Summary
An experiment was designed to examine the course of degeneration, phagocytosis, and regeneration in the central nervous system following surgical deafferentation. The anterior cerebellar vermis was ablated in young male rats. The animals were sacrificed by perfusion at postoperative times ranging from 24 hrs to 6 months. The lateral vestibular nuclei, to which the anterior cerebellar vermis projects, were processed for electron microscopy. Degenerating synaptic terminals, of the dark variety, were seen from 24 hrs to five days postoperatively. Phagocytosis of degenerating terminals occurred during this time. Degenerating axons persisted through 6 months survival, and phagocytosis of these degenerating axons was observed. Astrocyte scar formation began at 1 month postoperatively. The relative number of axosomatic synaptic terminals containing flattened vesicles (“F” terminals; presumed inhibitory in function) increased in operated animals. The highest F scores were found from 24 hrs to two weeks postoperatively, and then the F scores declined through six months. The significance of these sprouting activities is discussed in relation to the abortive sprouting phenomenon described by Ramón y Cajal.
Similar content being viewed by others
References
Andersen, P., Eccles, J. C., Voorhoeve, P. E.: Post-synaptic inhibition of cerebellar Purkinje cells. J. Neurophysiol.27, 1138–1153 (1964)
Barron, K. D., Means, E. D., Feng, T., Harris, H.: Ultrastructure of retrograde degeneration in thalamus of rat. 2. Changes in vascular elements and transvascular migration of leukocytes. Exp. molec. pathol.20, 344–362 (1974)
Bernstein, J. J., Gelderd, J. B., Bernstein, Mary E.: Alteration of neuronal synaptic complement during regeneration and axonal sprouting of rat spinal cord. Exp. Neurol.44, 470–482 (1974)
Bignami, A., Ralston, H. J.: The cellular reaction to Wallerian degeneration in the central nervous system of the cat. Brain Res.13, 444–461 (1969)
Birks, R., Katz, B., Miledi, R.: Physiological and structural changes at the amphibian myoneural junction, in the course of nerve degeneration. J. Physiol. (Lond.)150, 145–168 (1960)
Blakemore, W. F.: Microglial reactions following thermal necrosis of the rat cortex. Acta neuropath. (Berl.)21, 11–22 (1972)
Bodian, D.: An electron microscopic characterization of classes of synaptic vesicles by means of controlled aldehyde fixation. J. Cell Biol.44, 115–124 (1970)
Bodian, D.: Origin of specific synaptic types in the motoneuron neuropil of the monkey. J. comp. Neurol.159, 225–244 (1975)
Brodal, A., Pompeiano, O., Walberg, F.: The vestibular nuclei and their connections. Henderson Trust Series No. 20 (1962)
Brown, J. O., McCouch, G. P.: Abortive regeneration of the transected spinal cord. J. comp. Neurol.87, 131 (1947)
Clemente, C. D., Windle, W. F.: Regeneration of severed nerve fibers in the spinal cord of the adult cat. J. comp. Neurol.101, 691–731 (1954)
Cramon, D. von: Licht- und elektronenmikroskopische Untersuchung der gliös-mesenchymalen Narbenstruktur in der experimentell traumatisierten Großhirnrinde des Goldhamsters nach Anwendung des bakterienpolysacchariden Piromen. Acta neuropath. (Berl.)31, 219–227 (1975)
De Robertis, E.: Submicroscopic changes of the synapse after nerve section in the acoustic ganglion of the guinea pig: An electron microscopic study. J. biophys. biochem. Cytol.2, 503–512 (1957)
Eager, R. P., Eager, P. R.: Glia responses to degenerating cerebellar cortico-nuclear pathways in the cat. Science153, 553–554 (1966)
Eccles, J. C.: The physiology of synapses. Berlin-Göttingen-Heidelberg: Springer 1964
Gentschev, T., Sotelo, C.: Degenerative patterns in the ventral cochlear nucleus of the rat after primary deafferentation. An ultrastructural study. Brain Res.62, 37–60 (1973)
Goodman, D. C., Horel, J. A.: Sprouting of optic tract projections in the brain stem of the rat. J. comp. Neurol.127, 71–88 (1966)
Gray, E. G., Hamlyn, L. H.: Electron microscopy of experimental degeneration in the avian optic tectum. J. Anat. (Lond.)96,309–316 (1962)
Hager, H., Blinzinger, K.: Über eigenartige Astrozytenfortsätze und intrazytoplasmatische Vesikelreihen (Elektronenmikroskopische Untersuchungen an Gliosen des Säugetiergehirns). Z. Zellforsch.65, 57–73 (1965)
Johnson, J. E., Jr., Miquel, J.: Fine structural changes in the lateral vestibular nucleus of aging rats. Mech. Age. Develop.3, 203–224 (1974)
Johnson, J. E., Jr.: The occurrence of dark neurons in the normal and deafferentated lateral vestibular nucleus in the rat. Observations by light and electron microscopy. Acta neuropath. (Berl.)31, 117–127 (1975)
Klaue, R.: Regenerationsversuche bei Rückenmarksschädigungen des Menschen, ausgehend von den hinteren Wurzeln. Wien. 2 Schr. Nervenb.2, 488–497 (1948)
Konigsmark, B. W., Sidman, R. L.: Origin of brain macrophages in the mouse. J. Neuropath. exp. Neurol.22, 643–676 (1963)
Lhermitte, J., Hécaen, de Ajuriaguerra: Section complete de la moelle dorsale, verifree chirurgicalment et anatomiquement. Rev. neurol.77, 308–310 (1945)
Liu, Chan-Nao, Chambers, W. W.: Intraspinal sprouting of dorsal root axons. Arch. Neurol. Psychiatr (Chic.)79, 46–61 (1958)
Lorente de No, R.: La regeneration de las medula espinal en los larvas de bactricio. Trabajos. Inst. Cajal Invest. Biol. Madrid19, 147–183 (1921)
Lund, R. D., Lund, J. S.: Modification of synaptic pattern in the superior colliculus of the rat during development and following deafferentation. Vision Res., Suppl. No. 3, 281–198 (1971)
Matus, A. I., Dennison, M. E.: Autoradiographic localisation of tritiated glycine at “flat vesicle” synapses in the spinal cord. Brain. Res.32, 195–197 (1971)
Maxwell, D. S., Kruger, L.: Small blood vessels and the origin of phagocytes in the rat cerebral cortex following heavy particle irradiation. Exp. Neurol.12, 33–54 (1965)
Migliavacca, A.: Richerche sperimentali sulla rigenerazione del midollo spinale nei feti e nei neonati. Arch. Ist biochim. ital.2, 201–236 (1930)
Mori, Schiro, Leblond, C. P.: Identification of microglia in light and electron microscopy. J. comp. Neurol.135, 57–79 (1969)
Murray, Marion, Goldberger, M. E.: Restitution of function and collateral sprouting in the cat spinal cord: The partially hemisected animal. J. comp. Neurol.158, 19–36 (1974)
Otsuka, M., Obata, K., Miyata, Y., Tanaka, Yuriko.: Measurements of γ aminobutyric acid in isolated nerve cells of cat central nervous system. J. Neurochem.18, 287–295 (1971)
Peters, G.: Multiple sclerosis. In: Pathology of the Nervous System (ed. J. Minckler). London: McGraw-Hill 1968
Piatt, J., Piatt, M.: Transection of the spinal cord in the frog. Anat. Rec.131, 81–95 (1958)
Raisman, G.: Neuronal plasticity in the septal nuclei of the adult rat. Brain Res.14, 25–48 (1969)
Ralston, H. J., Chow, K. L.: Synaptic reorganization in the degenerating lateral geniculate nucleus of the rabbit. J. comp. Neurol.147, 321–350 (1973)
Ramón y Cajal, S.: Degeneration and regeneration of the nervous system. London-New York: Oxford University Press 1928
Scott, D., Jr., Clemente, C. D.: Regeneration of spinal cord fibers in the cat. J. comp. Neurol.102, 633–669 (1955)
Spatz, H., Morphologische Grundlagen der Restitiution im Zentralnervensystem. Deutsch. Z. Nervenheilk.115, 197–231 (1930)
Sugar, O., Gerard, R. W.: Spinal cord regeneration. J. Neurophysiol.3, 1–19 (1940)
Uchizono, K.: Characteristics of excitatory and inhibitory synapses in the central nervous system of the cat. Nature (Lond.)207, 642–643 (1965)
Uchizono, K.: Synaptic organization of the Purkinje cells in the cerebellum of the cat. Exp. Brain Res.4, 97–113 (1967)
Valdivia, O.: Methods of fixation and the morphology of synaptic vesicles. J. comp. Neurol.142, 257–274 (1971)
Vaughan, Deborah W., Peters, A.: Neuroglial cells in the cerebral cortex of rats from young adulthood to old age: an electron microscopic study. J. Neurocytol.3, 405–429 (1974)
Vaughn, J. E., Peters, A.: A third neuroglial cell type: An electron microscopic study. J. comp. Neurol.133, 269–288 (1968)
Vaughn, J. E., Hinds, Patricia, L., Skoff, R. P.: Electron microscopic studies of Wallerian degeneration in rat optic nerves. I. The multipotential glia. J. comp. Neurol.140, 175–206 (1970)
Vaughn, J. E., Pease, D. C.: Electron microscopic studies of Wallerian degeneration in rat optic nerves. II. Astrocytes, oligodendrocytes and adventitial cells. J. comp. Neurol.140, 207–226 (1970)
Walberg, F., Mugnaini, E.: Distinction of degenerating fibers and boutons of cerebellar and peripheral origin in the Deiters' nucleus of the same animal. Brain Res.14, 67–75 (1969)
Author information
Authors and Affiliations
Additional information
This research was supported by NASA Task No. 970-21-11-11 at Ames Research Center and NIH Training Grant No. 5T01 GM00793-11 at Tulane University.
Rights and permissions
About this article
Cite this article
Johnson, J.E. A fine structural study of degenerative-regenerative pathology in the surgically deafferentated lateral vestibular nucleus of the rat. Acta Neuropathol 33, 227–243 (1975). https://doi.org/10.1007/BF00688396
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00688396