Handedness: An alternative hypothesis

Ashton, G. C.

doi:10.1007/bf01065761

Cited by 88 publications

(44 citation statements)

References 21 publications

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“…Although previous studies have supported this theory, the actual incidence of LH differs from the theoretical figures, and genetic and environmental influences on handedness differ with the type of LH relatives (Mckeever, 2000;Mckeever et al, 2000; Ashton, 1982;Spiegler & Yeni-Komshian, 1983). The incidence of current LH was significantly lower in females than in males.…”

Section: Genetic and Environmental (Forced Conversion) Influences On mentioning

confidence: 38%

“…Thus, RH is genetically determined and LH is determined by both genetic and environmental factors. Although previous studies have supported this theory, the actual incidence of LH differs from the theoretical figures, and genetic and environmental influences on the determination of handedness differ with the type of LH relatives (Mckeever, 2000;Mckeever et al, 2000;Ashton, 1982;Spiegler & Yeni-Komshian, 1983).…”

mentioning

confidence: 59%

“…The previous studies examining the effect of LH relatives on LH offspring, based on singleton population studies (Annett, 1973;Ashton, 1982;Spiegler & Yeni-Komshian, 1983;Risch & Pringle, 1985) reported that the incidence of LH was lower in offspring with RR parents (two RH parents) than in those with LR parents (LH mother and RH father) or RL parents (RH mother and LH father), regardless of gender. McKeever (2000) indicated a significantly greater incidence of LH offspring of LL couples (two LH parents) than of RR parents.…”

Section: Influence Of Lh Relatives On Handednessmentioning

confidence: 99%

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Characteristics of Handedness in Japanese Adults: Influence of Left-handed Relatives and Forced Conversion

Sato

Demura

Sugano

et al. 2008

Int. J. Sport Health Sci.

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Section: Genetic and Environmental (Forced Conversion) Influences On mentioning

confidence: 38%

mentioning

confidence: 59%

Section: Influence Of Lh Relatives On Handednessmentioning

confidence: 99%

See 1 more Smart Citation

Characteristics of Handedness in Japanese Adults: Influence of Left-handed Relatives and Forced Conversion

Sato

Demura

Sugano

et al. 2008

Int. J. Sport Health Sci.

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“…Como tanto durante a infância, quanto durante a vida adulta -da juventude à velhice -tem sido identificado que a incidên-cia de indivíduos com preferência manual direita tende a aumentar (cf. Ashton, 1982;Hinojosa, Sheu, & Michel, 2003), supõe-se que com o avanço da idade os indiví-duos se tornem mais lateralizados (Singh et al, 2001;Teixeira, 2008). Assim, se a expectativa de distribuição populacional de aproximadamente 90% de indivíduos destros (Brackenridge, 1981;Porac et al, 1980) for confirmada, aproximadamente 80% dos bebês com preferência manual esquerda ou indefinida deverão mudar sua preferência manual para o lado direito em idades mais avançadas.…”

Section: Discussionunclassified

“…Achados de pesquisas em bebês indicam congruência entre a preferência manual do bebê e a preferência manual da mãe, enquanto que o mesmo não tem sido verificado em relação à preferência manual do pai (cf. Ashton, 1982;Harkins & Michel, 1988). Em famílias com pais discordantes em relação à preferência manual, a descendência manual esquerda provém com maior frequência da mãe do que do pai (Annett, 1978(Annett, , 1999.…”

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Preferência manual na ação de alcançar em bebês em função da localização espacial do alvo

Souza

Tudella

Teixeira

2011

Psicol. Reflex. Crit.

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ResumoPreferência manual em bebês de 5 meses de idade foi avaliada em tarefas de alcançar alvos estáticos posicionados na linha média, à direita e à esquerda com referência a coordenadas egocêntricas. A análise da frequência de uso das mãos indicou direção e magnitude de preferência manual diversificadas entre os bebês. Foi observado que os bebês realizaram predominantemente alcances ipsilaterais para alvos posicionados lateralmente. Para alcances na linha média a frequência de uso foi semelhante entre as mãos direita e esquerda. Os resultados sugerem que nessa fase do desenvolvimento a preferência manual para o alcançar é alterada pela posição dos objetos no espaço. Palavras-chave: Lateralidade; Preferência manual; Desenvolvimento motor; Bebês. AbstractManual preference of 5-month-old infants was evaluated in tasks of reaching static targets positioned on the midline, at the left and right, regarding egocentric coordinates. Frequency analysis of using the hands pointed out to diversified direction and magnitude of manual preference among infants. It was observed that they predominantly made ipsilateral reaches toward targets laterally positioned. Frequency of using the right and left hands was similar for targets located at the midline. The results suggest that in this stage of development manual preference is shifted by the spatial position of the objects. Keywords: Laterality; Manual preference; Motor development; Infants. O uso preferencial de uma mão em relação ao uso da mão oposta é uma característica comum nos seres humanos. Aproximadamente 85-90% de indivíduos adultos têm relatado possuir preferência manual direita (Brackenridge, 1981;Porac, Coren, & Duncan, 1980). Evidências indicam que a lateralização do comportamento é iniciada precocemente. Ramsay (1980), ao avaliar a preferência manual de bebês aos 5, 7, 9 e 13 meses, não encontrou preferência manual em bebês aos 5 meses. Entre 7 e 9 meses de idade a maioria dos bebês mostrou preferência manual, a qual foi confirmada aos 13 meses, sugerindo que o estabelecimento da preferência manual se inicia na segunda metade do primeiro ano de vida do bebê. Caplan e Kinsbourne (1976), no entanto, detectaram preferência manual em bebês em um período anterior ao observado por Ramsay, quando os bebês possuíam apenas 3 meses

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Long‐term influences of a preterm birth on movement organization and side specialization in children at 4–8 years of age

Johansson

Domellöf

Rönnqvist

2014

Developmental Psychobiology

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This study explored upper-limb and head kinematics during unimanual goal-directed movements in children born preterm (PT) and full-term (FT) aged 4-8 years. Further, functional lateralization was investigated through side-specific kinematics and hand preference observations. Altogether, 141 children were included, divided into three sub-groups based on gestation week at birth (GW). Children born FT (38-41 GW) and moderately PT (33-35 GW) showed faster, smoother, and shorter movement trajectories than children born very PT (V-PT < 33 GW). Only children born FT expressed evident side differences that were characterized by smoother movements with the preferred side. Regarding hand preference, the children born V-PT showed increased rates of non-right-handedness compared with the other groups. Regardless of hand preference, the children born V-PT showed less well organized movements compared with the other groups. These findings suggest that spatio-temporal movement organization and side specialization at pre-/early school-age are affected by a PT birth, and more frequently so for children born before 33 GWs, indicating long-lasting influences on neuromotor development and specialization.

show abstract

Handedness: An alternative hypothesis

Cited by 88 publications

References 21 publications

Characteristics of Handedness in Japanese Adults: Influence of Left-handed Relatives and Forced Conversion

Characteristics of Handedness in Japanese Adults: Influence of Left-handed Relatives and Forced Conversion

Preferência manual na ação de alcançar em bebês em função da localização espacial do alvo

Long‐term influences of a preterm birth on movement organization and side specialization in children at 4–8 years of age

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