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.
Early LBD symptoms are often confused with similar symptoms found in other brain diseases like Alzheimerâs. Also, LBD can occur alone or along with Alzheimerâs or Parkinsonâs disease. There are two types of LBD â dementia with Lewy bodies and Parkinsonâs disease dementia. The earliest signs of these two diseases differ but reflect the same biological changes in the brain.