Identifier: 39002086343333.med.yale.edu
Title: A treatise on mental diseases
Year: 1900 (1900s)
Authors: Berkley, Henry Johns,1860-
Subjects: Insanity Mental Disorders
Publisher: New York, D. Appleton & Company
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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issues, they enlarge,become filled with fine granular debris, and if the morbid processis intense and the strain upon them too severe, they die with thenerve cells; and unless total destruction of the part results, theirplace is filled by the proliferating long-rayed cells. These latterseem to survive and multiply under most adverse conditions, andcannot therefore be so delicately organized. Parenthetically, theyare somewhat analogous to the epidermal cells which proliferate inepithelial growths of the skin, even when the nutrition of the parthas been reduced to a very low ebb. From their situation it is probable that the horse-tail cell, as wellas others of similar type along the free surface of the brain, arederived from the external portion of the ventricular astrocyte whileit is in process of development. The insertion into the margin of theperidyme of their irregular protoplasmic bodies and the brush exten-sion downward strongly suggest this origin. According to Binswan- PLATE II
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PLATE II The Different Types of Neuroglia Cellsseen in Adult Tissues Fig. 1. Ependymal cell from the pituitary body approximating the embry-onic type. Fig. 2. Ependymal cells of fir-tree form from the margin of the thirdventricle adjacent to the infundibulum. Fig. 3. Long-rayed neuroglia cell withbeaded arms from the gray matter adjacent to the third ventricle. Fig. 4. Long-rayed neuroglia cell from the fourth layer of the cortex, a transition form betweenthe ordinary long-rayed and mossy form. Fig. 5. LoDg-rayed glia cell from thesubcortical white matter. Fig. 6. Another form from the same region. Fig. 7. Asimilar type from the lower border of the gray matter of the cortex. Fig. 8. Tran-sition form between the short- and long-rayed types. From the gray matter of thecortex. Fig. 9. Long-rayed cell from the optic nerve tracts. Fig. 10. Mossy gliacell from the second cellular layer of the cortex. Fig. 11. A similar cell from thefourth layer of the cortex. Fig. 12. Neuroglia cells of hor

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