinguish between initiating interaction from responding to interaction in all experiments. Correspondingly, the congruency effect in the EBA revealed by univariate analysis was stronger for responding to than for initiating interaction. These findings suggest that the EBA might contribute to detect congruence regardless of the body part used (i.e. face or hand) and the type of action (i.e. gestural or vocal). Moreover, initiating and responding to interaction might be processed differently within the EBA. This study highlights the role of the EBA in comparing between self and other's actions beyond hand actions. Running head: Function of EBA in reciprocal imitation
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