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The organization of the neryous system of ariolimax columbianus

✍ Scribed by R. S. Turner; D. B. Nevius

Publisher: John Wiley and Sons
Year: 1951
Tongue: English
Weight: 876 KB
Volume: 94
Category: Article
ISSN: 0021-9967
DOI: 10.1002/cne.900940205

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✦ Synopsis

Data on the functional organization of the nervous system of gastropods are fragmentary and scattered. The anatomy of the synapses between neurons in these forms is uncertain, and histological techniques have been inadequate to demonstrate continuity of neuron chains. Moreover, such techniques as appear to give some indication of links in neuron chains are, by their nature, incapable of demonstrating other important relationships of neurons. The Golgi technique, for example, is unsatisfactory for determining the number and location of presynaptic neurons which converge on one or more postsynaptic neurons.

Modern investigative tools such as high-gain amplifiers and the cathode ray oscilloscope, supplemented by drugs which are known to block synaptic transmission, permit a more meaningful interpretation of the basic histology of the gastropod nervous system. In this paper are presented the results of such a study of the functional anatomy of the nervous system of Ariolirnax columbianus.

Methods

The specimens of ArioEimax columbianus used in these investigations were collected at all seasons of the year along Schilling Fellow in Anatomy, 1949-50. 'Aided by grants from the Medical Research Fund and from the Kinney Fund, Stanford School of Medicine. For the drawing used in figure 1 we are indebted to Miss Margaret Wilkin of Berkeley, California.

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