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| Titel: |
Prediction of hemispheric asymmetry as measured by handedness from digit length and 2D:4D digit ratio |
| Auteur: |
Jackson, Chris |
| Verschenen in: |
Laterality |
| Paginering: | Jaargang 13 (2008) nr. 1 pagina's 34-50 |
| Jaar: |
2008-01 |
| Inhoud: |
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 that the ratio between the length of the second and fourth digits (2D:4D) is related to prenatal androgen exposure, and that digit length is related to post-puberty levels of androgen exposure. In this study, hemispheric asymmetry is measured as handedness, prenatal androgen levels as 2D:4D, and post-puberty androgen levels as digit length. Right-handedness is associated with consistent prenatal and post puberty androgen release whereas left-handedness is associated with mixed levels of androgen release. Age, race, and sex effects were explored but were not significant. |
| Uitgever: |
Psychology Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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