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.
Dementia care: What happens in the brain? Dementia is an umbrella term for a range of different disorders that affect the brain- get the low down on the various types here. In scene 1 of Louise's story, Louise is diagnosed with dementia, the umbrella term for various diseases affecting the brain and the way it functions.