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.
The most common type of brain tumor is a glioma. Gliomas begin from glial cells, which are the supportive tissue of the brain. There are several types of gliomas, categorized by where they are found and the type of cells that originated the tumor.ymptoms of brain tumors in the cerebellum (back of brain) may include: 1  Increased intracranial pressure (ICP). 2  Vomiting (usually occurs in the morning without nausea). 3  Headache. 4  Uncoordinated muscle movements. 5  Problems walking (ataxia).