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Titolo:
DEVELOPMENTAL ORIGINS OF VARIATION IN HUMAN HAND PREFERENCE
Autore:
YEO RA; GANGESTAD SW;
Indirizzi:
UNIV NEW MEXICO,DEPT PSYCHOL ALBUQUERQUE NM 87131
Titolo Testata:
Genetica
fascicolo: 1-3, volume: 89, anno: 1993,
pagine: 281 - 296
SICI:
0016-6707(1993)89:1-3<281:DOOVIH>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
MINOR PHYSICAL ANOMALIES; FLUCTUATING DERMATOGLYPHIC ASYMMETRY; PRENATAL EXPOSURE; CEREBRAL-DOMINANCE; AUTISTIC-CHILDREN; CORPUS-CALLOSUM; LEFT-HANDEDNESS; ENZYME LOCI; LIFE-SPAN; SCHIZOPHRENIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
106
Recensione:
Indirizzi per estratti:
Citazione:
R.A. Yeo e S.W. Gangestad, "DEVELOPMENTAL ORIGINS OF VARIATION IN HUMAN HAND PREFERENCE", Genetica, 89(1-3), 1993, pp. 281-296

Abstract

Though right-handedness is a prominant characteristic within all human societies, a substantial and stable proportion of individuals are left-handed. Any comprehensive approach to the origin of variation in handedness must account for substantial evidence that left-handedness isassociated with reduced fitness, neurodevelopmental disorders, and reduced neuroanatomical asymmmetry. In this paper we investigate the hypothesis that developmental instability in early fetal development underlies variation in handedness. In two studies we note an increased incidence of minor physical anomalies (MPAs) and fluctuating asymmetries in both left-handers and extreme right-handers. Moreover, extreme right-handlers were more apt to have left-handed parents than moderate right-handers. These data suggest that deviation from moderate right-handedness reflect imprecise expression of a near-universal design due to developmental instability. Preliminary attempts to elucidate the mechanisms underlying developmental instability suggest that both polygenichomozygosity and particular HLA alleles may be important factors. These observations are discussed with respect to current genetic theoriesof handedness and human evolution.

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Documento generato il 13/07/20 alle ore 09:52:59