The symptoms of Lewy body dementia include hallucinations, movement disorders, poor regulation of bodily function, cognitive problems, fluctuating attention, sleep difficulties and depression, reports the Mayo Clinic. Many of the symptoms of Lewy body dementia may be similar to those of Parkinson's disease and Alzheimer's disease.
Lewy body dementia symptoms that are shared with Parkinson's disease include a shuffling walk, tremors, stiff muscles and slow movements, according to the Mayo Clinic. Symptoms relating to poor regulation of bodily function may impair blood pressure, pulse and the digestive process. Individuals may experience bowel problems, excess sweating, dizziness and falls as a result of the symptoms.
Individuals may also experience memory loss, confusion, poor attention span and disorganized speech as a result of cognitive decline, states Mayo Clinic. Sleep problems are a characteristic of the disease as well, resulting in frequent long naps, drowsiness and unresponsiveness with long periods of staring into space. Rapid eye movement sleep behavior disorder may cause individuals with Lewy body dementia to physically act out their dreams during sleep. Individuals with Lewy body disease also experience frequent depression.
The cause of Lewy body dementia is not known, according to the Mayo Clinic. The disease is progressive and usually results in death an average of eight years after onset.