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XVI.—Electron Microscopic Studies of Spinal Ganglion Cells*

Published online by Cambridge University Press:  11 June 2012

J. Hossack
Affiliation:
Departments of Chemistry and Anatomy, Glasgow University.
G. M. Wyburn
Affiliation:
Departments of Chemistry and Anatomy, Glasgow University.
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Synopsis

Thin sections of the spinal ganglion of the rat were cut and examined with the electron microscope. Two main types of nerve cell are described. Type A with equal electron density of nucleus and cytoplasm. The cytoplasm contains large aggregates of Nissl's substance discretely scattered throughout the cell, mitochondria and osmophilic granules. Type B with a “light” nucleus and a “dark” cytoplasm. The cytoplasm is closely packed and homogeneous so that it is difficult to separate out the various cytoplasmic elements.

There is a well-marked nuclear membrane about 500 Å thick and characteristic strawberry nucleolus.

The capsular cells are closely applied to the nerve cell with no intervening boundaries. A system of cytoplasmic filaments—the “endoplasmic reticulum”—is present in the intercellular regions.

There are nerve fibres with lamellated myelin sheath, axolemma, Schwann cells and Schwann membrane.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1954

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Footnotes

*

This paper was assisted in publication by a grant from the Carnegie Trust for the Universities of Scotland.

References

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