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REM sleep behavior disorder

Arlener D Turner, Andrew S Lim, Sue E Leurgans, David A Bennett, Aron S Buchman, Lisa L Barnes
OBJECTIVE: Assess the relationship of self-reported sleep quality and possible sleep disorders with disability in a racially diverse sample of community-dwelling older adults. METHODS: Participants included 943 non-demented older African Americans (n=452) and Whites (n=491) from two cohort studies, the Minority Aging Research Study (MARS) and the Rush Memory and Aging Project (MAP). Participants completed a 32-item questionnaire assessing sleep quality and the possible presence of three sleep disorders (sleep apnea, restless leg syndrome [RLS] and REM behavior disorder [RBD])...
October 20, 2016: Ethnicity & Disease
Erin Koffel, Imran S Khawaja, Anne Germain
Sleep disturbances are common in adults with PTSD and range from insomnia and nightmares to periodic leg movements and disruptive nocturnal behaviors. Together these findings suggest profound disturbances in rapid eye movement (REM) and non-REM (NREM) sleep, although there is a lack of consensus regarding a distinct profile of objective sleep disturbances associated with PTSD. Prospective, longitudinal studies have established that sleep disturbances represent a risk factor for the development and course of PTSD, suggesting that sleep is an important neurobiological mechanism in the etiology and maintenance of this disorder...
March 2016: Psychiatric Annals
Nicola Cellini
In recent years sleep-related memory consolidation has become a central topic in the sleep research field. Several studies have shown that in healthy individuals sleep promotes memory consolidation. Notwithstanding this, the consequences of sleep disorders on offline memory consolidation remain poorly investigated. Research studies indicate that patients with insomnia, obstructive sleep apnea, and narcolepsy often exhibit sleep-related impairment in the consolidation of declarative and procedural information...
September 25, 2016: Sleep Medicine Reviews
Mitchell G Miglis, Srikanth Muppidi, Emmanuel During, Safwan Jaradeh
PURPOSE: Data on the prevalence of RBD in patients with PAF are limited, with discrepancies in the literature regarding prevalence. We aimed to provide further data on this association with a series of eight patients with PAF. METHODS: We reviewed the electronic medical records of all patients seen at the Stanford neurology clinics from 2012 to 2016 who were given a provisional diagnosis of PAF (343 patients), and further screened by procedure codes to identify those patients who underwent both attended video-polysomonography and autonomic testing (18 patients), and met strict exclusionary criteria (8 patients)...
October 18, 2016: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
Youngsin Jung, Erik K St Louis
REM sleep behavior disorder (RBD) is a common parasomnia disorder affecting between 1 and 7 % of community-dwelling adults, most frequently older adults. RBD is characterized by nocturnal complex motor behavior and polysomnographic REM sleep without atonia. RBD is strongly associated with synucleinopathy neurodegeneration. The approach to RBD management is currently twofold: symptomatic treatment to prevent injury and prognostic counseling and longitudinal follow-up surveillance for phenoconversion toward overt neurodegenerative disorders...
November 2016: Current Treatment Options in Neurology
Tamara Shiner, Anat Mirelman, Mali Gana Weisz, Anat Bar-Shira, Elissa Ash, Ron Cialic, Naomi Nevler, Tanya Gurevich, Noa Bregman, Avi Orr-Urtreger, Nir Giladi
Importance: Mutations in the glucocerebrosidase (GBA) gene are a risk factor for the development of dementia with Lewy bodies (DLB). These mutations are common among Ashkenazi Jews (AJ) and appear to have an effect on the natural history of the disease. Objectives: To evaluate the clinical and genetic characteristics of an AJ cohort of patients diagnosed with DLB, assess the association of phenotype of DLB with GBA mutations, and explore the effects of these mutations on the clinical course of the disease...
October 10, 2016: JAMA Neurology
N A Amosova, I G Smolentseva, P M Guseinova, O A Maslyuk, E L Gavrilov
Disorders of sleep and wakefulness occur in about 60-98% of patients with Parkinson's disease (PD). The majority of research on the scale and nature of the disorders was performed in patients treated with antiparkinsonian drugs, and, therefore, the true picture of sleep disorders was interfering with side effects of therapy. The spectrum of these disorders in PD patients is broad and includes insomnia, parasomnia and hypersomnia. The main symptoms of insomnia are difficulty in maintaining sleep, associated with nocturia, rapid eye movement (REM) sleep behavior disorder (RBD), night cramps, akinesia and tremor...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Alexia M Thomas, Michael D Schwartz, Michael D Saxe, Thomas S Kilduff
STUDY OBJECTIVES: Although recent innovations have enabled modification of the rat genome, it is unclear whether enhanced utility of rodents as human disease models will result. We compared EEG and behavioral phenotypes of rats and mice with homozygous deletion of Cntnap2, a gene associated with cortical dysplasia-focal epilepsy (CDFE) and autism spectrum disorders (ASD). METHODS: Male Cntnap2 knockout (KO) and wild-type (WT) rats and male Cntnap2 KO and WT mice were implanted with telemeters to record EEG, EMG, body temperature and locomotor activity...
September 26, 2016: Sleep
Daphné Génier Marchand, Jacques Montplaisir, Ronald B Postuma, Shady Rahayel, Jean-François Gagnon
STUDY OBJECTIVES: Long-term studies in REM sleep behavior disorder (RBD) have shown a high rate of conversion into synucleinopathies. We aimed to prospectively follow up a large cohort of RBD patients to identify cognitive markers for early detection of prodromal dementia. METHODS: Seventy-six idiopathic RBD patients underwent polysomnography and a complete neuropsychological and neurological assessment and were then followed for a mean of 3.6 years. Cognitive characteristics at baseline were compared between patients who remained disease-free and those who developed a synucleinopathy, and between those who developed dementia first and those who developed parkinsonism first...
September 26, 2016: Sleep
Sara Marelli, Paola M V Rancoita, Federica Giarrusso, Andrea Galbiati, Marco Zucconi, Alessandro Oldani, Clelia Di Serio, Luigi Ferini-Strambi
We validated the Italian version of the rapid eye movement sleep behavior disorder (RBD) screening questionnaire (RBDSQ) and calculated its cut-off value for discriminating RBD group from other sleep disorders and healthy controls (HC). 380 patients with sleep disorders and 101 HC were enrolled. RBDSQ achieved an acceptable Cronbach's α value of 0.787 and item 10 was the only one with a very low item-total biserial correlation (0.141). At ROC analysis, we obtained an AUC of 0.888, denoting a good performance of the RBDSQ total score for predicting the RBD status...
September 26, 2016: Journal of Neurology
Victoria Mallett, Jay P Ross, Roy N Alcalay, Amirthagowri Ambalavanan, Ellen Sidransky, Patrick A Dion, Guy A Rouleau, Ziv Gan-Or
The lysosomal enzyme glucocerebrosidase (GCase), encoded by GBA, has an important role in Parkinson disease (PD). GBA mutation carriers have an increased risk for PD, earlier age at onset, faster progression, and various nonmotor symptoms including cognitive decline, REM sleep behavior disorder, hyposmia, and autonomic dysfunction.(1) Furthermore, GCase enzymatic activity is reduced in the peripheral blood(2) and brain(3) of noncarrier, sporadic PD patients. Biallelic GBA mutations, which have been classified as "severe" or "mild," may cause Gaucher disease (GD), a lysosomal storage disorder...
October 2016: Neurology. Genetics
Yan Ding, Yue-Qing Hu, Shu-Qin Zhan, Cun-Jiang Li, Hong-Xing Wang, Yu-Ping Wang
BACKGROUND: The brain stem is found to be impaired in multiple system atrophy-cerebellar types (MSA-C). Rapid eye movement (REM) sleep behavior disorder (RBD) is reported as a marker of progressive brain stem dysfunction. Few systematic studies about the sleep disturbances in MSA-C patients combined with or without RBD were reported. This study aimed to explore the polysomnographic (PSG) features of sleep disturbances between MSA-C patients with and without RBD. METHODS: Totally, 46 MSA-C patients (23 with RBD, and 23 without RBD) were enrolled in this study...
2016: Chinese Medical Journal
Fukie Niijima-Yaoita, Yuka Nagasawa, Masahiro Tsuchiya, Yuichiro Arai, Takeshi Tadano, Koichi Tan-No
Attention deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by inattention, hyperactivity, and impulsivity. We have previously shown that abnormal behaviors elicited by intermittent rapid eye movement (REM) sleep deprivation stress may fulfill the profile of a model of ADHD. It is well known that the impairment of spontaneous alternation behavior (SAB) in the Y-maze indicates inattentive features of ADHD model animals. On the other hand, it has been reported that nitric oxide (NO) in the hippocampus is required for SAB...
September 10, 2016: Neurochemistry International
Yan Wang, Yuechang Yang, Huijuan Wu, Danmei Lan, Ying Chen, Zhongxin Zhao
OBJECTIVES: REM sleep behavior disorder (RBD) is a common manifestation of Parkinson disease (PD). In this study, we assessed the effects of rotigotine transdermal patch on RBD features in patients with PD. METHODS: In this prospective open-label study, eleven PD patients with untreated RBD were administered rotigotine patches for up to seven months to ameliorate their parkinsonism. The severities of their RBD symptoms before and after rotigotine therapy were evaluated through patient and bed partner interviews, a validated evaluation scale (REM sleep behavior disorder questionnaire-Hong Kong, RBDQ-HK), and blinded assessments based on video-polysomnographic (VPSG) measure...
August 22, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
Julia Heller, Nikolina Brcina, Imis Dogan, Florian Holtbernd, Sandro Romanzetti, Jörg B Schulz, Johannes Schiefer, Kathrin Reetz
Idiopathic rapid eye movement (REM) sleep behavior disorder (RBD) is a parasomnia characterized by the loss of physiological atonia of skeletal muscles with abnormal behavior during dream sleep. RBD may be the initial manifestation of neurodegenerative diseases, particularly of α-synucleinopathies such as Parkinson's disease (PD), dementia with Lewy bodies (DLB), and multiple system atrophy (MSA). However, gauging the individual risk of subsequent phenoconversion and making assumptions on the type of disease that may subsequently follow RBD is challenging...
June 25, 2016: Sleep Medicine Reviews
Sung Hoon Kang, Hye Mi Lee, Woo-Keun Seo, Ji Hyun Kim, Seong-Beom Koh
BACKGROUND: Olfactory dysfunction and REM sleep behavior disorder (RBD) are recognized as pre-motor symptoms of Parkinson's disease (PD). Cognitive dysfunction is observed at a high rate even in the early stages of PD as an important non-motor symptom. PD has been classified in different subtypes and it is unknown if olfactory dysfunction and RBD occur more often in one particular subtype. We investigated the relationship between olfactory impairment, RBD, initial cognitive performance and motor phenotype in PD...
September 15, 2016: Journal of the Neurological Sciences
Zuzana Walker, Emilio Moreno, Alan Thomas, Fraser Inglis, Naji Tabet, Tim Stevens, Tim Whitfield, Dag Aarsland, Michael Rainer, Alessandro Padovani
OBJECTIVE: To test the hypothesis that core and suggestive features in possible dementia with Lewy bodies (DLB) would vary in their ability to predict an abnormal dopamine transporter scan and therefore a follow-up diagnosis of probable DLB. A further objective was to assess the evolution of core and suggestive features in patients with possible DLB over time depending on the (123)I-FP-CIT SPECT scan result. METHODS: A total of 187 patients with possible DLB (dementia plus one core or one suggestive feature) were randomized to have dopamine transporter imaging or to follow-up without scan...
September 6, 2016: Neurology
A Elbaz
In recent years, there has been a major shift in our understanding of the course of Parkinson's disease (PD) from a disease of the brain to a disease of long latency, characterized by the progressive emergence of multiple non-motor symptoms, including hyposmia, constipation, depression, anxiety, rapid eye movement (REM) sleep behavior disorder and excessive daytime sleepiness, as well as subtle motor signs, before the typical motor signs appear. Epidemiological studies have made major contributions by allowing better characterization of subsequent PD risk in relation to non-motor symptoms...
August 2016: Revue Neurologique
Nicholas Perentos, Amadeu Q Martins, Robin J M Cumming, Nadia L Mitchell, David N Palmer, Stephen J Sawiak, A Jennifer Morton
UNLABELLED: Sheep have large brains with human-like anatomy, making them a useful species for studying brain function. Sleep homeostasis has not been studied in sheep. Here, we establish correlates of sleep homeostasis in sheep through a sleep deprivation experiment. We then use these correlates to elucidate the nature of sleep deficits in a naturally occurring ovine model of neuronal ceroid lipofuscinosis (NCL, Batten disease) caused by a mutation in CLN5 In humans, mutations in this gene lead to cortical atrophy and blindness, as well as sleep abnormalities...
August 3, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Stuart J McCarter, Erik K St Louis, Bradley F Boeve
Sleep disorders appear to be frequent comorbidities in patients with frontotemporal dementia (FTD). Insomnia and excessive daytime sleepiness commonly occur in patients with FTD and significantly contribute to caregiver burden and burnout. Sleep is severely fragmented in FTD patients, likely secondary to behavioral disturbances, other primary sleep disorders such as sleep disordered breathing and restless leg syndrome, and neurodegeneration of nuclei involved in sleep and wakefulness. Treatment of primary sleep disorders may improve excessive daytime sleepiness and sleep quality and may improve daytime cognitive functioning...
September 2016: Current Neurology and Neuroscience Reports
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