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https://www.readbyqxmd.com/read/28529878/neuroimaging-in-pre-motor-parkinson-s-disease
#1
REVIEW
Thomas R Barber, Johannes C Klein, Clare E Mackay, Michele T M Hu
The process of neurodegeneration in Parkinson's disease begins long before the onset of clinical motor symptoms, resulting in substantial cell loss by the time a diagnosis can be made. The period between the onset of neurodegeneration and the development of motoric disease would be the ideal time to intervene with disease modifying therapies. This pre-motor phase can last many years, but the lack of a specific clinical phenotype means that objective biomarkers are needed to reliably detect prodromal disease...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28513079/rem-sleep-behavior-disorder-in-parkinson-s-disease-and-other-synucleinopathies
#2
REVIEW
Erik K St Louis, Angelica R Boeve, Bradley F Boeve
Rapid eye movement sleep behavior disorder is characterized by dream enactment and complex motor behaviors during rapid eye movement sleep and rapid eye movement sleep atonia loss (rapid eye movement sleep without atonia) during polysomnography. Rapid eye movement sleep behavior disorder may be idiopathic or symptomatic and in both settings is highly associated with synucleinopathy neurodegeneration, especially Parkinson's disease, dementia with Lewy bodies, multiple system atrophy, and pure autonomic failure...
May 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28513054/is-there-a-common-motor-dysregulation-in-sleepwalking-and-rem-sleep-behaviour-disorder
#3
Mehdi Haridi, Sebastian Weyn Banningh, Marion Clé, Smaranda Leu-Semenescu, Marie Vidailhet, Isabelle Arnulf
This study sought to determine if there is any overlap between the two major non-rapid eye movement and rapid eye movement parasomnias, i.e. sleepwalking/sleep terrors and rapid eye movement sleep behaviour disorder. We assessed adult patients with sleepwalking/sleep terrors using rapid eye movement sleep behaviour disorder screening questionnaires and determined if they had enhanced muscle tone during rapid eye movement sleep. Conversely, we assessed rapid eye movement sleep behaviour disorder patients using the Paris Arousal Disorders Severity Scale and determined if they had more N3 awakenings...
May 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28482056/rem-sleep-eeg-instability-in-rem-sleep-behavior-disorder-and-clonazepam-effects
#4
Raffaele Ferri, Francesco Rundo, Alessandro Silvani, Marco Zucconi, Oliviero Bruni, Luigi Ferini-Strambi, Giuseppe Plazzi, Mauro Manconi
Study Objectives: We aimed to analyze quantitatively REM sleep EEG in controls, drug-naïve idiopathic REM sleep behavior disorder patients (iRBD), and iRBD patients treated with clonazepam. Methods: Twenty-nine drug-naïve iRBD patients (mean age 68.2 years), 14 iRBD patients under chronic clonazepam therapy (mean age 66.3 years) and 21 controls (mean age 66.8 years) were recruited. Power spectra were obtained from sleep EEG (central derivation), using a 2-second sliding window, with 1-second steps...
May 6, 2017: Sleep
https://www.readbyqxmd.com/read/28479324/theta-oscillations-during-active-sleep-synchronize-the-developing-rubro-hippocampal-sensorimotor-network
#5
Carlos Del Rio-Bermudez, Jangjin Kim, Greta Sokoloff, Mark S Blumberg
Neuronal oscillations comprise a fundamental mechanism by which distant neural structures establish and express functional connectivity. Long-range functional connectivity between the hippocampus and other forebrain structures is enabled by theta oscillations. Here, we show for the first time that the infant rat red nucleus (RN)-a brainstem sensorimotor structure-exhibits theta (4-7 Hz) oscillations restricted primarily to periods of active (REM) sleep. At postnatal day 8 (P8), theta is expressed as brief bursts immediately following myoclonic twitches; by P12, theta oscillations are expressed continuously across bouts of active sleep...
May 3, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28472425/prodromal-parkinsonism-and-neurodegenerative-risk-stratification-in-rem-sleep-behaviour-disorder
#6
Thomas R Barber, Michael Lawton, Michal Rolinski, Samuel Evetts, Fahd Baig, Claudio Ruffmann, Aimie Gornall, Johannes C Klein, Christine Lo, Gary Dennis, Oliver Bandmann, Timothy Quinnell, Zenobia Zaiwalla, Yoav Ben-Shlomo, Michele Tm Hu
Objectives.: REM sleep behaviour disorder (RBD) is the most specific marker of prodromal alpha-synucleinopathies. We sought to delineate the baseline clinical characteristics of RBD and evaluate risk stratification models. Methods.: Clinical assessments were performed in 171 RBD, 296 control and 119 untreated Parkinson's (PD) subjects. Putative risk measures were assessed as predictors of prodromal neurodegeneration and Movement Disorders Society (MDS) criteria for prodromal PD were applied...
May 4, 2017: Sleep
https://www.readbyqxmd.com/read/28472332/the-spectrum-of-rem-sleep-related-episodes-in-children-with-type-1-narcolepsy
#7
Elena Antelmi, Fabio Pizza, Stefano Vandi, Giulia Neccia, Raffaele Ferri, Oliviero Bruni, Marco Filardi, Gaetano Cantalupo, Rocco Liguori, Giuseppe Plazzi
Type 1 narcolepsy is a central hypersomnia due to the loss of hypocretin-producing neurons and characterized by cataplexy, excessive daytime sleepiness, sleep paralysis, hypnagogic hallucinations and disturbed nocturnal sleep. In children, close to the disease onset, type 1 narcolepsy has peculiar clinical features with severe cataplexy and a complex admixture of movement disorders occurring while awake. Motor dyscontrol during sleep has never been systematically investigated. Suspecting that abnormal motor control might affect also sleep, we systematically analysed motor events recorded by means of video polysomnography in 40 children with type 1 narcolepsy (20 females; mean age 11...
May 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28468843/skin-nerve-phosphorylated-%C3%AE-synuclein-deposits-in-idiopathic-rem-sleep-behavior-disorder
#8
Elena Antelmi, Vincenzo Donadio, Alex Incensi, Giuseppe Plazzi, Rocco Liguori
OBJECTIVE: To test if phosphorylated α-synuclein (p-α-syn) deposits can be detected by means of skin biopsy in patients with idiopathic REM sleep behavior disorder (iRBD) as a potential early histopathologic marker of impending synucleinopathy. METHODS: Proximal (cervical) and distal (legs) samples of skin biopsy were obtained from 12 patients with polysomnographically confirmed iRBD and 55 sex- and age-matched healthy controls (HC). P-α-syn deposits were assessed with a monoclonal antibody against p-α-syn at serine 129, disclosed by an immunofluorescence method...
May 3, 2017: Neurology
https://www.readbyqxmd.com/read/28466429/sleep-disturbances-in-the-prodromal-stage-of-parkinson-disease
#9
REVIEW
Ahmed Al-Qassabi, Seyed-Mohammad Fereshtehnejad, Ronald B Postuma
Decades of research on neurodegenerative diseases such as Parkinson's disease (PD) have shifted our focus from clinical symptomatic stages to one step earlier, the prodromal stage. There is convincing evidence showing that sleep disorders such as excessive daytime somnolence, insomnia, obstructive sleep apnea, and particularly REM sleep behavior disorder (RBD) are potential prodromal features starting years and decades before conversion to PD. This review aims to provide an overview on various sleep disorders as prodromal features of PD...
June 2017: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/28455701/chronic-rem-sleep-restriction-in-juvenile-male-rats-induces-anxiety-like-behavior-and-alters-monoamine-systems-in-the-amygdala-and-hippocampus
#10
Janaína da Silva Rocha-Lopes, Ricardo Borges Machado, Deborah Suchecki
Adolescence is marked by major physiological changes, including those in the sleep-wake cycle, such as phase delay, which may result in reduced sleep hours. Sleep restriction and/or deprivation in adult rats activate stress response and seem to be a risk factor for triggering emotional disorders. In the present study, we sought to evaluate the behavioral and neurobiological consequences of prolonged REM sleep restriction in juvenile male rats. Immediately after weaning, on postnatal day 21, three males from each litter were submitted to REM sleep deprivation and the other three animals were maintained in their home-cages...
April 28, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28453473/prodromal-dementia-with-lewy-bodies-and-prodromal-alzheimer-s-disease-a-comparison-of-the-cognitive-and-clinical-profiles
#11
Dilman Sadiq, Tim Whitfield, Lean Lee, Tim Stevens, Sergi Costafreda, Zuzana Walker
BACKGROUND: Dementia must be diagnosed accurately and early in the disease course to allow pathology-specific treatments to be effective. Dementia with Lewy bodies (DLB) is often misdiagnosed as Alzheimer's disease (AD), especially at the prodromal stage. OBJECTIVE: To compare the clinical and neuropsychological profiles of Mild Cognitive Impairment (MCI) patients who, at follow-up, progressed to AD (retrospectively AD-MCI) or DLB (retrospectively DLB-MCI) or remained MCI...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28449905/sleep-wake-patterns-non-rapid-eye-movement-and-rapid-eye-movement-sleep-cycles-in-teenage-narcolepsy
#12
Xing Xu, Huijuan Wu, Jianhua Zhuang, Kun Chen, Bei Huang, Zhengqing Zhao, Zhongxin Zhao
BACKGROUND: To further characterize sleep disorders associated with narcolepsy, we assessed the sleep-wake patterns, rapid eye movement (REM), and non-REM (NREM) sleep cycles in Chinese teenagers with narcolepsy. METHODS: A total of 14 Chinese type 1 narcoleptic patients (13.4 ± 2.6 years of age) and 14 healthy age- and sex-matched control subjects (13.6 ± 1.8 years of age) were recruited. Ambulatory 24-h polysomnography was recorded for two days, with test subjects adapting to the instruments on day one and the study data collection performed on day two...
May 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28449901/diagnostic-rem-sleep-muscle-activity-thresholds-in-patients-with-idiopathic-rem-sleep-behavior-disorder-with-and-without-obstructive-sleep-apnea
#13
Stuart J McCarter, Erik K St Louis, David J Sandness, Ethan J Duwell, Paul C Timm, Bradley F Boeve, Michael H Silber
OBJECTIVES: We aimed to determine whether visual and automated rapid eye movement (REM) sleep without atonia (RSWA) methods could accurately diagnose patients with idiopathic REM sleep behavior disorder (iRBD) and comorbid obstructive sleep apnea (OSA). METHODS: In iRBD patients (n = 15) and matched controls (n = 30) with and without OSA, we visually analyzed RSWA phasic burst durations, phasic, tonic, and "any" muscle activity by 3-s mini-epochs, phasic activity by 30-s (AASM rules) epochs, and automated REM atonia index (RAI)...
May 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28429825/validation-of-the-mds-research-criteria-for-prodromal-parkinson-s-disease-longitudinal-assessment-in-a-rem-sleep-behavior-disorder-rbd-cohort
#14
Seyed-Mohammad Fereshtehnejad, Jacques Y Montplaisir, Amelie Pelletier, Jean-François Gagnon, Daniela Berg, Ronald B Postuma
BACKGROUND: Recently, the International Parkinson and Movement Disorder Society introduced the prodromal criteria for PD. Objectives Our study aimed to examine diagnostic accuracy of the criteria as well as the independence of prodromal markers to predict conversion to PD or dementia with Lewy bodies. METHODS: This prospective cohort study was performed on 121 individuals with rapid eye movement sleep behavior disorder who were followed annually for 1 to 12 years...
April 21, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28411417/heart-rate-variability-and-cordance-in-rapid-eye-movement-sleep-as-biomarkers-of-depression-and-treatment-response
#15
Marcel A Pawlowski, Mary Gazea, Bastian Wollweber, Martin Dresler, Florian Holsboer, Martin E Keck, Axel Steiger, Marek Adamczyk, Thorsten Mikoteit
OBJECTIVES: The relevance of rapid eye movement (REM) sleep in affective disorders originates from its well-known abnormalities in depressed patients, who display disinhibition of REM sleep reflected by increased frequency of rapid eye movements (REM density). In this study we examined whether heart rate variability (HRV) and prefrontal theta cordance, both derived from REM sleep, could represent biomarkers of antidepressant treatment response. METHODS: In an open-label, case-control design, thirty-three in-patients (21 females) with a depressive episode were treated with various antidepressants for four weeks...
April 2, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28409245/snca-3-utr-genetic-variants-in-patients-with-parkinson-s-disease-and-rem-sleep-behavior-disorder
#16
M Toffoli, E Dreussi, E Cecchin, M Valente, N Sanvilli, M Montico, S Gagno, M Garziera, M Polano, M Savarese, G Calandra-Buonaura, F Placidi, M Terzaghi, G Toffoli, G L Gigli
REM sleep behavior disorder (RBD) is an early marker of Parkinson's disease (PD); however, it is still unclear which patients with RBD will eventually develop PD. Single nucleotide polymorphisms (SNPs) in the 3'untranslated region (3'UTR) of alpha-synuclein (SNCA) have been associated with PD, but at present, no data is available about RBD. The 3'UTR hosts regulatory regions involved in gene expression control, such as microRNA binding sites. The aim of this study was to determine RBD specific genetic features associated to an increased risk of progression to PD, by sequencing of the SNCA-3'UTR in patients with "idiopathic" RBD (iRBD) and in patients with PD...
April 13, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28408635/cardiac-autonomic-control-and-complexity-during-sleep-are-preserved-after-chronic-sleep-restriction-in-healthy-subjects
#17
Eleonora Tobaldini, Naima Covassin, Andrew Calvin, Prachi Singh, Jan Bukartyk, Shiang Wang, Nicola Montano, Virend K Somers
Acute sleep deprivation (SD) alters cardiovascular autonomic control (CAC) and is associated with an increased risk of cardiovascular disorders. However, the effects of partial SD on CAC are unclear. Thus, we aimed to investigate the effects of partial SD on CAC during sleep. We randomized seventeen healthy subjects to a restriction group (RES, n = 8, subjects slept two-thirds of normal sleep time based on individual habitual sleep duration for 8 days and 8 nights) or a Control group (CON, n = 9, subjects were allowed to sleep their usual sleep time)...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28397169/sleep-disordered-breathing-in-duchenne-muscular-dystrophy
#18
REVIEW
Antonella LoMauro, Maria Grazia D'Angelo, Andrea Aliverti
This review aims to explain the inevitable imbalance between respiratory load, drive, and muscular force that occurs in the natural aging of Duchenne muscular dystrophy and that predisposes these patients to sleep disordered breathing (SDB). In DMD, SDB is characterized by oxygen desaturation, apneas, hypercapnia, and hypoventilation during sleep and ultimately develops into respiratory failure during wakefulness. It can be present in all age groups. Young patients risk obstructive apneas because of weight gain, secondary to progressive physical inactivity and prolonged corticosteroid therapy; older patients hypoventilate and desaturate because of respiratory muscle weakness, in particular the diaphragm...
May 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28389588/probable-rem-sleep-behavior-disorder-and-risk-of-stroke-a-prospective-study
#19
Chaoran Ma, Milena Pavlova, Yesong Liu, Ying Liu, Chunmei Huangfu, Shouling Wu, Xiang Gao
OBJECTIVE: To examine whether probable REM sleep behavior disorder (pRBD) was associated with increased risk of developing stroke in a community-based cohort. METHODS: The study included 12,003 participants (mean age 54.0 years) of the Kailuan Study, free of stroke, cancer, Parkinson disease, dementia, and head injury at baseline (2012). We determined pRBD using a validated REM sleep behavior disorder (RBD) questionnaire in 2012. Incident stroke cases were confirmed by review of medical records...
May 9, 2017: Neurology
https://www.readbyqxmd.com/read/28387681/prevalence-of-prodromal-parkinson-s-disease-as-defined-by-mds-research-criteria-among-elderly-patients-undergoing-colonoscopy
#20
Skorvanek Matej, Ladomirjakova Zuzana, Han Vladimir, Lesko Norbert, Feketeova Eva, Jarcuskova Dominika, Repkova Barbora, Spisak Peter, Urbancikova Zuzana, Vargova Adriana, Gombosova Laura, Zakuciova Maria, Veseliny Eduard, Trebuna Frantisek, Mechirova Eva, Gdovinova Zuzana
BACKGROUND: Gastrointestinal symptoms are a well-recognized and common premotor feature of Parkinson's disease (PD). Moreover, multiple studies have assessed the value of colonic α-synuclein as a potential marker of prodromal PD. Recently, the International Parkinson and Movement Disorders Society (MDS) defined research criteria for prodromal PD. OBJECTIVE: The aim of our study was to test the MDS research criteria in patients undergoing diagnostic colonoscopies as potential candidates for inclusion in prospective trials evaluating colonic biopsies as a potential biomarker of prodromal PD...
April 4, 2017: Journal of Parkinson's Disease
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