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Updated: May 22, 2025
Try to reverse any one of these simple actions, and you will see at once that they are immediately implied in the very fact of our original right-handedness. And herein, I think, we find the true answer to Charles Reade's mistaken notion of the advantages of ambidexterity. You couldn't make both hands do everything alike without a considerable loss of time, effort, efficiency, and convenience.
A full discussion would lead us to the conclusion that dextrality is due to a difference in development in the two hemispheres of the brain, that these differences are hereditary, and that they show themselves toward the end of the first year. It is a singular circumstance that right-handedness and speech are controlled by the same hemisphere of the brain and from contiguous areas.
We find spontaneous arm and hand movements, reflex movements, reaching-out movements, grasping movements, imitative movements, manipulating movements, and voluntary efforts all these, in order, reflecting the development of the mind. To illustrate this method, I may cite certain results reached by myself on the questions of colour and distance perception, and right-handedness in the child.
His right-handedness, in short, is part cause and part effect of his universal supremacy in animated nature. He is what he is, to a great extent, 'by his own right hand; and his own right hand, we may shrewdly suspect, would never have differed at all from his left were it not for the manifold arts and trades and activities he practises.
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