Summary
Both with reduction and with the rise of pressure in the frog's vessels the authors observed in the nervous elements of the inspiratory center an increase of the rheobase, prolongation of chronaxie, and reduction of accomodation constant, accompanied by respiratory arrest. This process was absent in the nervous elements of expiratory and motor areas. A conclusion was drawn that constant afferent impulsation from the baroceptors of aortic zone, creating back-ground excitation in the inspiratory area, plays the leading role in the organization of automatism in the frog's respiratory center. The mechanism may become decisive in organizing the respiratory center automatism in the higher animals in special conditions, for instance in phenomena of body revival.
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Dontsova, Z.S., Biryukov, V.E. & Bondarenko, N.A. On the causes of automatic excitation of the frog respiratory center. Bull Exp Biol Med 55, 619–621 (1964). https://doi.org/10.1007/BF00786799
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DOI: https://doi.org/10.1007/BF00786799