Prenatal head position from 12–38 weeks. I. Developmental aspects

Ververs, Ingrid A.P.; Vries, J.I.P. de; Geijn, H.P. van; Hopkins, Brian

doi:10.1016/0378-3782(94)90157-0

Cited by 84 publications

(60 citation statements)

References 12 publications

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“…Moreover, the findings do not support the role of fetal head (Ververs et al 1994) or body position (Previc 1991) as a major factor in the development of this behavioural asymmetry. In fact, the motor behaviour asymmetries are observed in the first trimester, well before the first appearance of a preferential head position at 38 weeks of gestation (Ververs et al 1994).…”

Section: Discussioncontrasting

confidence: 47%

“…In fact, the motor behaviour asymmetries are observed in the first trimester, well before the first appearance of a preferential head position at 38 weeks of gestation (Ververs et al 1994). Further, this asymmetrical behaviour is observed consistently over a period of gestation when the position of the fetus changes constantly (de Vries et al 1982) and at a time in gestation when fetal position is relatively unaffected by space constriction in the amniotic cavity.…”

Section: Discussionmentioning

confidence: 78%

“…Fetuses at 38 weeks' gestation exhibit a preference for having their head turned to the right (Ververs et al 1994). Fetuses when observed at 15 to 21, 28 to 34, and 36 to 40 weeks' gestation were found to exhibit a significant preference for sucking their right thumb (Hepper et al 1991).…”

mentioning

confidence: 99%

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Development of lateralized behaviour in the human fetus from 12 to 27 weeks’gestation

McCartney

Hepper

1999

Develop Med Child Neuro

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Handedness is the most prominent manifestation of behavioural lateralization in the human population. However, little is known about its ontogeny. This study examined the prenatal development of behavioural lateralization by observing, longitudinally, the occurrence of left-and right-arm movements in 17 human fetuses at 3-week intervals from 12 to 27 weeks gestational age. Fetuses exhibited significantly more right-arm movements than leftarm movements at every gestational age. Throughout all periods of observation, 83.3% of fetuses showed more rightarm than left-arm movements. The number of arm movements observed peaked at 15 to 18 weeks' gestation and declined rapidly in mid-gestation. The occurrence of laterality in early gestation indicates that asymmetric behaviour is probably under muscular or spinal, rather than cortical, control and points to a 'genetic' origin for such behaviour. The presence of lateralized motor behaviour in early gestation suggests it may have a potential causative role for subsequent lateralized behaviour and asymmetric brain development.Lateralized behaviour is a prominent feature of human experience. One of the most obvious manifestations of lateralized behaviour is the bias toward right-handedness found in the human population.

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Section: Discussioncontrasting

confidence: 47%

Section: Discussionmentioning

confidence: 78%

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Development of lateralized behaviour in the human fetus from 12 to 27 weeks’gestation

McCartney

Hepper

1999

Develop Med Child Neuro

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“…From 15 weeks of gestation, the foetus exhibits a preference for sucking its right thumb (Hepper et al 1991) and the sucking behaviour at foetal state is related to hand preference at a later age (10-12 years; Hepper et al 2005). From 38 weeks of gestation, the foetus shows a preference for having its head turned to the right relative to its body ( Ververs et al 1994). Hormonal factors associated with the intrauterine environment are a proposed source of development of left-handedness (Geschwind & Galaburda 1985a-c).…”

Section: Developmental Factorsmentioning

confidence: 99%

Why are some people left-handed? An evolutionary perspective

Llaurens

Raymond

Faurie

2008

Phil. Trans. R. Soc. B

158

134

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Since prehistoric times, left-handed individuals have been ubiquitous in human populations, exhibiting geographical frequency variations. Evolutionary explanations have been proposed for the persistence of the handedness polymorphism. Left-handedness could be favoured by negative frequency-dependent selection. Data have suggested that left-handedness, as the rare hand preference, could represent an important strategic advantage in fighting interactions. However, the fact that left-handedness occurs at a low frequency indicates that some evolutionary costs could be associated with left-handedness. Overall, the evolutionary dynamics of this polymorphism are not fully understood. Here, we review the abundant literature available regarding the possible mechanisms and consequences of left-handedness. We point out that hand preference is heritable, and report how hand preference is influenced by genetic, hormonal, developmental and cultural factors. We review the available information on potential fitness costs and benefits acting as selective forces on the proportion of left-handers. Thus, evolutionary perspectives on the persistence of this polymorphism in humans are gathered for the first time, highlighting the necessity for an assessment of fitness differences between right-and left-handers.

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“…cervical assimétrico, fazendo com que a face fique mais tempo voltada para o lado direito do corpo (TURKEWITZ; BIRCH; MOREAU, 1966;TURKEWITZ et al, 1969;VERVERS et al, 1994;VIVIANI;KARP, 1978), induzindo assim maior contato visual com o braço direito. A observação do braço em movimento mobiliza recursos atencionais (CONTE et al, 2007), e a orientação da face para o lado direito poderia induzir o uso mais frequente do braço desse mesmo lado.…”

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Visibilidade dos braços afeta a preferência manual em bebês

Pogetti

Souza

Tudella

et al. 2013

Motriz: rev. educ. fis.

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Um aspecto de interesse sobre a formação da preferência manual humana em idades precoces é a extensão em que ela é afetada por informações aferentes. O objetivo deste estudo foi investigar o efeito da oclusão visual do braço preferido sobre a preferência manual e desempenho motor em bebês. Participaram cinco bebês com cinco meses de idade, que realizaram alcances com visão plena ou oclusão visual do braço preferido. O desempenho motor foi avaliado por meio de medidas cinemáticas. Os resultados indicaram que a oclusão visual induziu redução da frequência de alcances unimanuais com o braço ocluído durante e imediatamente após a oclusão visual. Oclusão visual não alterou o desempenho motor. Estes resultados indicam que a formação da preferência manual durante o desenvolvimento motor é afetada pela disponibilidade de informação visual dos braços, embora os bebês pareçam ter pouca capacidade de usar a visão para controle motor.

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Prenatal head position from 12–38 weeks. I. Developmental aspects

Cited by 84 publications

References 12 publications

Development of lateralized behaviour in the human fetus from 12 to 27 weeks’gestation

Development of lateralized behaviour in the human fetus from 12 to 27 weeks’gestation

Why are some people left-handed? An evolutionary perspective

Visibilidade dos braços afeta a preferência manual em bebês

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