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By Cedric S. Raine (auth.), Pierre Morell (eds.)

ISBN-10: 1461575141

ISBN-13: 9781461575146

ISBN-10: 1461575168

ISBN-13: 9781461575160

The department of the mature mammalian mind and spinal wire into areas of "white" subject and "gray" topic is observable upon the main cursory inspection. Microscopic exam exhibits that the "white" topic areas are characterised via a multilamellar sheath (myelin) which sur­ rounds the axons. A morphologically comparable myelin imparts the white colour to tracts of the peripheral frightened method, even if, as is empha­ sized through the booklet, there are very major morphological and chemical ameliorations among vital and peripheral myelin. The speedy postnatal accumulation of myelin is temporally linked to expanding practical capability and most likely exhibits a few vital function relating to neuronal task. the power of myelinated axons to behavior electric impulses even more swiftly and with a lot decrease use of power, relative to unmyelinated axons, is now regularly approved. As is clear from the above pill description, a substantial physique of data touching on myelin is out there. despite the fact that, as in different components of study the unknown expands prior to us extra swiftly than we can upload to our middle of data. it is a corollary of the axiom stable test increases extra questions than it solutions. one of the parts currendy lower than research in lots of laboratories are the next: interplay of myelin-forming cells with neurons, meeting and metabo­ lism of myelin, molecular structure of myelin, and the main points of the sensible function of myelin.

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Tm. Fig. 25. Later CNS node from the spinal cord of a 4-day-old kitten. The lateral loops are smaller and more flattened. Desmosomes (large arrow) are seen between the loops, transverse bands are barely visible between the loops and the axolemma, and subaxolemmal densification (small arrow) is present. x59,000. tm. 30 Cedric S. Raine Fig. 26. Lateral loops from a mature CNS node underlaid by transverse bands (arrows). The axon is below. x75,000. 2 JLm. , 1973; Schnapp and Mugnaini, 1975) (Figs.

2 (S. ), p. 9, Academic Press, New York. , 1964, The relationship between the gliasatellite cell and the axon in the central myelinated fibers, in: Proceedings of the Third Europea~ Regular Conference on Electron Microscopy, Vol. B (M. ), p. 301, Czechoslovak Academy of Science, Prague. , 1965, Ultrastructure of the nodes of Ranvier and their surrounding structures in the central nervous system, Z. Zellforsch, Mikroskop. Anat. 65:719. , 1967, On the fine structure of nerve myelin by means of glutaraldehyde fixation,].

46:71. 44 Cedric S. , 1971a, Ultrastructural and light-microscopic studies of the nodal region in large myelinated fibres of the adult feline spinal cord white matter, Acta Physiol. Scand. 364:43. , 1971b, Ultrastructural and light-microscopic studies of the developing feline spinal cord white matter. II. Cell death and myelin sheath disintegration in the early postnatal period, Acta Physiol. Scand. 364:109. , 1972, Evidence for a correlation between myelin period and number of myelin lamellae in fibres of the feline spinal cord white matter,].

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Myelin by Cedric S. Raine (auth.), Pierre Morell (eds.)


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