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We might have a strong hand because having a weak hand is actually useful.

To learn more about this topic, start your googling with these keywords:
Handedness: the tendency to use one hand more than the other for specific tasks

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Chédotal A and LJ Richards. 2010. Wiring the brain: the biology of neuronal guidance. Cold Spring Harb Perspect Biol. 2010 Jun; 2(6): a001917. doi: 10.1101/cshperspect.a001917

Magat M and C Brown. 2009. Laterality enhances cognition in Australian parrots. Proc. R. Soc. B 276:4155-4162

Forrester GS, WD Hopkins, K Hudry, A Lindell (eds). 2018. Cerebral Lateralization and Cognition: Evolutionary and Developmental Investigations of Behavioral Biases. Progress in Brain Research. Book series. Volume 238, Pages 2-433

Corballis MC (2014) Left Brain, Right Brain: Facts and Fantasies. PLoS Biol 12(1): e1001767. https://doi.org/10.1371/journal.pbio.1001767

Direct download: Why_Its_Good_To_Have_A_Weak_Hand.mp4
Category:general -- posted at: 3:30pm EDT