He provided experimental evidence for the all-or-none law of nerves.

The all-or-none law extends to the organ stimulated by the nerve.

It is important to contrast this with the all-or-none law propagation of the action potential down the axon of the neuron.

The result of these two variable effects is that, without violating the all-or-none law, a muscle can be made to contract in extremely fine gradations of intensity.

This is the "all-or-none law" and may be simply stated: a nerve fiber either propagates an impulse of maximum strength or propagates no impulse at all.

The all-or-none law is the principle that the strength by which a nerve or muscle fiber responds to a stimulus is independent of the strength of the stimulus.