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Definition
By Mayo Clinic staffLewy body dementia, the second most common type of progressive dementia after Alzheimer's disease, causes a progressive decline in mental abilities. It may also cause visual hallucinations, which may take the form of seeing shapes, colors, people or animals that aren't there or, more complexly, having conversations with deceased loved ones.
Another indicator of Lewy body dementia may be significant fluctuations in alertness and attention, which may include daytime drowsiness or periods of staring into space. And, like Parkinson's disease, Lewy body dementia can result in rigid muscles, slowed movement and tremors.
In Lewy body dementia, abnormal round structures — called Lewy bodies — develop in regions of your brain involved in thinking and movement.
- NINDS Dementia with Lewy bodies information page. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/dementiawithlewybodies/dementiawithlewybodies.htm. Accessed July 6, 2010.
- Hake AM, et al. Clinical features and diagnosis of dementia with Lewy bodies. http://www.uptodate.com/home/index.html. Accessed July 6, 2010.
- Hake AM, et al. Epidemiology, pathology and pathogenesis of dementia with Lewy bodies. http://www.uptodate.com/home/index.html. Accessed July 6, 2010.
- What is LBD? Lewy Body Dementia Association. http://www.lbda.org. Accessed July 6, 2010.
- Hake AM, et al. Prognosis and treatment of dementia with Lewy bodies. http://www.uptodate.com/home/index.html. Accessed July 6, 2010.
- Dementia: Hope through research. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/dementias/detail_dementia.htm?css=print. Accessed July 6, 2010.
- Caring for Alzheimer's. Alzheimer's Association. http://www.alz.org/living_with_alzheimers_caring_for_alzheimers.asp. Accessed July 6, 2010.
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