Action Observation Network activity related to object-directed and socially-directed actions in Adolescents - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year : 2020

Action Observation Network activity related to object-directed and socially-directed actions in Adolescents

Mathieu Lesourd
Alia Afyouni
  • Function : Author
Franziska Geringswald
Fabien A Cignetti
Lisa Raoul
  • Function : Author
Julien Sein
Bruno Nazarian
Jean-Luc Anton
  • Function : Author

Abstract

The Action Observation Network (AON) encompasses brain areas consistently engaged when we observe other’s actions. Although the core nodes of the AON are present from childhood, it is not known to what extent they are sensitive to different action features during development. As social cognitive abilities continue to mature during adolescence, the AON response to socially-oriented actions, but not to object-related actions, may differ in adolescents and adults. To test this hypothesis, we scanned with functional magnetic resonance imaging (fMRI) 28 typically-developing teenagers and 25 adults while they passively watched videos of hand actions varying along two dimensions: sociality (i.e. directed towards another person or not) and transitivity (i.e. involving an object or not). We found that observing actions recruited the same fronto-parietal and occipito-temporal regions in adults and adolescents. The modulation of voxelwise activity by the social or transitive nature of the action was similar in both groups of participants. Multivariate pattern analysis, however, revealed that the accuracy in decoding the social dimension from the brain activity patterns, increased with age in lateral occipital and parietal regions, known to be involved in semantic representations of actions, as well as in posterior superior temporal sulcus, a region commonly associated with perception of high level features necessary for social perception. Change in decoding the transitive dimension was observed only in the latter region. These findings indicate that the representation of others’ actions, and in particular their social dimensions, in the adolescent AON is still not as robust as in adults.
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Dates and versions

hal-03084473 , version 1 (21-12-2020)

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Mathieu Lesourd, Alia Afyouni, Franziska Geringswald, Fabien A Cignetti, Lisa Raoul, et al.. Action Observation Network activity related to object-directed and socially-directed actions in Adolescents. 2020. ⟨hal-03084473⟩
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