ARNALDI , Dario

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Objectives: Melatonin is a chronobiotic treatment which also alleviates rapid eye movement (REM) sleep behavior disorder (RBD). Because the mechanisms of this benefit are unclear, we evaluated the clock-dependent REM sleep characteristics in patients with RBD, whether idiopathic (iRBD) or associated with Parkinson's Disease (PD), and we...

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The term Lewy body diseases (LBDs) refers to a subset of neurodegenerative disorders that share the accumulation of the so-called Lewy bodies (LB) including: Parkinson's disease (PD), dementia with Lewy bodies (DLB), and PD later characterized by the occurrence of dementia (PDD). Moreover, multiple system atrophy (MSA) and idiopatic Rem...

Most people with idiopathic REM sleep behavior disorder (iRBD) have an underlying synucleinopathy, mainly Parkinson's disease (PD) or dementia with Lewy bodies, with median conversion time of 4-9 y from iRBD diagnosis and of 11-16 y from symptom onset. Subtle signs and imaging tests indicate concomitant neurodegeneration in widespread brain...

Study Objectives: Rigidity is a muscle hypertonia typical of Parkinson disease (PD), whereas rapid eye movement (REM) sleep behavior disorder (RBD) is characterized by abnormally increased muscle tone during REM sleep (REM sleep without atonia) and enacting dream behaviors. Because movements are not bradykinetic during RBD in patients with PD,...

Several non motor symptoms (NMS) can precede the onset of the classical motor Parkinson's disease (PD) syndrome. The existence of pre-motor and even pre-clinical PD stages has been proposed but the best target population to be screened to disclose PD patients in a pre-clinical, thus asymptomatic, stage is still matter of debate. The REM sleep...

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