Digit ratio and length asymmetry in calves’ limbs
نویسندگان
چکیده
منابع مشابه
Prediction of hemispheric asymmetry as measured by handedness from digit length and 2D:4D digit ratio.
Hemispheric asymmetry is widely theorised as having a basis in prenatal androgen levels. However, these theories ignore a second round of asymmetrical changes in the brain, which occur at the same time as post-puberty surges in androgens. Hemispheric asymmetry in adults might therefore be explained in terms of the joint effects of prenatal and post-pubertal androgen levels. Evidence is emerging...
متن کاملThe Ratio of Second to Fourth Digit Length (2D:4D) in Children with Autistic Disorder
Introduction Emerging hypotheses suggest a causal role for prenatal androgen exposure in some cases of Autism spectrum disorders (ASD). The ratios of the lengths of the bones of the 2nd to the 4th digits (2D:4D) are purported to be markers for prenatal androgen exposure and to be established early in gestation. Ratio of second and fourth digits (2D:4D) is usually used as a proxy for prenatal t...
متن کاملDoes digit ratio (2D:4D) predict penile length?
Now advertized in at least one locale as the ‘sexy ratio’ with the caption, ‘Your hands give away your hotness’ (http://io9.com/ #!5794008; accessed 3 May 2011), an online summary of a recent study linking facial attractiveness to the ratio of the index and ring fingers indicates that digit ratio (2D:4D) research has reached mainstream culture. Digit ratio, most commonly the ratio of the index ...
متن کاملThe 2nd:4th digit ratio and asymmetry of hand performance in Jamaican children.
Testosterone, particularly prenatal testosterone, has been implicated in the aetiology of many extragenital sexually dimorphic traits. It is difficult to test directly for the effect of prenatal testosterone in humans. However, Manning, Scutt, Wilson, and Lewis-Jones (1998b) have recently shown that the ratio of the length of the 2nd and 4th digits (2D:4D) in right hands negatively predicts tes...
متن کاملBody height , body mass index , waist - hip ratio , fluctuating asymmetry and second to fourth digit ratio in subjects with latent
2 SUMMARY Between 20 % and 60 % of the population of most countries are infected with the protozoan Toxoplasma gondii. Subjects with clinically asymptomatic lifelong latent toxoplasmosis differ from those who are Toxoplasma free in several behavioral parameters. Case-control studies cannot decide whether these differences already existed before infection or whether they were induced by the pres...
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ژورنال
عنوان ژورنال: Zoology
سال: 2021
ISSN: 0944-2006
DOI: 10.1016/j.zool.2020.125859