Genetic effects on infant handedness under spatial constraint conditions

Kunitake Suzuki, Juko Ando, Naho Satou

研究成果: Article査読

8 被引用数 (Scopus)

抄録

Previous studies have reported a genetic influence on the individual differences in adult handedness; however, relatively little is known about genetic influences on the development of infant hand selection. In the current study, we examined whether genetic influences on handedness are expressed in various spatial locations in infants aged 18 months using the twin method. Infants were asked to respond to targets positioned in left, middle, and right locations using grasping movements. Results showed that similarities in hand selection within monozygotic twin pairs was more than two times higher than that of the dizygotic twin pairs in the middle location. In the left location, similarities in hand selection within monozygotic and dizygotic twin pairs were low. In addition, low individual differences in hand selection in the right location were also observed. These results suggest a non-additive genetic influence on handedness, and that spatial constraint is a crucial factor for the expression of genetic effects on handedness in infants.

本文言語English
ページ(範囲)605-615
ページ数11
ジャーナルDevelopmental Psychobiology
51
8
DOI
出版ステータスPublished - 2009 12 1

ASJC Scopus subject areas

  • 発達心理学および教育心理学
  • 発達神経科学
  • 発生生物学
  • 行動神経科学

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