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The Endowment for Human Development
The Endowment for Human Development
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Right- and Left-Handedness


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: Do końca 8. tygodnia u 75% zarodków obserwowana jest dominacja prawej ręki. U pozostałych w równym stopniu występuje dominacja lewej ręki lub oburęczność. Są to najwcześniejsze oznaki prawo- lub leworęczności.

All ages referenced to fertilization, not last menstrual period.
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The Highly Complex Brain
Right- and Left-Handedness
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