Birth order and prosociality in the early adolescent brain

Abstract Birth order is a crucial environmental factor for child development. For example, later-born children are relatively unlikely to feel secure due to sibling competition or diluted parental resources. The positive effect of being earlier-born on cognitive intelligence is well-established. How...

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Autores principales:	Naohiro Okada, Yu Yamamoto, Noriaki Yahata, Susumu Morita, Daisuke Koshiyama, Kentaro Morita, Kingo Sawada, Sho Kanata, Shinya Fujikawa, Noriko Sugimoto, Rie Toriyama, Mio Masaoka, Shinsuke Koike, Tsuyoshi Araki, Yukiko Kano, Kaori Endo, Syudo Yamasaki, Shuntaro Ando, Atsushi Nishida, Mariko Hiraiwa-Hasegawa, Charles Yokoyama, Kiyoto Kasai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3b692839aca6406d878ddb37f18310d3
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spelling	oai:doaj.org-article:3b692839aca6406d878ddb37f18310d32021-11-14T12:20:07ZBirth order and prosociality in the early adolescent brain10.1038/s41598-021-01146-02045-2322https://doaj.org/article/3b692839aca6406d878ddb37f18310d32021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01146-0https://doaj.org/toc/2045-2322Abstract Birth order is a crucial environmental factor for child development. For example, later-born children are relatively unlikely to feel secure due to sibling competition or diluted parental resources. The positive effect of being earlier-born on cognitive intelligence is well-established. However, whether birth order is linked to social behavior remains controversial, and the neural correlates of birth order effects in adolescence when social cognition develops remain unknown. Here, we explored the birth order effect on prosociality using a large-scale population-based adolescent cohort. Next, since the amygdala is a key region for sociality and environmental stress, we examined amygdala substrates of the association between birth order and prosociality using a subset neuroimaging cohort. We found enhanced prosociality in later-born adolescents (N = 3160), and observed the mediating role of larger amygdala volume (N = 208) and amygdala-prefrontal functional connectivity with sex-selective effects (N = 183). We found that birth order, a non-genetic environmental factor, affects adolescent social development via different neural substrates. Our findings may indicate the later-born people’s adaptive survival strategy in stressful environments.Naohiro OkadaYu YamamotoNoriaki YahataSusumu MoritaDaisuke KoshiyamaKentaro MoritaKingo SawadaSho KanataShinya FujikawaNoriko SugimotoRie ToriyamaMio MasaokaShinsuke KoikeTsuyoshi ArakiYukiko KanoKaori EndoSyudo YamasakiShuntaro AndoAtsushi NishidaMariko Hiraiwa-HasegawaCharles YokoyamaKiyoto KasaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Naohiro Okada Yu Yamamoto Noriaki Yahata Susumu Morita Daisuke Koshiyama Kentaro Morita Kingo Sawada Sho Kanata Shinya Fujikawa Noriko Sugimoto Rie Toriyama Mio Masaoka Shinsuke Koike Tsuyoshi Araki Yukiko Kano Kaori Endo Syudo Yamasaki Shuntaro Ando Atsushi Nishida Mariko Hiraiwa-Hasegawa Charles Yokoyama Kiyoto Kasai Birth order and prosociality in the early adolescent brain
description	Abstract Birth order is a crucial environmental factor for child development. For example, later-born children are relatively unlikely to feel secure due to sibling competition or diluted parental resources. The positive effect of being earlier-born on cognitive intelligence is well-established. However, whether birth order is linked to social behavior remains controversial, and the neural correlates of birth order effects in adolescence when social cognition develops remain unknown. Here, we explored the birth order effect on prosociality using a large-scale population-based adolescent cohort. Next, since the amygdala is a key region for sociality and environmental stress, we examined amygdala substrates of the association between birth order and prosociality using a subset neuroimaging cohort. We found enhanced prosociality in later-born adolescents (N = 3160), and observed the mediating role of larger amygdala volume (N = 208) and amygdala-prefrontal functional connectivity with sex-selective effects (N = 183). We found that birth order, a non-genetic environmental factor, affects adolescent social development via different neural substrates. Our findings may indicate the later-born people’s adaptive survival strategy in stressful environments.
format	article
author	Naohiro Okada Yu Yamamoto Noriaki Yahata Susumu Morita Daisuke Koshiyama Kentaro Morita Kingo Sawada Sho Kanata Shinya Fujikawa Noriko Sugimoto Rie Toriyama Mio Masaoka Shinsuke Koike Tsuyoshi Araki Yukiko Kano Kaori Endo Syudo Yamasaki Shuntaro Ando Atsushi Nishida Mariko Hiraiwa-Hasegawa Charles Yokoyama Kiyoto Kasai
author_facet	Naohiro Okada Yu Yamamoto Noriaki Yahata Susumu Morita Daisuke Koshiyama Kentaro Morita Kingo Sawada Sho Kanata Shinya Fujikawa Noriko Sugimoto Rie Toriyama Mio Masaoka Shinsuke Koike Tsuyoshi Araki Yukiko Kano Kaori Endo Syudo Yamasaki Shuntaro Ando Atsushi Nishida Mariko Hiraiwa-Hasegawa Charles Yokoyama Kiyoto Kasai
author_sort	Naohiro Okada
title	Birth order and prosociality in the early adolescent brain
title_short	Birth order and prosociality in the early adolescent brain
title_full	Birth order and prosociality in the early adolescent brain
title_fullStr	Birth order and prosociality in the early adolescent brain
title_full_unstemmed	Birth order and prosociality in the early adolescent brain
title_sort	birth order and prosociality in the early adolescent brain
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3b692839aca6406d878ddb37f18310d3
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Birth order and prosociality in the early adolescent brain

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