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Titolo:
HAND PREFERENCE AND DEVELOPMENTAL INSTABILITY
Autore:
YEO RA; GANGESTAD SW; DANIEL WF;
Indirizzi:
UNIV NEW MEXICO,DEPT PSYCHOL ALBUQUERQUE NM 87131
Titolo Testata:
Psychobiology
fascicolo: 2, volume: 21, anno: 1993,
pagine: 161 - 168
SICI:
0889-6313(1993)21:2<161:HPADI>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
MINOR PHYSICAL ANOMALIES; FLUCTUATING DERMATOGLYPHIC ASYMMETRY; GROWTH-RATE; POSSIBLE EXPLANATIONS; AUTISTIC-CHILDREN; RAINBOW-TROUT; BIRTH STRESS; ENZYME LOCI; HETEROZYGOSITY; HOMEOSTASIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
69
Recensione:
Indirizzi per estratti:
Citazione:
R.A. Yeo et al., "HAND PREFERENCE AND DEVELOPMENTAL INSTABILITY", Psychobiology, 21(2), 1993, pp. 161-168

Abstract

The origins of individual variation in hand preference are unclear, with some theories emphasizing environmental factors, and others, genetic factors. In two studies, we investigated the hypothesis that developmental instability, leading to imprecise expression of a near-universal neural design, underlies phenotypic variation in hand preference and performance. In Study 1, a composite index of developmental instability was constructed from a checklist of minor physical anomalies and the left-right asymmetry in a specific dermatoglyphic characteristic ofthe palms, the atd angle. This composite measure possessed a linear relationship with a hand preference inventory and both linear and curvilinear relationships with a measure of relative hand skill. Study 2 replicated these results and extended them to a wider variety of physical left-right asymmetries. Three major implications of these results are discussed. First, variations in early fetal development may be important for individual variations in the neural substrate of handedness, leading to both left-handedness and extreme right-handedness. Second, as developmental instability likely results from polygenic homozygosity, the present results may be incompatible with single-gene theories of handedness. Third, the theoretical underpinnings of developmental instability offer a novel way to account for the association of left-handedness with some neurodevelopmental disorders.

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Documento generato il 02/07/20 alle ore 22:38:22