Correlations between the brain responses of nulliparous females when viewing infants' facial expressions and their personality

[Speaker] Tanabe, Motoko:1
[Co-author] Niwano, Katsuko:1, Ito, Ayahito:1, Sato, Yosuke:1, Fujii, Toshikatsu:1
1:Tohoku Fukushi University (Japan)

Several fMRI studies have explored mother's brain response when viewing infants' facial expressions, but there are few studies focusing on young people's brain response. In this study, we investigated the correlations between the brain responses of young people when viewing infants' facial expressions and seven dimensional scores of the Temperament and Character Inventory (TCI). We used fMRI to scan 55 healthy nulliparous female volunteers (age M = 20.2, SD = 0.4). During fMRI, photographs of infant faces (happy, sad, and neutral) were presented to the participants in pseudo-randomized order. During the viewing of infants' sad and neutral faces, significant negative correlations were found between Persistence, one of the TCI, and the responses of various brain regions, including bilateral amygdala, bilateral orbitofrontal cortex, and bilateral ventromedial prefrontal cortex. These results suggest that patient people inhibit the activation of emotion-related regions when viewing sad faces.
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