By Dr. Gopal D. Das, Dr. Georg W. Kreutzberg (auth.)
The presence of nerve cells within the white topic of the spinal wire and within the spinal and cranial nerves has attracted the eye of a few researchers long ago. due to their position in such unforeseen areas, those neurons supplied a wealthy box of hypothesis concerning their nature and serve as. This was once partic ularly real in regards to the nerve cells mendacity within the spinal white topic. From phylogenetic issues, neurons within the spinal white topic are current extra abundantly in amphibians, reptiles and brids than in mammals. A. short survey of literature on decrease vertebrates shows that GASKELL (1885, 1889) was once the 1st to explain the displaced neurons within the white topic of the spinal wire of alligators and diverse species of birds. In his attention they have been displaced ganglion cells. In 1902 von KOELLIKER gave an exhaustive account of such neurons within the white subject of the spinal wire of reptiles and birds. In those animals he saw clusters of such neurons working in longitudinal columns and hence used to be in a position to crew them into nuclei often called "Hofmann's nuclei". additional, he prompt that those nuclei come up from the mass of the ventral horn and they can give upward push t. o preganglionic fibers, motor fibers or ventral commissural fibers. In t. he resulting years research of those nuclei was once prolonged by way of STREE TER, KRAUSE, TERNI, HUBER and others (quoted from ARIENS KAPPERS et. aI. , 1960, Vol. I, p. 206-210).
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Additional info for Evaluation of Interstitial Nerve Cells in the Central Nervous System: A Correlative Study Using Acetylcholinesterase and Golgi Techniques
DAS and G. W. KREUTZBERG: may be the reticular neurons and belong to the reticular formation. RAMONMOLlNER and NAUTA (1966) while defining the isodendritic core of the brain stem emphasize the first two attributes of the reticular neurons. Various other authors too (RAMON Y CAJAL, 1911; Roussy and MOSINGER, 1936; MANNEN, 1960, 1966; VALVERDE, 1961; LEONTOVICH and ZHOKOVA, 1963) have used them, though implicitly, for describing the reticular formation. Morphologically the isodendritic characteristic of reticular neurons is so unique, that they can be distinguished in other neural structures, like secondary sensory nuclei, specific thalamic nuclei etc.
Golgi method. Guinea pig 30 days old. X 95 Fig. 24. a) A group of large interstitial neurons in the ventral region of the descending tract of the trigeminus nerve at the same level as in Fig. 23. Nerve cells indicated by arrows are shown in the drawing b. Golgi method. Guinea pig 30 days old. X 75 (Figs. 23a, b and 24a, b) . Their dendrites are thick , long and tapering. These dendrites may reach distant parts of the tract but never penetrate into the sensory nucleus of this tract. In few instances the long dendrites of these neurons could be seen sweeping very close to the lateral borders of the sensory nucleus but never extend into it.
Finally, correspondance between the cytological observations made with histochemistry and Golgi preparations, as attempted in this study, can be fraught with many errors. At this stage of our knowledge there is no established method of studying histochemical properties as well as the total morphological aspects of nerve cells simultaneously. However, focusing our attention on the compact and well delineated fiber bundles proved satisfactory in reduction of such errors. In Golgi preparations every serial section was studied to delineate the fiber bundles in their cross section before the interstitial neurons were taken for evaluation.
Evaluation of Interstitial Nerve Cells in the Central Nervous System: A Correlative Study Using Acetylcholinesterase and Golgi Techniques by Dr. Gopal D. Das, Dr. Georg W. Kreutzberg (auth.)