Some properties of the evoked potential and the ganglionic transmission in fresh-water mussel (Anodonta cygnea L., Pelecypoda)

Varanka, István (1972) Some properties of the evoked potential and the ganglionic transmission in fresh-water mussel (Anodonta cygnea L., Pelecypoda). A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 39. pp. 49-63. ISSN 0365-3005

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Abstract

Author investigated on the isolated preparation of fresh-water mussel, Anodonta cygnea the electrophysiological properties of the evoked potential of the cerebrovisceral connective as well as the features of two pathways passing through the visceral ganglion, i.e. CVc-nppm and CVc-naddp, by means of a stimulating and recording system comprising 5 electrodes. It has been established: 1. The non-linearity of the amplitude decrement observed on the evoked potential of CVc is caused by the exponential decrease of the passive polarizing component depending on the distance of recording. 2. The amplitude decrement is also caused by the separation of components originating in the heterogeneous fibre composition, apart from the diminution of the passive component. 3. The separation is also responsible for the increase of duration of the evoked potential observed during its propogation. 4. The main form of transmission in the CVc-nappm and CVc-naddp pathtways of VG is of synaptic nature, however, there exist directly passing fibres, too.

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