منابع مشابه
Dermatoglyphic Asymmetry: Relation to Sex, Handedness and Cognitive Pattern
The number of ridges on the fingertips has a major genetic contribution, and is fixed by the fourth month of fetal life. Most people have a higher count on the right-hand side (R > ), approx. 20% have a higher left-hand side (L > ) count. The incidence of higher left count is greater in women and in homosexual men. Direction of dermatoglyphic asymmetry was not found to be related to handedness ...
متن کاملManual asymmetry and handedness.
Volumetric measurements show that right-handed individuals have larger right hands than left hands. In contrast, the hands of left-handers are much more nearly symmetrical. Based on what is known about trophic interactions between neurons and targets, these findings predict a corresponding asymmetry of the relevant parts of the sensorimotor system in right-handers. The lack of an opposite-hand ...
متن کاملPrediction 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 کاملParacingulate Sulcus Asymmetry in the Human Brain: Effects of Sex, Handedness, and Race
The anterior cingulate cortex (ACC), which is thought to play a key role in cognitive and affective regulation, has been widely reported to have a high degree of morphological inter-individual variability and asymmetry. An obvious difference is in the morphology of the paracingulate sulcus (PCS). Three types of PCS have been identified: prominent, present, and absent. In this study, we examined...
متن کاملSex differences in handedness, asymmetry of the planum temporale and functional language lateralization.
Many studies have investigated sex differences in language lateralization. Despite the large number of investigations, controversy about the presence of sex differences in lateralization remains. This study aims to provide a complete overview of sex differences in several reflections of language lateralization: handedness, asymmetry of the Planum Temporale (PT) and functional lateralization of ...
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ژورنال
عنوان ژورنال: Science
سال: 1981
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.212.4501.1417