Post-Tetanic Potentiation

Abstract
This paper reviewed examples of increased responsiveness following repetitive stimulation reported in the neurophysiological and psychophysical literature. It takes up systems showing post-tetanic potentiation (neuromuscular system, sympathetic ganglia, spinal cord subcortical nuclei, visual system, auditory system, olfactory system); factors influencing PTP (circulation, temperature, relative position of electrodes, characteristics of tetanus, subnormality); drug effects (K, acetylcholine, eserine, curare); and explanations of PTP (in terms of increased transmitter substance, repetitive discharge and summation, and locus of the effect). The implication is strong that all facilitation may depend upon a similar mechanism and be at the root of learning at all levels of nervous integration. The conflicting views of Lloyd and Eccles concerning the mechanism are presented.

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