Setting aside the notion of determining the number of individual animals on the planet for a moment, merely determining the number of species on the Earth is challenging. Science has only been able to offer estimates thus far, and totals vary greatly.
A. A. A. Multiple sclerosis, or MS, is a long-lasting disease that can affect your brain, spinal cord, and the optic nerves in your eyes. It can cause problems with vision, balance, muscle control, and other basic body functions. The effects are often different for everyone who has the disease.
Symptoms of White Matter Brain Disease. White matter brain disease results in the degeneration of white matter, which creates a large portion of the brain. The primary form of white matter brain disease is multiple sclerosis, which results in the destruction of the myelin sheath. In multiple sclerosis, there is defective formation or maintenance of the myelin because of dysfunction of the oligodendrocytes, a type of glial cell.