Parkinson's disease patients with dementia can lose their mental abilities at almost the same rate as people with Alzheimer's disease, say Norwegian researchers.Parkinson's disease belongs to a group of conditions called movement disorders. Symptoms of Parkinson's disease include tremors, rigidity, and imbalance. Symptoms vary from person to person, and not everyone is affected by all of the symptoms.Not all people with Parkinson's disease have dementia. However, dementia isn't unusual with Parkinson's disease, although it may take a decade to appear after Parkinson's begins. Parkinson's disease occurs when brain cells that produce the chemical dopamine die. As a result, dopamine levels drop, garbling the brain's movement signals to the body.Parkinson's is usually diagnosed in people aged 50 or older (though it can occur in adults as young as 30). Advanced age is also the main risk factor for dementia. Alzheimer's disease is the most common cause of dementia.The latest study on......
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