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https://www.readbyqxmd.com/read/28810072/dreamless-the-silent-epidemic-of-rem-sleep-loss
#1
Rubin Naiman
We are at least as dream deprived as we are sleep deprived. Many of the health concerns attributed to sleep loss result from a silent epidemic of REM sleep deprivation. REM/dream loss is an unrecognized public health hazard that silently wreaks havoc with our lives, contributing to illness, depression, and an erosion of consciousness. This paper compiles data about the causes and extent of REM/dream loss associated with commonly used medications, endemic substance use disorders, rampant sleep disorders, and behavioral and lifestyle factors...
August 15, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28809932/rem-sleep-deprivation-induces-endothelial-dysfunction-and-hypertension-in-middle-aged-rats-roles-of-the-enos-no-cgmp-pathway-and-supplementation-with-l-arginine
#2
Jiaye Jiang, Zhongyuan Gan, Yuan Li, Wenqi Zhao, Hanqing Li, Jian-Pu Zheng, Yan Ke
Sleep loss can induce or aggravate the development of cardiovascular and cerebrovascular diseases. However, the molecular mechanism underlying this phenomenon is poorly understood. The present study was designed to investigate the effects of REM sleep deprivation on blood pressure in rats and the underlying mechanisms of these effects. After Sprague-Dawley rats were subjected to REM sleep deprivation for 5 days, their blood pressures and endothelial function were measured. In addition, one group of rats was given continuous access to L-arginine supplementation (2% in distilled water) for the 5 days before and the 5 days of REM sleep deprivation to reverse sleep deprivation-induced pathological changes...
2017: PloS One
https://www.readbyqxmd.com/read/28809834/quantifying-infra-slow-dynamics-of-spectral-power-and-heart-rate-in-sleeping-mice
#3
Laura M J Fernandez, Sandro Lecci, Romain Cardis, Gil Vantomme, Elidie Béard, Anita Lüthi
Three vigilance states dominate mammalian life: wakefulness, non-rapid eye movement (non-REM) sleep, and REM sleep. As more neural correlates of behavior are identified in freely moving animals, this three-fold subdivision becomes too simplistic. During wakefulness, ensembles of global and local cortical activities, together with peripheral parameters such as pupillary diameter and sympathovagal balance, define various degrees of arousal. It remains unclear the extent to which sleep also forms a continuum of brain states-within which the degree of resilience to sensory stimuli and arousability, and perhaps other sleep functions, vary gradually-and how peripheral physiological states co-vary...
August 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28808850/non-rem-sleep-disordered-breathing-affects-performance-on-the-psychomotor-vigilance-task
#4
Takuro Kitamura, Soichiro Miyazaki, Hiroshi Kadotani, Takashi Kanemura, Harun Bin Sulaiman, Shoko Takeuchi, Takahisa Tabata, Hideaki Suzuki
PURPOSE: Although many studies have investigated the clinical importance of sleep apnea on rapid eye movement (REM) and non-REM (NREM) sleep, the relationship between behavioral performance and apneic events during different sleep phases remains unclear. In the present study, we sought to investigate the effect of sleep phase fragmentation due to sleep-disordered breathing (SDB) during REM and NREM on the vigilance and sustainability of attention based on psychomotor vigilance task (PVT) performance...
August 14, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28805589/visual-dysfunction-in-parkinson-s-disease
#5
Richard A Armstrong
This chapter describes the visual problems likely to be encountered in Parkinson's disease (PD) and whether such signs are useful in differentiating the parkinsonian syndromes. Visual dysfunction in PD may involve visual acuity, contrast sensitivity, color discrimination, pupil reactivity, saccadic and pursuit eye movements, motion perception, visual fields, and visual processing speeds. In addition, disturbance of visuospatial orientation, facial recognition problems, rapid eye movement (REM) sleep behavior disorder, and chronic visual hallucinations may be present...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28805574/nonmotor-symptoms-in-vascular-and-other-secondary-parkinsonism
#6
Oleg S Levin, Achcha Sh Chimagomedova, Natalia A Skripkina, Elena A Lyashenko, Olga V Babkina
Vascular parkinsonism (VP) is a relatively frequent variant of secondary parkinsonism caused by ischemic or hemorrhagic lesions of basal ganglia, midbrain, or their links with frontal cortex. According to different investigations, various forms of cerebrovascular disease cause 1%-15% of parkinsonism cases. Nonmotor symptoms are frequently found in VP and may negatively influence on quality of life. However, nonmotor symptoms such as hallucinations, orthostatic hypotension, REM-sleep behavior disorder, and anosmia are rarely revealed in VP, which may be noted to another diagnosis or mixed pathology...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28805564/deep-brain-stimulation-and-nonmotor-symptoms
#7
Elliot Hogg, Jeffrey Wertheimer, Sarah Graner, Michele Tagliati
Deep brain stimulation (DBS) is currently the treatment of choice for advanced Parkinson's disease (PD). Several brain targets, including the subthalamic nucleus and the globus pallidus internus, have been successfully employed, with excellent motor outcomes. Despite less established knowledge, DBS may be a powerful tool for managing a wide variety of nonmotor symptoms (NMS) in PD patients, either directly or indirectly due to motor benefit or reduction of dopaminergic drug load. After an assessment of global nonmotor outcomes of DBS, as measured by currently available clinical scales and questionnaires, this chapter will address DBS effects on four main NMS categories: neurobehavioral, including cognitive and neuropsychiatric symptoms, autonomic dysfunction, including orthostatic hypotension, constipation, and urinary dysfunction, sleep disturbances, including insomnia, REM sleep behavior disorder, and restless leg syndrome, to conclude with sensory symptoms, mainly focusing on pain...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28805272/clinical-phenotype-of-south-east-asian-temporomandibular-disorder-patients-with-upper-airway-resistance-syndrome
#8
David K L Tay, Kenny P Pang
OBJECTIVE: To document the clinical phenotype of temporomandibular disorder (TMD) patients with concomitant upper airway resistance syndrome (UARS) in a South East Asian population. STUDY DESIGN: A multi-center prospective series of 86 TMD patients (26 men and 60 women / mean age 35.7 years) with UARS. All had excessive daytime sleepiness, high arousal index and apnea-hypopnea index (AHI)<5 RESULTS: The mean body mass index was 20.1, mean arousal index 16.2, mean respiratory disturbance index 19...
August 14, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28803382/cortical-afferent-inhibition-abnormalities-reveal-cholinergic-dysfunction-in-parkinson-s-disease-a-reappraisal
#9
REVIEW
Raffaele Nardone, Francesco Brigo, Viviana Versace, Yvonne Höller, Frediano Tezzon, Leopold Saltuari, Eugen Trinka, Luca Sebastianelli
Parkinson's disease (PD) is a multisystem neurodegenerative disorder affecting, besides the dopaminergic function, multiple neurotransmission systems, including the cholinergic system. Central cholinergic circuits of human brain can be tested non-invasively by coupling peripheral nerve stimulation with transcranial magnetic stimulation (TMS) of motor cortex; this test is named short latency afferent inhibition (SAI). SAI abnormalities have been reported in PD patients with gait disturbances and many non-motor symptoms, such as visual hallucinations (VHs), REM sleep behavior disorder (RBD), dysphagia, and olfactory impairment...
August 12, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28794189/time-of-day-influences-on-respiratory-sequelae-following-maximal-electroshock-induced-seizures-in-mice
#10
Benton S Purnell, Michael A Hajek, Gordon F Buchanan
Sudden unexpected death in epilepsy (SUDEP) is the leading cause of death in refractory epilepsy patients. While specific mechanisms underlying SUDEP are not well understood, evidence suggests most SUDEP occurs due to seizure-induced respiratory arrest. SUDEP also tends to happen at night. While this may be due to circumstances humans find themselves in at night, such as being alone without supervision or sleeping prone, or due to independent influences of sleep state, there are a number of reasons why the night (i...
August 9, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28791566/effects-of-antidepressants-on-sleep
#11
REVIEW
Adam Wichniak, Aleksandra Wierzbicka, Małgorzata Walęcka, Wojciech Jernajczyk
PURPOSE OF REVIEW: The aim of this review article was to summarize recent publications on effects of antidepressants on sleep and to show that these effects not only depend on the kind of antidepressant drugs but are also related to the dose, the time of drug administration, and the duration of the treatment. RECENT FINDINGS: Complaints of disrupted sleep are very common in patients suffering from depression, and they are listed among diagnostic criteria for this disorder...
August 9, 2017: Current Psychiatry Reports
https://www.readbyqxmd.com/read/28790302/formation-and-suppression-of-acoustic-memories-during-human-sleep
#12
Thomas Andrillon, Daniel Pressnitzer, Damien Léger, Sid Kouider
Sleep and memory are deeply related, but the nature of the neuroplastic processes induced by sleep remains unclear. Here, we report that memory traces can be both formed or suppressed during sleep, depending on sleep phase. We played samples of acoustic noise to sleeping human listeners. Repeated exposure to a novel noise during Rapid Eye Movements (REM) or light non-REM (NREM) sleep leads to improvements in behavioral performance upon awakening. Strikingly, the same exposure during deep NREM sleep leads to impaired performance upon awakening...
August 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28781201/seven-tesla-mri-of-the-substantia-nigra-in-patients-with-rapid-eye-movement-sleep-behavior-disorder
#13
Daniela Frosini, Mirco Cosottini, Graziella Donatelli, Mauro Costagli, Laura Biagi, Claudio Pacchetti, Michele Terzaghi, Pietro Cortelli, Dario Arnaldi, Enrica Bonanni, Michela Tosetti, Ubaldo Bonuccelli, Roberto Ceravolo
INTRODUCTION: Susceptibility-weighted imaging of the substantia nigra (SN) both at 7 and 3 Tesla (T) has shown high accuracy in distinguishing patients with Parkinson's disease (PD) and healthy subjects (HS). Patients with rapid eye movement (REM) behavior disorder (RBD) can develop synucleinopathies, and such risk is higher with dopamine transporter single photon emission tomography (123I-FP-CIT SPECT) evidence of nigro-striatal dysfunction. We aimed at evaluating SN 7T magnetic resonance imaging (7T-MRI) in patients with RBD and determining the agreement between MRI and 123I-FP-CIT SPECT...
August 2, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28777180/sleep-wake-disorders-of-childhood
#14
Suresh Kotagal
PURPOSE OF REVIEW: Sleep-wake disorders occur in 10% to 28% of children and differ somewhat in pathophysiology and management from sleep-wake disorders in adults. This article discusses the diagnosis and management of key childhood sleep disorders. RECENT FINDINGS: The role of sleep in memory consolidation and in the facilitation of learning has been increasingly recognized, even at the toddler stage. Cataplexy, a key feature of narcolepsy type 1, may be subtle in childhood and characterized by transient muscle weakness isolated to the face...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777179/comorbid-sleep-disturbances-in-neurologic-disorders
#15
Yo-El S Ju, Aleksandar Videnovic, Bradley V Vaughn
PURPOSE OF REVIEW: This article provides a review of disturbances of sleep comorbid with common neurologic disorders. RECENT FINDINGS: A wide variety of neurologic disorders are frequently complicated by comorbid sleep disturbances. In many cases, a bidirectional relationship appears to occur between sleep function and the neurologic disease, such that treatment of comorbid sleep disturbances may improve the symptoms of the neurologic disease. SUMMARY: Neurologic disorders are often associated with abnormalities of sleep...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777175/non-rapid-eye-movement-sleep-and-overlap-parasomnias
#16
Muna Irfan, Carlos H Schenck, Michael J Howell
PURPOSE OF REVIEW: This article reviews the spectrum of non-rapid eye movement (non-REM) sleep parasomnias, including sleepwalking, confusional arousals, and sleep terrors, which represent the range of phenotypic disorders of arousal from non-REM sleep that occurs in children and adults. RECENT FINDINGS: The International Classification of Sleep Disorders, Third Edition (ICSD-3) classifies parasomnias according to the sleep stage they emerge from: REM, non-REM, or other...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777174/rapid-eye-movement-sleep-behavior-disorder-and-other-rapid-eye-movement-sleep-parasomnias
#17
Birgit Ho Gl, Alex Iranzo
PURPOSE OF REVIEW: The most common rapid eye movement (REM) parasomnia encountered by neurologists is REM sleep behavior disorder (RBD), and nightmares are so frequent that every neurologist should be able to differentiate them from the dream enactment of RBD. Isolated sleep paralysis is relatively common and is often mistaken for other neurologic disorders. This article summarizes the current state of the art in the diagnosis of RBD, discusses the role of specific questionnaires and polysomnography in the diagnosis of RBD, and reviews recent studies on idiopathic RBD as an early feature of a synucleinopathy, secondary RBD, and its management...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777171/diagnostic-approach-and-investigation-in-sleep-medicine
#18
Michael H Silber
PURPOSE OF REVIEW: This article provides a clinical approach to the appropriate investigation and diagnosis of sleep disorders commonly seen by neurologists. RECENT FINDINGS: Home sleep apnea testing in appropriate situations can replace laboratory polysomnography in many cases of uncomplicated sleep apnea. Multiple sleep latency tests must be performed meticulously and interpreted in the clinical setting to avoid overdiagnoses of narcolepsy. Human leukocyte antigen testing has limited utility in establishing a diagnosis of narcolepsy because a positive test has low specificity...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28777170/brain-circuitry-controlling-sleep-and-wakefulness
#19
Richard L Horner, John H Peever
PURPOSE OF REVIEW: This article outlines the fundamental brain mechanisms that control sleep-wake patterns and reviews how pathologic changes in these control mechanisms contribute to common sleep disorders. RECENT FINDINGS: Discrete but interconnected clusters of cells located within the brainstem and hypothalamus comprise the circuits that generate wakefulness, non-rapid eye movement (non-REM) sleep, and REM sleep. These clusters of cells use specific neurotransmitters, or collections of neurotransmitters, to inhibit or excite their respective sleep- and wake-promoting target sites...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28776683/hypercapnia-induced-active-expiration-increases-in-sleep-and-enhances-ventilation-in-unanaesthetized-rats
#20
Isabela P Leirão, Carlos A Silva, Luciane H Gargaglioni, Glauber S F da Silva
Expiration is passive at rest but becomes active through recruitment of abdominal muscles under increased respiratory drive. Hypercapnia-induced active expiration has not been well explored in unanaesthetized rats. We hypothesized that (i) CO2 -evoked active expiration is recruited in a state-dependent manner i.e. differently in sleep or wakefulness and (ii) that recruitment of active expiration enhances ventilation, hence having an important functional role in meeting metabolic demand. To test these hypotheses Wistar rats (280-330 g) were implanted with electrodes for electroencephalography (EEG) and electromyography (EMG) of the neck, diaphragm (DIA) and abdominal (ABD) muscles...
August 3, 2017: Journal of Physiology
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