1. Myelin prevents ions from entering or leaving the axon along myelinated segments. 2. Some studies suggest an overall decrease in the number of myelinated fibers. 3. Action potentials cannot propagate through the membrane in myelinated segments of the axon. 4. In the CNS, axons are myelinated by oligodendrocytes, thus lack neurolemma. 5. A fibers are myelinated allowing for faster signal conduction. 6. The C fibers are not myelinated and therefore slower. 7. This myelinated division can then enter the sympathetic chain. 8. Recently, skin biopsy has been used to investigate mechanoreceptors and their myelinated afferents. 9. In the body, Type II fibers are the second most highly myelinated fibers. 10. Histopathology of peripheral nerve shows reduced number of myelinated and non-myelinated axons.
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