Journal of Movement Disorders

Original Articles

Reliability and Validity of the Embouchure Dystonia Severity Rating Scale: Tobias Mantel, André Lee, Shinichi Furuya, Masanori Morise, Eckart Altenmüller, Bernhard Haslinger; J Mov Disord. 2023;16(2):191-195. Published online May 24, 2023; DOI: https://doi.org/10.14802/jmd.22213

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Abstract PDF Supplementary Material: Objective
Embouchure dystonia (ED) is a task-specific movement disorder that leads to loss of fine motor control of the embouchure and tongue muscles in wind musicians. In contrast to musicians’ hand dystonia, no validated severity rating for ED exists, posing a major obstacle for structured assessment in scientific and clinical settings. The aim of this study is to validate an ED severity rating scale (EDSRS) allowing for a standardized estimation of symptom severity in ED.
Methods
The EDSRS was set up as a composite score of six items evaluating audio-visual disease symptoms during the performance of three standardized musical tasks (sustained notes, scales, and fourths) separately for each body side. For validation, 17 musicians with ED underwent standardized audiovisual recordings during performance. Anonymized and randomized recordings were assessed by two experts in ED (raters). Statistical analysis included metrics of consistency, reliability, and construct validity with the fluctuation of the fundamental frequency of the acoustic signal (F0) (extracted in an audio analysis of the sustained notes).
Results
The EDSRS showed high internal consistency (Cronbach’s α = 0.975−0.983, corrected item-total correlations r = 0.90−0.96), interrater reliability (intraclass correlation coefficient [ICC] for agreement/consistency = 0.94/0.96), intrarater reliability over time (ICC per rater = 0.93/0.87) and good precision (standard error of measurement = 2.19/2.65), and correlated significantly with F0 variability (r = 0.55–0.60, p = 0.011–0.023).
Conclusion
The developed EDSRS is a valid and reliable tool for the assessment of ED severity in the hands of trained expert raters. Its easy applicability makes it suitable not only for routine clinical practice but also for scientific studies.

Rapid Eye Movement Sleep Behavior Disorder in Parkinson’s Disease: A Preliminary Study: Chang Soo Kim, Young Hee Sung, Min Ju Kang, Kee Hyung Park; J Mov Disord. 2016;9(2):114-119. Published online March 2, 2016; DOI: https://doi.org/10.14802/jmd.15039

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Objective
Rapid eye movement sleep behavior disorder (RBD) is associated with α-synucleinopathies, such as Parkinson’s disease (PD). We aimed to assess the differences in the clinical characteristics of PD with and without RBD.
Methods
Forty-two patients previously diagnosed with PD were evaluated for clinical history, motor and cognitive functioning using the Unified Parkinson’s Disease Rating Scale (UPDRS) and Mini-Mental State Examination (MMSE), autonomic symptoms, sleep characteristics using the Pittsburg Sleep Quality Index (PSQI), and the presence of RBD using the Korean version of the RBD screening questionnaire (RBDSQ). The prevalence of RBD and the patients’ demographic features were evaluated. The patients were classified into two groups, PD with RBD and PD without RBD, based on the RBDSQ scores. The motor and cognitive functions, as well as other clinical features of the two groups were compared.
Results
A total of 42 PD patients were enrolled. Eighteen patients were classified as PD with RBD. Compared to PD without RBD, PD with RBD showed higher scores of rigidity in the UPDRS subscale. Regarding sleep problems, PD with RBD revealed higher sleep disturbance, lower sleep efficiency, and lower overall sleep quality in the PSQI. There was no difference in cognitive dysfunction between the two groups according to the Korean version of the MMSE.
Conclusions
PD with RBD was associated with poorer sleep and motor symptoms. Therefore, RBD symptoms in PD are possibly poor prognostic markers.

Citations

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Cerebellar Microstructural Abnormalities in Parkinson’s Disease: a Systematic Review of Diffusion Tensor Imaging Studies
Maryam Haghshomar, Parnian Shobeiri, Seyed Arsalan Seyedi, Fatemeh Abbasi-Feijani, Amirhossein Poopak, Houman Sotoudeh, Arash Kamali, Mohammad Hadi Aarabi
The Cerebellum.2022; 21(4): 545. CrossRef
A data-driven system to identify REM sleep behavior disorder and to predict its progression from the prodromal stage in Parkinson's disease
Matteo Cesari, Julie A.E. Christensen, Maria-Lucia Muntean, Brit Mollenhauer, Friederike Sixel-Döring, Helge B.D. Sorensen, Claudia Trenkwalder, Poul Jennum
Sleep Medicine.2021; 77: 238. CrossRef
Impact of Obstructive Sleep Apnea on Cognitive and Motor Functions in Parkinson's Disease
Mohamed Elfil, Eshak I. Bahbah, Mahmoud M. Attia, Mohamed Eldokmak, Brian B. Koo
Movement Disorders.2021; 36(3): 570. CrossRef
Sleep Disorders and Cognitive Dysfunctions in Parkinson’s Disease: A Meta-Analytic Study
Gianpaolo Maggi, Luigi Trojano, Paolo Barone, Gabriella Santangelo
Neuropsychology Review.2021; 31(4): 643. CrossRef
Risk stratification for REM sleep behavior disorder in patients with Parkinson’s disease: A PRISMA-compliant meta-analysis and systematic review
Chengjuan Xie, Mingyu Zhu, Ying Hu
Clinical Neurology and Neurosurgery.2021; 202: 106484. CrossRef
REM sleep behavior disorder portends poor prognosis in Parkinson’s disease: A systematic review
Yoon Kim, Young Eun Kim, Eun Ok Park, Chae Won Shin, Han-Joon Kim, Beomseok Jeon
Journal of Clinical Neuroscience.2018; 47: 6. CrossRef
Prevalence of rapid eye movement sleep behavior disorder (RBD) in Parkinson’s disease: a meta and meta-regression analysis
Xiaona Zhang, Xiaoxuan Sun, Junhong Wang, Liou Tang, Anmu Xie
Neurological Sciences.2017; 38(1): 163. CrossRef
Clinical variations in Parkinson’s disease patients with or without REM sleep behaviour disorder: a meta-analysis
Ruo-lin Zhu, Cheng-juan Xie, Pan-pan Hu, Kai Wang
Scientific Reports.2017;[Epub] CrossRef

N30 Somatosensory Evoked Potential Is Negatively Correlated with Motor Function in Parkinson’s Disease: Suk Yun Kang, Hyeo-Il Ma; J Mov Disord. 2016;9(1):35-39. Published online January 25, 2016; DOI: https://doi.org/10.14802/jmd.15038

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4 Web of Science
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Abstract PDF

Objective
aaThe aim of this study was to investigate frontal N30 status in Parkinson’s disease (PD) and to examine the correlation between the amplitude of frontal N30 and the severity of motor deficits.
Methods
aaThe frontal N30 was compared between 17 PD patients and 18 healthy volunteers. Correlations between the amplitude of frontal N30 and the Unified Parkinson’s Disease Rating Scale (UPDRS) motor score of the more severely affected side was examined.
Results
aaThe mean latency of the N30 was not significantly different between patients and healthy volunteers (p = 0.981), but the mean amplitude was lower in PD patients (p < 0.025). There was a significant negative correlation between the amplitude of N30 and the UPDRS motor score (r = -0.715, p = 0.013).
Conclusions
The frontal N30 status indicates the motor severity of PD. It can be a useful biomarker reflecting dopaminergic deficits and an objective measurement for monitoring the clinical severity of PD.

Citations

Citations to this article as recorded by

Clinical factors affecting evoked magnetic fields in patients with Parkinson's disease
Ryoji Naganuma, Ichiro Yabe, Megumi Takeuchi, Kirari Morishita, Shingo Nakane, Ryoken Takase, Ikuko Takahashi-Iwata, Masaaki Matsushima, Mika Otsuki, Hideaki Shiraishi, Hidenao Sasaki, Wing-ho Yung
PLOS ONE.2020; 15(9): e0232808. CrossRef
Short-Term Effects of Thoracic Spine Manipulation on the Biomechanical Organisation of Gait Initiation: A Randomized Pilot Study
Sébastien Ditcharles, Eric Yiou, Arnaud Delafontaine, Alain Hamaoui
Frontiers in Human Neuroscience.2017;[Epub] CrossRef

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