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For example, the pathological left-handedness syndrome has been speculated to contribute to why twins having a higher prevalence for left-handedness left-handedness syndrome states that when an injury occurs during early development it affects lateralization and ultimately handedness. [6]
For example, if someone were to voluntarily make a fist with their left hand, their right hand would do the same. In most cases, the accompanying contralateral involuntary movements are much weaker than the ipsilateral voluntary ones, although the extent and magnitude of the mirrored movement vary across patients. [ 4 ]
Handedness displays a complex inheritance pattern. For example, if both parents of a child are left-handed, there is a 26% chance of that child being left-handed. [23] A large study of twins from 25,732 families by Medland et al. (2006) indicates that the heritability of handedness is roughly 24%. [24]
While these genetic variants account for only a tiny fraction - perhaps 0.1% - of left-handedness, the researchers said the study shows that this gene, called TUBB4B, may play a role in the ...
There has been a fair amount of research that associates left-handedness with the likelihood of psychotic disorders like schizophrenia. Can being left-handed really affect mental health? Skip to ...
Examples of syndromes include Diamond–Blackfan anemia, and the VACTERL association, acrocallosal syndrome, basal cell nevus syndrome, Biemond syndrome, ectrodactyly-ectodermal dysplasias-cleft lip/palate syndrome, mirror hand deformity, Mohr syndrome, oral-facial-digital syndrome, Rubinstein–Taybi syndrome, short rib polydactyly.
Cat eye syndrome; Caudal regression syndrome; Sotos syndrome Cerebral Gigantism; CHARGE syndrome; Chromosome 16 abnormalities; Chromosome 18 abnormalities; Chromosome 20 abnormalities; Chromosome 22 abnormalities; Cleft lip/palate; Cleidocranial dysostosis; Club foot; Congenital adrenal hyperplasia (CAH) Congenital central hypoventilation syndrome
An example would include handedness. Handedness can result from asymmetry in the motor cortex of one hemisphere. For right handed individuals, since the brain operates the contralateral side of the body, they could have a more induced motor cortex in the left hemisphere.