Journal of Parkinson's Disease� [2012] DOI
10.3233/JPD-2012-12087 (Merrel van Gilst, Maartje Louter, Christian
Baumann, Bastiaan Bloem, Sebastiaan Overeem)
A
new study has confirmed that sleep improves the symptoms of nearly half (47%) of
people with Parkinson's Disease. Typically their motor functioning seems to be
better in the morning just after they have woken up.� There did not seem to be a
difference in the quality of rest experienced by people who experienced the
sleep benefit and those who did not. About a third of the study participants
experienced a sleep benefit even after taking a nap. Researchers came up with
several possible reasons for the finding, though they noted that they do not
know the exact mechanism. When somebody lacks sleep they produce melatonin. Melatonin reduces the levels of dopamine, the substance whose deficiency causes
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