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.
People who have early onset Alzheimer's may be in any stage of dementia â early stage, middle stage or late stage. The disease affects each person differently and symptoms will vary. If you are experiencing memory problems: 1  Have a comprehensive medical evaluation with a doctor who specializes in Alzheimer's disease.
Brain Disorders. As you can imagine, all of us desire a brain that is healthy and functions properly. Unfortunately, there are some who suffer from neurological disorders of the brain. A few of these disorders include: Alzheimer's disease, epilepsy, sleep disorders, and Parkinson's disease.