Several myelinated nerve fibers lose their myelin sheaths and entwine the collagenous fibers of a tendon. A capsule around the organ is continuous with the perineurium. Contraction of the muscle compresses the naked nerve endings thereby exciting them. 3. Sensory endings. A few simple examples ...
The vapor from an aqueous solution is known to have a much greater penetrating power for non-neural tissues than the solution itself but nothing has been recorded about its advantages for fixing and staining myelin sheaths of nerve fibers. Difficulties in securing adequate staining of the myelin ...
Nerve fibers are formed by packets of axons, but rarely one single axon goes from the receptor to the brain. How is the message that the action potential carries from the receptor transmitted from one neuron to another? The main function of myelin is to do what in the body? ...
degeneration, denoting a close association with them, perhaps in the sense of assuming myelin as a formationofSchwann cellsadjacent to the axons the problem would already have been solved. The degeneration phenomenon would then be explained assuming the nerve fibers and Schwann cells joined i...
Myelin sheaths cover nerve fibers. It is these neural signals that dictate all of the body’s movements and functions, from the conscious — raising one’s hand to wave hello — to the unconscious — digesting one’s dinner. To ensure that the body runs smoothly, each neural signal must ...
Multiple sclerosis (MS) affects millions of people worldwide, and there is currently no cure for this disease of the central nervous system. Damage to the nerve fibers, also called axons, is responsible for the severity of MS in patients and for the course of the disease. And myelin, which...
The myelin sheath is a lipid-rich casing found on the axons of neurons. In the central nervous system, it is produced by oligodendrocytes, while in the peripheral nervous system it is produced by Schwann cells. Between myelin sheaths are nodes of Ranvier, which are smal...
replacing the degenerated portion of the organ of Corti; (6) Regenerated nerve fibers with thin myelin sheaths or a simple investment of Schwann cell cytoplasm appeared in areas of total loss of the organ of Corti; and (7) The myelin sheaths on the regenerated nerve fibers gradually became ...
Myelinsheathofthecentralnervoussystem.Thesameoligodendrocyte formsmyelinsheathsforseveral(3–50)nervefibers.Inthecentralnervous system,processesofothercellssometimescoverthenodesofRanvier,or thereisconsiderableextracellularspace(ES)atthatpoint.Theaxolemma
1488 (A) and (B) show a nerve autograft with homogenous spread nerve fibers with regular myelin sheaths. (C) and (D) show an acellular muscle graft, seeded with Schwann cells. The myelin sheaths appear to be more irregular. A collagen graft shows only particularly associated nerve fibres ...