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 that he was just following the order in which a normal child develops. For example: the healthy infant, as soon as he can make other than reflex movements, begins to move his limbs by lifting the arm from the shoulder. The brain first takes control of the limb as a whole, then it takes control of parts;

Diagram kindly lent by Lee and Raper, trustees

it takes finer and fuller control—all in a definite order. This order can be followed by a glance at any map of the brain where the areas of the motor brain, governing movements of various parts of the body, are shown.

Séguin followed this order, and he gave his reasons. But though brain physiology was not so far advanced