Investigations on the interganglionic and peripheral neuronal pathways in the central nervous system of Lymnaea stagnalis L.

Gubicza, András and S.-Rózsa, Katalin (1970) Investigations on the interganglionic and peripheral neuronal pathways in the central nervous system of Lymnaea stagnalis L. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 37. pp. 17-31. ISSN 0365-3005

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Abstract

By cutting the different commissures, connectives and nerve branches in the central nervous system of the Lymnaea stagnalis L. it was concluded that 1) Neurons containing a granular substance staining intensively with PMaG appearing 1-2 days following nerve transections were scattered in the various ganglia. Grouping of pyroninophilic cells was noted only after transection of the left and right pallial nerves. 2) After cutting different nerve branches, there was a disparity in the number and distribution of pyroninophilic cells between the right and left ganglia. 3) Granular pyroninophilia was found to appear in small, medium-sized and large cells alike. Most pyroninophilic cells were found among the small cells. 4) The number of pyroninophilic cells was higher after transection of the connectives and commissures of the central nervous system than after cutting peripheral nerves. 5) After transection of different nerve branches the right parietal ganglion differed from the left showing a similar pattern to that of the abdominal ganglion. 6) Following transection of the cerebro-cerebral commissure neurons with enlarged nucleoli containing RNA particles were found among the cells of the mediodorsal body. These cells stained intensively with pyronine. 7) The cerebral ganglia can be regarded as the integrative centre of the ascending and descending nerve paths in Lymnaea etaynalis L.

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