Functional Regeneration and Remyelination in the Zebrafish Optic Nerve

Abstract Goldfish and carp are shown to be capable of functional reconstitution of the visual system, although their neural retina except of the marginal growth zone at the ora serrata was completely destroyed by injection of the Na-K-ATPase inhibitor ouabain. This was demonstrated by the observation of the recovery of the optokinetic nystagmus after dam age of the retina. Recovery of vision coincides well with the morphological reconstitution of the visual system. The regenerated axons within the optic nerve are still unmyelinated at the moment of visual recovery, whereas some fibers within the stratum opticum pars profunda of the corresponding optic tectum are already myelinated. The recovery of vision after regeneration of the retina was com pared with the recovery of vision after crush of the optic nerve. The range of time needed for visual recovery was smaller and better reproducible after crush than after dam age o f the retina.

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Decision letter for "The Effect of Optic Nerve Section on Form Deprivation Myopia in the Guinea Pig"

10.1002/cne.24961/v1/decision1 ◽

2020 ◽

Keyword(s):

Optic Nerve ◽

Guinea Pig ◽

Nerve Section

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Oligodendrocytes in Developing Hameter Cerebral Cortex

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100090610 ◽

1976 ◽

Vol 34 ◽

pp. 126-127

Author(s):

MB. Tank Buschmann

Keyword(s):

Cerebral Cortex ◽

Optic Nerve ◽

Frontal Cortex ◽

Osmium Tetroxide ◽

Sodium Cacodylate Buffer ◽

Sodium Cacodylate ◽

Tissue Samples ◽

Cacodylate Buffer ◽

Layer V ◽

Adult Hamster

Development of oligodendrocytes in rat corpus callosum was described as a sequential change in cytoplasmic density which progressed from light to medium to dark (1). In rat optic nerve, changes in cytoplasmic density were not observed, but significant changes in morphology occurred just prior to and during myelination (2). In our study, the ultrastructural development of oligodendrocytes was studied in newborn, 5-, 10-, 15-, 20-day and adult frontal cortex of the golden hamster (Mesocricetus auratus).Young and adult hamster brains were perfused with paraformaldehyde-glutaraldehyde in sodium cacodylate buffer at pH 7.3 according to the method of Peters (3). Tissue samples of layer V of the frontal cortex were post-fixed in 2% osmium tetroxide, dehydrated in acetone and embedded in Epon-Araldite resin.

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