From FuturePundit: "Myelin is insulation around nerves and is essential for the conduction of impulses along nerves. The ability to grow pure populations of cells that make myelin brings us closer to effective treatments for multiple sclerosis and other diseases characterized by the loss of myelin. ... Scientists [found] a way to rapidly produce pure populations of cells that grow into the protective myelin coating on nerves in mice. Their process opens a door to research and potential treatments for multiple sclerosis, cerebral palsy and other demyelinating diseases afflicting millions of people worldwide. ... These results matter to us all. Why? We all suffer from a demyelinating disease called aging. One of the reason older folks have harder times with memory recall, coordination, and other mental tasks is that myelin deteriorates with age. The ability to restore myelin is an essential rejuvenation therapy. Therefore the pursuit of effective treatments for MS and other demyelinating diseases will yield useful therapies for brain rejuvenation. Just about any therapy aimed at repairing damage caused by a specific disease will also be useful for rejuvenation. Aging causes very diffuse damage to all the tissues in the body. When enough of that damage accumulates in a single organ or structural element disease emanating from a specific location emerges. But the localized disease is really just part of a bigger pattern of damage accumulation. So therapies aimed at repair of specific locations in the body will have a great deal of overlap with therapies aimed at full body rejuvenation."