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Neurology. 2002 Dec 24;59(12):1979-81.

Hallucinations and sleep-wake cycle in PD: a 24-hour continuous polysomnographic study.

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Unit of Sleep Medicine, IRCCS C. Mondino Institute of Neurology, Pavia, Italy.


Twenty-four-hour ambulatory polysomnography was performed in 20 patients with PD who were having visual hallucinations (12 men and 8 women, mean age 70 +/- 6 years). Visual hallucinations were clearly related to daytime NREM sleep or nocturnal REM sleep in 33% of the instances. The data reinforce the hypothesis that neural mechanisms implicated in generating sleep and, in particular, in dream imagery play a role in the occurrence of visual hallucinations in PD.

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