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Humoral Transmission of Nervous Impulses



    IN 1921 it was proved for the first time that the modifications of the heart's function, caused by stimulation of its nerves, are due to substances liberated by the stimulation, called transmitters: acetylcholine and an adrenaline-like body respectively, which in their turn bring about the effects of stimulation. This ‘humoral transmission of nervous impulses’ occurs, not only in the heart, but also with stimulation of all the other vegetative nerves. Whether it also happens within the somatic nervous system is not yet settled.

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