Parkinson's disease

As Parkinson’s disease progresses, it often results in a progressive dementia similar to dementia with Lewy bodies or Alzheimer’s.

 Symptoms

Problems with movement are common symptoms of the disease. If dementia develops, symptoms are often similar to dementia with Lewy bodies.

Brain changes

Alpha-synuclein clumps are likely to begin in an area deep in the brain called the substantia nigra. These clumps are thought to cause degeneration of the nerve cells that produce dopamine

Other Types of Dementia