title: Handedness in twins according to zygosity and chorion type: a preliminary report.
abstract: In the course of the East Flanders Prospective Twin Survey (EFPTS), handedness was assessed as part of a genealogical study (Meulemans et al., 1995) in 1616 twins (808 twin pairs) aged 6 to 28. Our findings are that, in this large population-based study with known placentation and zygosity, the often observed higher frequency of left-handedness in twins is confirmed, that it appears to be independent of zygosity and chorion type, and that the belief that discordant handedness in monozygotic twins represents mirror-imaging is mythical.
authors.affiliation: Centre for Human Genetics, Katholieke Universiteit Leuven, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Derom
authors.forename: E
authors.initials: E
authors.lastname: Thiery
authors.forename: R
authors.initials: R
authors.lastname: Vlietinck
authors.forename: R
authors.initials: R
authors.lastname: Loos
authors.forename: R
authors.initials: R
authors.lastname: Derom
mesh_terms: D000293:Adolescent; D000328:Adult; D001530:Belgium; D002648:Child; D005260:Female; D007839:Functional Laterality / Q000235:genetics*; D006801:Humans; D008297:Male; D010929:Placentation / Q000235:genetics*; D011247:Pregnancy; D011446:Prospective Studies; D014429:Twins, Dizygotic / Q000235:genetics*; D014430:Twins, Monozygotic / Q000235:genetics*