Are all axons covered with myelin? No; they can be either myelinated or unmyelinated. Myelinated axons are ensheathed along their entire length. The axon caliber (diameter) in mammalian PNS ranges ...

In contrast to gray matter that is formed from neurons and their unmyelinated fibers, the white matter below them is formed predominantly by myelinated axons interconnecting neurons in different ...

Based on the findings previously collected by Bellen and other researchers, Nave and his colleagues hypothesized that myelin, ...

A gradual loss of brain tissue is a natural part of aging, but one of the longest-running brain scan studies has now revealed ...