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.
Introduction. Parkinson's disease (PD) is a slowly progressive neurological disorder that affects movement, muscle control, and balance. Parkinsonâs disease is part of a group of conditions called motor system disorders, which are associated with the loss of dopamine-producing brain cells.evodopa (L-dopa). Levodopa, or L-dopa, has been used for years and is the gold standard for treating Parkinson's disease. L-dopa increases brain levels of dopamine. It is probably the most effective drug for controlling symptoms and is used in nearly all phases of the disease.