The role of interneuronal connections in the regulation of heart beats in the snail Helix pomatia L.

S.-Rózsa, Katalin and Salánki, János (1974) The role of interneuronal connections in the regulation of heart beats in the snail Helix pomatia L. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 41. pp. 45-55. ISSN 0365-3005

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Abstract

The role of interneuronal connections in the regulation of heart beats was studied at neuronal level in the brain-heart preparation of Helix. Three types of neurones were described. 1. Neurons sending direct branches to the heart whose axons can be detected both by physiological and morphological methods in the intestinal nerve; 2. interneurons joining to the motoneurons of the heart, the excitation of which cause asynchronous increase in the activity of the heart branch of the intestinal nerve; 3. neurons producing delayed asynchronous reaction, the stimulation of which is manifested in increased excitation of the heart nerve activity in 20—30 sec, or causing excitation only at repeated stimulation. According to the types of neurons different neuronal connections are suggested, building up the. complex system of the extracardial regulation of heart beats.

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