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Related to right-handedness: dominant hand, Left handedness


see handednesshandedness,
habitual or more skillful use of one hand as opposed to the other. Approximately 90% of humans are thought to be right-handed. It was traditionally argued that there is a slight tendency toward asymmetrical physiological development favoring the right side of the
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The dominant form of the gene confers right-handedness (and also, interestingly enough, a clockwise hair spiral).
Scientists have linked prevalent right-handedness in human populations to a left brain hemisphere that controls right-sided body movements and functions crucial to language.
Dye's right-handedness fits better on our club and Tuck's left-handedness fits better on their club.
Now, a new investigation by Frayer and an international team led by Virginie Volpato of the Senckenberg Institute in Frankfurt, Germany, has confirmed Regourdou's right-handedness by looking more closely at the robustness of the arms and shoulders, and comparing it with scratches on his teeth.
By at least 120,000 years ago, right-handedness frequently occurred among Neandertals, Uomini asserts.
She says that the findings of her team's study attain significance because determining when right-handedness first evolved may shed light on traits linked to lateralised brains, such as language and technology.
There are a number of common characteristics common among dyslexics: unusual misspellings; the tendency to reverse letters and words, such as b for d; mirror writing, in which whole sentences are written backward; and sloppy handwriting, thought to be caused by an uncertain preference for left- or right-handedness.
They also suggest that the crows' preference could be equivalent to human right-handedness.
The psychologists combined the results of 20 previous studies, both published and unpublished, comparing rates of right-handedness in a total of 23,410 homosexual and heterosexual men and women.
The right-handedness of the DNA double helix is expected to induce some form of twisting in the strands of the liquid crystal that is analogous to the way a twisted-up phone cord tends to coil around itself.
If right-handedness indeed occurred in 9 out of 10 Neandertals, that figure coincides with the frequency of right-handedness in modern human groups, he notes.
Even before human-like creatures came along, hand and posture preferences among early prosimians, monkeys and apes paved the way for a human brain that accentuates right-handedness and contains structures within the left side of the brain exploited for speech and language comprehension by natural selection, theorize psychologist Peter F.