Definition of Medullary sheath
1. Noun. A layer of myelin encasing (and insulating) the axons of medullated nerve fibers.
Generic synonyms: Case, Sheath
Terms within: Axolemma, Nodes Of Ranvier, Ranvier's Nodes, Oligodendria, Oligodendroglia
Group relationships: Medullated Nerve Fiber, Myelinated Nerve Fiber
Terms within: Medulla, Myelin, Myeline
Medical Definition of Medullary sheath
Lexicographical Neighbors of Medullary Sheath
Literary usage of Medullary sheath
Below you will find example usage of this term as found in modern and/or classical literature:
1. Encyclopaedia Britannica: A Standard Work of Reference in Art, Literature (1907)
"Each fibre consists of three parts : (1) an external sheath or primitive sheath ; (i) within this the medullary sheath or white ..."
2. An American Text-book of Physiology by William Henry Howell (1900)
"in the growth of the cell is the formation of the medullary sheath about ... Not all axones have a medullary sheath, uor is any axone completely medullated. ..."
3. Philosophical Magazine (1805)
"D, Herbaceous prolongation of the medullary sheath passing through the wood and ... E, medullary sheath of a branch• G, Pith. F, medullary sheath of a twig. ..."
4. Medical Record by George Frederick Shrady, Thomas Lathrop Stedman (1897)
"It is only where the nerve has lost its medullary sheath that the nucleus becomes visible. ... The medullary sheath or white substance of Schwann is a soft, ..."
5. Quain's Elements of Anatomy by Jones Quain, Allen Thomson, George Dancer Thane (1882)
"Other breaks of continuity are seen in the medullary sheath (fig. ... In C' ,'B sequence of their presence the medullary sheath almost constantly appears as ..."
6. Journal of Nervous and Mental Disease by Philadelphia Neurological Society, American Neurological Association, Chicago Neurological Society, New York Neurological Association (1884)
"The medullary sheath of almost all nerve-fibres in these preparations was deranged, its fibrillar layer being displaced to form larger or smaller ..."