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Title: Widespread and lateralized social brain activity for processing dynamic facial expressions
Authors: Sato, Wataru  KAKEN_id  orcid (unconfirmed)
Kochiyama, Takanori
Uono, Shota  KAKEN_id
Sawada, Reiko
Kubota, Yasutaka
Yoshimura, Sayaka  kyouindb  KAKEN_id  orcid (unconfirmed)
Toichi, Motomi  kyouindb  KAKEN_id
Author's alias: 佐藤, 弥
魚野, 翔太
澤田, 玲子
義村, さや香
Keywords: amygdala
dynamic facial expression
functional magnetic resonance imaging (fMRI)
inferior frontal gyrus
superior temporal sulcus
Issue Date: Sep-2019
Publisher: Wiley
Journal title: Human Brain Mapping
Volume: 40
Issue: 13
Start page: 3753
End page: 3768
Abstract: Dynamic facial expressions of emotions constitute natural and powerful means of social communication in daily life. A number of previous neuroimaging studies have explored the neural mechanisms underlying the processing of dynamic facial expressions, and indicated the activation of certain social brain regions (e.g., the amygdala) during such tasks. However, the activated brain regions were inconsistent across studies, and their laterality was rarely evaluated. To investigate these issues, we measured brain activity using functional magnetic resonance imaging in a relatively large sample (n = 51) during the observation of dynamic facial expressions of anger and happiness and their corresponding dynamic mosaic images. The observation of dynamic facial expressions, compared with dynamic mosaics, elicited stronger activity in the bilateral posterior cortices, including the inferior occipital gyri, fusiform gyri, and superior temporal sulci. The dynamic facial expressions also activated bilateral limbic regions, including the amygdalae and ventromedial prefrontal cortices, more strongly versus mosaics. In the same manner, activation was found in the right inferior frontal gyrus (IFG) and left cerebellum. Laterality analyses comparing original and flipped images revealed right hemispheric dominance in the superior temporal sulcus and IFG and left hemispheric dominance in the cerebellum. These results indicated that the neural mechanisms underlying processing of dynamic facial expressions include widespread social brain regions associated with perceptual, emotional, and motor functions, and include a clearly lateralized (right cortical and left cerebellar) network like that involved in language processing.
Rights: This is the peer reviewed version of the following article: Sato, W, Kochiyama, T, Uono, S, et al. Widespread and lateralized social brain activity for processing dynamic facial expressions. Hum Brain Mapp. 2019; 40: 3753– 3768., which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
The full-text file will be made open to the public on 2 August 2020 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1002/hbm.24629
PubMed ID: 31090126
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