Definition that contains myelin
- ms a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers
- cortex the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum
- tract a bundle of myelinated nerve fibers following a path through the brain
- pathway a bundle of myelinated nerve fibers following a path through the brain
- nerve tract a bundle of myelinated nerve fibers following a path through the brain
- grey matter greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons
- autonomic ganglion any of the ganglia of the autonomic system whose unmyelinated fibers innervate the internal organs
- oligodendria tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers
- multiple sclerosis a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers
- myelinisation the development of a myelin sheath around a nerve fiber