Abstract
“Either the nerves themselves may communicate impressions different in quality to the sensorium, which in every instance remains the same; or else the vibrations of the nervous principle may in every nerve be the same,….”, etc.1“The results therefore fail to support the view (of Bishop and Heinbecker), that there are fiber types distinguishable by time to maximum, conduction rate, irritability and refractory period…. Since it is possible to recognize differences in the physiological responses of individual axons, it is no longer incumbent upon physiologists to adhere to the doctrine of specific nerve energies.”2The latter quotation seems to present a third alternative to those recognized by Johannes Muller in the former, a formulation of his doctrine of specific nerve energies. Muller emphasized the specificity of the whole sensory pathway, being unable to decide whether the differences in sensory pathways were assignable to qualitative differences in the responses of the nerve fibers concerned, or to dif...
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