More than one way for doing the same thing is provided by the natural constitution of the nervous system. This luxury of means of compassing a given combination seems to offer the means of restitution of an act after its impairment or loss in one of its several forms.
Nobel Lectures, Physiology or Medicine 1922-1941, Nobel lecture for award received in 1932, Inhibition as a Coordinative Factor (p. 289), Elsevier Publishing Company. Amsterdam, Netherlands. 1965