Histological examination of the ganglions in the fresh water mussel with impregnation methods Anodonta cygnea L.

Gubicza, András and Zs.-Nagy, Imre (1965) Histological examination of the ganglions in the fresh water mussel with impregnation methods Anodonta cygnea L. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 32. pp. 11-15. ISSN 0365-3005

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Abstract

1. It is characteristic of the ganglions of fresh water mussels that the neurons and the fibrous stock are separating from each other. 2. No separation into layers according to the dimensions of cells forming a cortex at the edge of the ganglions can be observed. 3. Longitudinal dimension of the cells ranges from 5 to 50 µ. 4. As to their processes the neurons are unipolar. Bi- and multipolar cells seldom occur. 5. Two further types of neurons can be distinguished according to whether areas seeming void appear in the cytoplasm or they are uniformly impregnated. 6. Some large size neurons are surrounded by glia arranged in layers. 7. In the ganglions there are two types of fibres: a) thin, palely impregnated and b) thick, darkly impregnated fibres which may be of a straight shape, undulating and varicose. 8. The sraight shaped and varicose fibres show branchings. 9. In the neuropile, glia nuclei and few neurons occur. 10. Out of the ganglions of the fresh water mussels from the morphological point of view ggl. viscerale is the most diversified.

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