Mean diffusivity of globus pallidus associated with verbal creativity measured by divergent thinking and creativity-related temperaments in young healthy adults

Hikaru Takeuchi, Yasuyuki Taki, Atsushi Sekiguchi, Hiroshi Hashizume, Rui Nouchi, Yuko Sassa, Yuka Kotozaki, Carlos Makoto Miyauchi, Ryoichi Yokoyama, Kunio Iizuka, Seishu Nakagawa, Tomomi Nagase, Keiko Kunitoki, Ryuta Kawashima

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Recent investigations revealed mean diffusivity (MD) in gray matter and white matter areas is correlated with individual cognitive differences in healthy subjects and show unique properties and sensitivity that other neuroimaging tools donot have. In this study, we tested the hypothesis that the MD in the dopaminergic system is associated with individual differences in verbal creativity measured by divergent thinking (VCDT) and novelty seeking based on prior studies suggesting associations between these and dopaminergic functions. We examined this issue in a large sample of right-handed healthy young adults. We used analyses of MD and a psychological measure of VCDT, as well as personality measures of the Temperament and Character Inventory (TCI). Our results revealed associations between higher VCDT and lower MD in the bilateral globus pallidus. Furthermore, not only higher novelty seeking, but also lower harm avoidance, higher self-directedness, and higher self-transcendence were robustly associated with lower MD in the right globus pallidus, whereas higher persistence was associated with lower MD in the left globus pallidus. These personality variables were also associated with VCDT. The globus pallidus receives the dopaminergic input from the substantia nigra and plays a key role in motivation which is critically linked to dopamine. These results suggested the MD in the globus pallidus, underlie the association between VCDT and multiple personalities in TCI including novelty seeking.

Original languageEnglish
Pages (from-to)1808-1827
Number of pages20
JournalHuman Brain Mapping
Volume36
Issue number5
DOIs
Publication statusPublished - 2015 May 1

Keywords

  • Creativity
  • Divergent thinking
  • Dopamine
  • Harm avoidance
  • Mean diffusivity
  • Novelty seeking

ASJC Scopus subject areas

  • Anatomy
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Clinical Neurology

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