Twinning is associated with an increased risk of left-handedness and inverted writing hand posture

S Coren

doi:10.1016/0378-3782(94)90096-5

Twinning is associated with an increased risk of left-handedness and inverted writing hand posture

Early Hum Dev. 1994 Dec 16;40(1):23-7. doi: 10.1016/0378-3782(94)90096-5.

Author

S Coren¹

Affiliation

¹ Psychology Department, University of British Columbia, Vancouver, Canada.

PMID: 7712958
DOI: 10.1016/0378-3782(94)90096-5

Abstract

Left-handedness and inverted handwriting postures are more frequent among birth-stressed individuals. Because twinning is also associated with increased birth risk, 298 twins were compared to 1192 age and sex matched singletons. Both left-handedness and inversion were significantly more common in twins, although other indexes of laterality were not affected.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adult
Female
Functional Laterality*
Handwriting*
Humans
Male
Middle Aged
Posture*
Twins, Dizygotic*
Twins, Monozygotic*