Eleonora Del Prete1,2, Emmanuelle Schmitt1, Sara Meoni1,3, Valerie Fraix1,3, Anna Castrioto1,3, Pierre Pelissier1, Roberto Ceravolo2, Elena Moro4,5. 1. Movement Disorders Unit, Division of Neurology, CHU of Grenoble, Boulevard de la Chantourne La Tronche, 38043, Grenoble, France. 2. Department of Clinical and Experimental Medicine, Neurology Unit, University of Pisa, Pisa, Italy. 3. Grenoble Institute of Neurosciences, INSERM U1216, Grenoble Alpes University, Grenoble, France. 4. Movement Disorders Unit, Division of Neurology, CHU of Grenoble, Boulevard de la Chantourne La Tronche, 38043, Grenoble, France. emoro@chu-grenoble.fr. 5. Grenoble Institute of Neurosciences, INSERM U1216, Grenoble Alpes University, Grenoble, France. emoro@chu-grenoble.fr.
Abstract
INTRODUCTION: In Parkinson's disease (PD), non-motor fluctuations (NMFs), especially neuropsychiatric fluctuations, often coexist with motor fluctuations (MFs) but are often under-recognized by physicians and patients. OBJECTIVE: To investigate the relationship between MFs and neuropsychiatric fluctuations in PD. METHODS: PD patients with MFs and NMFs were enrolled. The Parkinson's Kinetigraph (PKG), a wearable device to detect MFs and dyskinesia, was used to confirm and measure MFs. The Neuropsychiatric Fluctuation Scale (NFS), a scale composed by subscores for both the ON and OFF neuropsychiatric states, was used to identify and quantify neuropsychiatric fluctuations. Patients were asked to wear the PKG for six consecutive days to identify the ON and OFF motor periods, and then to fill the NFS during the ON and OFF motor periods for three consecutive days wearing the PKG. The PKG system provided a bradykinesia score (BKS) and a dyskinesia score (DKS). Relations between BKS, DKS, and ON and OFF NFS subscores were analyzed. RESULTS: In 18 PD patients, anxiety, apathy, and depression characterized the OFF condition, whereas self-confidence, competency, and interest in doing things were typically in the ON condition. There was a positive correlation between the BKS and the OFF NFS subscores (p = 0.036, r = 0.51), whereas no correlation was found between the DKS and the ON NFS subscores (p = 0.38, r = 0.22). CONCLUSION: Neuropsychiatric fluctuations temporarily matched the OFF MFs only in the OFF condition. These findings are useful to better manage OFF NMSs and support the need to further investigate associations between non-motor and motor symptoms in PD patients.
INTRODUCTION: In Parkinson's disease (PD), non-motor fluctuations (NMFs), especially neuropsychiatric fluctuations, often coexist with motor fluctuations (MFs) but are often under-recognized by physicians and patients. OBJECTIVE: To investigate the relationship between MFs and neuropsychiatric fluctuations in PD. METHODS: PD patients with MFs and NMFs were enrolled. The Parkinson's Kinetigraph (PKG), a wearable device to detect MFs and dyskinesia, was used to confirm and measure MFs. The Neuropsychiatric Fluctuation Scale (NFS), a scale composed by subscores for both the ON and OFF neuropsychiatric states, was used to identify and quantify neuropsychiatric fluctuations. Patients were asked to wear the PKG for six consecutive days to identify the ON and OFF motor periods, and then to fill the NFS during the ON and OFF motor periods for three consecutive days wearing the PKG. The PKG system provided a bradykinesia score (BKS) and a dyskinesia score (DKS). Relations between BKS, DKS, and ON and OFF NFS subscores were analyzed. RESULTS: In 18 PD patients, anxiety, apathy, and depression characterized the OFF condition, whereas self-confidence, competency, and interest in doing things were typically in the ON condition. There was a positive correlation between the BKS and the OFF NFS subscores (p = 0.036, r = 0.51), whereas no correlation was found between the DKS and the ON NFS subscores (p = 0.38, r = 0.22). CONCLUSION: Neuropsychiatric fluctuations temporarily matched the OFF MFs only in the OFF condition. These findings are useful to better manage OFF NMSs and support the need to further investigate associations between non-motor and motor symptoms in PD patients.
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