The ratio of nerve fibers to nerve cells in the geniculate ganglion

1946 ◽  
Vol 85 (1) ◽  
pp. 141-148 ◽  
Author(s):  
James O. Foley ◽  
H. R. Pepper ◽  
W. H. Kessler
Keyword(s):  
Nerve Fibers ◽  
Nerve Cells ◽  
Geniculate Ganglion

Endings of the vagus nerve fibers in the mammalian heart

1927 ◽  
Vol 23 (6-7) ◽  
pp. 622-623
Author(s):  
B. I. Lavrent'ev
Keyword(s):  
Methylene Blue ◽  
Vagus Nerve ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
Vagus Nerves ◽  
Mammalian Heart ◽  
Cardiac Ganglia ◽  
Important Study ◽  
Spiral Fibers

In 1893, Prof. V.V. Nikolaev, having cut vagus nerves of a frog, saw under a microscope degeneration of so-called spiral fibers and pericellular apparatuses on nerve cells of intracardiac nodes. Later these observations were thoroughly verified by Prof. D.V. Polumordvinov and fully confirmed by him. I had a chance to look through amazing by technique preparations of the late Prof. Polumordvinov, obtained by methylene blue method, on which decay of pericellular apparatuses in cardiac ganglia of a frog was absolutely clearly visible. D. V-ch, who died untimely in 1919, unfortunately, did not have time to publish in detail his important study; the manuscript and drawings of his work also remained undiscovered.

scholarly journals Е. Holmgren. Note d. Spinal ganglion cells. (With. 11 images.). Anat. Vol. 16, № 7, p. 161-171. 1899. Idem. Further communications about d. Structure of the nerve cells. (With. 13 images.). Ibidem. Vol. 16. N 15/162 р. 388-397. 1899. F. Studnicka. About the occurrence of v. Canals u. Alveoli in the body d. Ganglion cells and in the axis cylinder of some nerve fibers, vol. 16. N 15/162 р. d. Vertebrates. Ibid. 397-401. 1899. Alb. Adamkiewicz. To the blood vessel system of the ganglion cell. Ibid. Vol. 17. N 2/3 p. 44. 1900. Е. Holmgren. Still other communications about the construction d. Nerve cells from various animals. (With. 17 image). Ibid. Vol. 17, N 6/7 p. 113 - 129. 1900. Idem. A few words on the occasion of the last communication published by Prof. Adamkiewicz. Ibidem, Vol. 17, N 15. 1900. A. Bethe. Some remarks on the “intracellular tubules” d spinal ganglion cells, etc. — Ibid. Vol. 17. N 16/17 p. 304-309 (with 3 images). 1900

2020 ◽  
Vol VIII (2) ◽  
pp. 171-178
Author(s):  
A. Geberg
Keyword(s):  
Blood Vessel ◽  
Ganglion Cell ◽  
Ganglion Cells ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
Spinal Ganglion ◽  
The Body ◽  
Axis Cylinder ◽  
Spinal Ganglion Cells

The above articles, although they are b. including the nature of the preliminary reports, they do not doubtlessly prove with what lively interest in the last time various researchers have turned to the development of one question, with the resolution of which a lot should be clarified regarding the finer structure, as well as the biology of the nervous.

Nerve cells in the intracranial part of the trigeminal nerve of man and dog

1971 ◽  
Vol 34 (5) ◽  
pp. 643-646 ◽  
Author(s):  
Kamal Mousa Mira ◽  
Ibrahiem Abou Elnaga ◽  
Hassanein El-Sherif
Keyword(s):  
Trigeminal Nerve ◽  
Proximal Part ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
Content Type ◽  
Specific Location ◽  
Nerve Bundles ◽  
Motor Root ◽  
Sensory Root ◽  
Fine Print

✓ Nerve cells histologically similar to the ganglionic cells of the trigeminal nerve were observed in the proximal part of the sensory root and in the motor root of the human trigeminal nerve. They were also seen in the sensory root of the trigeminal nerve of the dog. Counting of the nerve fibers showed doubling of the number of nerve fibers in the three divisions compared with the fibers in the sensory root adjacent to the trigeminal ganglion. There was also an increase in the number of fibers within the sensory root as it courses centrally, while a decrease was seen in the number of fibers in the proximal part of the motor root. Intermediate nerve bundles were seen leaving the motor root near the pons and joining the sensory root centrally. The fibers of the sensory root corresponding to each peripheral division maintained their specific location in the sensory root during the whole course centrally.

scholarly journals About multinucleated sympathetic nerve cells

1904 ◽  
Vol XII (4) ◽  
pp. 127-145
Author(s):  
I. V. Georgievskiy
Keyword(s):  
Nervous System ◽  
Sympathetic Nerve ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
Historical Society

In 1834, at a meeting of the Strasbourg Natural-Historical Society, Lauth made a report on the results of his research on the organization of the nervous system, in which, it seems, the first mention of the presence between the nerve fibers n. sympathici of round accumulations of granular substance, similar to that found in ganglia intervertebralia.

scholarly journals IN VITRO AGGREGATION OF MIXED EMBRYONIC KIDNEY AND NERVE CELLS

1971 ◽  
Vol 50 (2) ◽  
pp. 457-468 ◽  
Author(s):  
Judith Medoff ◽  
Jerome Gross
Keyword(s):  
Lactic Dehydrogenase ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
Nerve Tissue ◽  
Mixed Cell ◽  
Mixed Aggregates ◽  
Cell Stability ◽  
High Level ◽  
High Degree

The possible role of nerve on growth of embryonic parenchymal organs such as kidney was explored by measuring macromolecular synthesis (DNA, RNA, and protein and three enzymes) in aggregates of mixed suspensions of cells from dissociated chick embryo kidney and nerve tissue. One and one-half to threefold increments in net synthesis of the three different types of macromolecules were observed in the mixed aggregates of kidney and nerve cells as compared with those of single organs or mixtures of kidney with nonneural cells. The addition of nerve-growth factor (NGF) did not significantly affect the results. Increased incorporation of label was paralleled by increases in chemically measured DNA and protein, suggesting an increase in growth in the mixed kidney-nerve aggregates compared with those of single tissues. Measurements of survival rate did not indicate increased cell stability in the mixed aggregates. The activities of three enzymes, acid phosphatase, alkaline phosphatase, and lactic dehydrogenase, were also enhanced two to four times in cultures of kidney plus nerve cells. Morphologic studies indicated a high degree of reorganization of tubular structures within the reaggregates of kidney cells alone or in those mixed with nerve. In addition, radioautographs of thymidine-3H-labeled cells in the aggregates showed a high level of DNA synthesis in the reformed tubular cells. Electron micrographs revealed the presence of large numbers of nerve fibers containing microtubules in the mixed cell aggregates. The data suggest a significant role for nerve in the growth processes of embryonic parenchymal organs.

Intraocular Ganglioglioma in a Dog

1969 ◽  
Vol 6 (6) ◽  
pp. 525-533 ◽  
Author(s):  
L. Z. Saunders ◽  
L. W. Geib ◽  
C. N. Barron
Keyword(s):  
Bone Marrow ◽  
Glial Cells ◽  
Clinical Signs ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
First Report ◽  
Human Brains ◽  
Human Eyes ◽  
Ophthalmic Disease

An intraocular neoplasm is reported from a 5-1/2-month-old dog, which had had clinical signs of ophthalmic disease for about 3 months prior to exenteration. The vitreous chamber was filled with a subretinal neoplastic mass, which consisted histologically of a mixture of glial cells, nerve cells, nerve fibers, and cells resembling ependyma with some cartilage, bone, and bone marrow. The tumor was diagnosed as a ganglioglioma, a neoplasm which occurs occasionally in human brains and very rarely in human eyes. This is the first report of such a tumor in an animal other than man and the 5th report of it in an intraocular location. As in the human cases, the neoplasm was apparently present at birth or developed shortly thereafter.

scholarly journals Immunocytochemical Detection of Neuronal Nitric Oxide Synthase (nNOS)-IR in Embryonic Rat Stomach Between Days 13 and 21 of Gestation

2002 ◽  
Vol 50 (5) ◽  
pp. 671-679 ◽  
Author(s):  
Zübeyde Bayram ◽  
Mevlüt Asar ◽  
Sevil çayli ◽  
Ramazan Demir
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Neuronal Nitric Oxide Synthase ◽  
Mesenchymal Cell ◽  
Wistar Rat ◽  
Nerve Fibers ◽  
Nerve Cells ◽  
Rat Stomach ◽  
Glandular Structures ◽  
Oxide Synthase

In this study, the localization and appearance of neuronal nitric oxide synthase-immunoreactive (nNOS-IR) nerve cells and their relationships with the developing gastric layers were studied by immunocytochemistry techniques and light microscopy in embryonic rat stomach. The stomachs of Wistar rat embryos aged 13–21 days were used. The first nerve cells containing nNOS-IR were seen on embryonic Day 14. The occurrence of mesenchymal cell condensation near nNOS-IR neuroblasts on embryonic Day 15 may reflect an active nerve element-specific mesenchymal cell induction causing the morphogenesis of muscle cells. Similarly, the appearance of glandular structures after nNOS-IR neuroblasts, on embryonic Day 18, suggests that the epithelial differentiation may depend on inputs coming from nNOS-IR neuroblasts, as well as other factors. Observation of nNOS-IR nerve fibers on embryonic Day 21 demonstrates that at this stage they contribute to nonadrenergic noncholinergic relaxation. In conclusion, depending on this study's results, it can be said that cells and tissues might be affected by NO secreted by nNOS-IR nerve cells during the development and differentiation of embryonic rat stomach.

scholarly journals Retrograde tracing of spinal cord connections to the cervix with pregnancy in mice

Reproduction ◽  
2010 ◽  
Vol 139 (3) ◽  
pp. 645-653 ◽  
Author(s):  
Michael A Kirby ◽  
Mary M Groves ◽  
Steven M Yellon
Keyword(s):  
Spinal Cord ◽  
Pseudorabies Virus ◽  
Nerve Fibers ◽  
Retrograde Tracing ◽  
Nerve Cells ◽  
Substantia Gelatinosa ◽  
Neural Connections ◽  
Pregnant Mice ◽  
Motor Areas

In contrast to the uterus, the cervix is well innervated during pregnancy and the density of nerve fibers increases before birth. To assess neural connections between the cervix and the spinal cord, the cervix of pregnant mice was injected with the trans-synaptic retrograde neural tract tracer pseudorabies virus (PRV). After 5 days, the virus was present in nerve cells and fibers in specific areas of the sensory, autonomic, and motor subdivisions of the thoracolumbar spinal cord. In nonpregnant controls, the virus was predominantly distributed in laminae I–III in the dorsal gray sensory areas with the heaviest label in the substantia gelatinosa compared with the autonomic or motor areas. Labeled cells and processes were sparse in other regions, except for a prominent cluster in the intermediolateral column (lamina VII). Photomicrographs of spinal cord sections were digitized, and the total area with the virus was estimated. Compared with nonpregnant controls, the area with PRV was significantly decreased in all the spinal cord subdivisions in pregnant mice except in the intermediolateral column. However, areas with the virus were equivalent in mice injected with PRV at 4 days or 1 day before birth. These findings suggest that the predominant innervation of the murine cervix is from the sensory regions of the thoracolumbar spinal cord, and that these connections diminish with pregnancy. The results raise the possibility that the remaining connections from sensory and autonomic subdivisions, particularly the intermediolateral column, of the thoracolumbar spinal cord may be important for increased density of nerve fibers in the cervix as pregnancy nears term.

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