Corticolimbic structural connectivity encapsulates real-world emotional reactivity and happiness.

Mijin Kim, Sunghyun Shin, Mina Jyung, Jong-An Choi, Incheol Choi, M Justin Kim, Sunhae Sul
Author Information
  1. Mijin Kim: Department of Psychology, Pusan National University, Busan 46241, South Korea.
  2. Sunghyun Shin: Department of Psychology, Pusan National University, Busan 46241, South Korea.
  3. Mina Jyung: Department of Psychology, Seoul National University, Seoul 088826, South Korea.
  4. Jong-An Choi: Department of Psychology, Kangwon National University, Chuncheon 24341, South Korea.
  5. Incheol Choi: Department of Psychology, Seoul National University, Seoul 088826, South Korea.
  6. M Justin Kim: Department of Psychology, Sungkyunkwan University, Seoul 03063, South Korea.
  7. Sunhae Sul: Department of Psychology, Pusan National University, Busan 46241, South Korea. ORCID

Abstract

Emotional reactivity to everyday events predicts happiness, but the neural circuits underlying this relationship remain incompletely understood. Here, we combined experience sampling methods and diffusion magnetic resonance imaging to examine the association among corticolimbic structural connectivity, real-world emotional reactivity and daily experiences of happiness from 79 young adults (35 females). Participants recorded momentary assessments of emotional and happiness experiences five times a day for a week, approximately 2 weeks after brain scanning. Model-based emotional reactivity scores, which index the degree to which moment-to-moment affective state varies with the occurrence of positive or negative events, were computed. Results showed that stronger microstructural integrity of the uncinate fasciculus and the external capsule was associated with both greater positive and negative emotional reactivity scores. The relationship between these fiber tracts and experienced happiness was explained by emotional reactivity. Importantly, this indirect effect was observed for emotional reactivity to positive but not negative real-world events. Our findings suggest that the corticolimbic circuits supporting socioemotional functions are associated with emotional reactivity and happiness in the real world.

Keywords

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Grants

  1. /Center for Happiness Studies at Seoul National University
  2. 2018R1C1B6007059 2021R1F1A1045988/National Research Foundation of Korea

MeSH Term

Female
Young Adult
Humans
Happiness
Emotions
Diffusion Magnetic Resonance Imaging
White Matter
Neuroimaging

Word Cloud

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