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https://www.readbyqxmd.com/read/28338525/orexin-action-on-oxytocin-neurons-in-the-paraventricular-nucleus-of-the-hypothalamus
#1
Yuko Maejima, Shinichi Takahashi, Katsuya Takasu, Seiichi Takenoshita, Yoichi Ueta, Kenju Shimomura
Oxytocin neurons in the paraventricular nucleus (PVN) of the hypothalamus play an important role in food intake regulation. It has been shown that the secretion of oxytocin from the hypothalamus shows a diurnal circadian rhythmic pattern and disturbance of this pattern leads to the development of obesity. However, whether oxytocin secretion from the PVN has a diurnal pattern remains unknown. Here, we show that oxytocin secretion from the PVN does have a diurnal pattern and that the terminals of orexin neurons, the neuropeptide responsible for regulating the sleep-wake rhythm, are synapsed with PVN oxytocin neurons...
March 23, 2017: Neuroreport
https://www.readbyqxmd.com/read/28334632/longitudinal-relationships-of-sleep-and-inhibitory-control-deficits-to-early-adolescent-cigarette-and-alcohol-use
#2
Christopher M Warren, Nathaniel R Riggs, Mary Ann Pentz
Research in older adolescents suggests insufficient sleep may increase substance use initiation risk. This study tested whether sleep duration and dysregulation of sleep-wake patterns in late-elementary school youth were prospectively associated with cigarette and alcohol use initiation and how sleep-related changes in inhibitory control mediate these relationships. Average sleep duration at 4th grade predicted 6th grade cigarette but not alcohol use, however indirect effects were identified through 5th grade inhibitory control to both cigarette and alcohol use...
March 20, 2017: Journal of Adolescence
https://www.readbyqxmd.com/read/28332103/parental-behaviors-and-sleep-wake-patterns-of-infants-and-toddlers-in-hong-kong-china
#3
Xin-Ting Yu, Avi Sadeh, Hugh Simon Lam, Jodi A Mindell, Albert Martin Li
BACKGROUND: To describe the sleep patterns of children below 36 months in Hong Kong, and evaluate the associations between parental behaviors and childhood sleep/wake patterns. METHODS: Parents of 1049 infants and toddlers completed an internet-based expanded version of the Brief Infant Sleep Questionnaire. RESULTS: Total sleep duration (P<0.001), frequency (P<0.001) and duration (P<0.001) of nocturnal awakenings decreased with age, whereas the longest sleep duration (P<0...
March 22, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28329356/sleep-disturbances-and-risk-of-hospitalization-and-inpatient-days-among-older-women
#4
Misti L Paudel, Brent C Taylor, Tien N Vo, Allyson M Kats, John T Schousboe, Li-Yung Lui, Charles E McCulloch, Lisa Langsetmo, Sonia Ancoli-Israel, Susan Redline, Kristine Yaffe, Katie L Stone, Teresa A Hillier, Kristine E Ensrud
Study Objective: Determine the associations of sleep disturbances with hospitalization risk among older women. Methods: 1,827 women (mean age 83.6 years) participating in Study of Osteoporotic Fractures Year 16 (Y16) examination (2002-2004) linked with Medicare and/or HMO claims. At Y16 examination, sleep/wake parameters were measured by actigraphy (total sleep time [TST], sleep efficiency [SE], sleep latency [SL], and wake after sleep onset [WASO]) and subjective sleep measures (sleep quality [Pittsburgh Sleep Quality Index] and daytime sleepiness [Epworth Sleepiness Scale]) were assessed by questionnaire...
March 1, 2017: Sleep
https://www.readbyqxmd.com/read/28329204/new-neuroscience-tools-that-are-identifying-the-sleep-wake-circuit
#5
Priyattam J Shiromani, John H Peever
The complexity of the brain is yielding to technology. In the area of sleep neurobiology, conventional neuroscience tools such as lesions, cell recordings, c-Fos, and axon-tracing methodologies have been instrumental in identifying the complex and intermingled populations of sleep- and arousal-promoting neurons that orchestrate and generate wakefulness, NREM, and REM sleep. In the last decade, new technologies such as optogenetics, chemogenetics and the CRISPR-Cas system have begun to transform how biologists understand the finer details associated with sleep-wake regulation...
March 1, 2017: Sleep
https://www.readbyqxmd.com/read/28329124/sleep-and-alertness-in-medical-interns-and-residents-an-observational-study-on-the-role-of-extended-shifts
#6
Mathias Basner, David F Dinges, Judy A Shea, Dylan S Small, Jingsan Zhu, Laurie Norton, Adrian J Ecker, Cristina Novak, Lisa M Bellini, Kevin G Volpp
Study Objectives: Fatigue from sleep loss is a risk to physician and patient safety, but objective data on physician sleep and alertness on different duty hour schedules is scarce. This study objectively quantified differences in sleep duration and alertness between medical interns working extended overnight shifts and residents not or rarely working extended overnight shifts. Methods: Sleep-wake activity of 137 interns and 87 PGY-2/3 residents on 2-week Internal Medicine and Oncology rotations was assessed with wrist-actigraphy...
February 24, 2017: Sleep
https://www.readbyqxmd.com/read/28329120/sleep-wake-disturbances-after-traumatic-brain-injury-synthesis-of-human-and-animal-studies
#7
Danielle K Sandsmark, Jonathan E Elliott, Miranda M Lim
Sleep-wake disturbances following traumatic brain injury (TBI) are increasingly recognized as a serious consequence following injury and as a barrier to recovery. Injury-induced sleep-wake disturbances can persist for years, often impairing quality of life. Recently, there has been a nearly exponential increase in the number of primary research articles published on the pathophysiology and mechanisms underlying sleep-wake disturbances after TBI, both in animal models and human subjects, including in the pediatric population...
March 17, 2017: Sleep
https://www.readbyqxmd.com/read/28327443/correcting-delayed-circadian-phase-with-bright-light-therapy-predicts-improvement-in-adhd-symptoms-a-pilot-study
#8
Rachel E Fargason, Aaron D Fobian, Lauren M Hablitz, Jodi R Paul, Brittny A White, Karen L Cropsey, Karen L Gamble
Attention-deficit/hyperactivity disorder (ADHD) is a common condition with comorbid insomnia reported in >70% of children and adults. These patients demonstrate delays in sleep-wake rhythms, nocturnal rise in melatonin, and early morning rise in cortisol. Given that standard psychopharmacologic treatments for ADHD often do not completely control symptoms in participants with circadian rhythm delay, we sought to test whether bright light therapy (BLT) advances circadian rhythms and further reduces ADHD symptoms over standard treatments...
March 6, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28324298/circadian-disruption-associated-with-alzheimer-s-disease
#9
REVIEW
Yumna Saeed, Sabra M Abbott
Alzheimer's disease (AD) is increasing in prevalence and has a significant impact on caregivers and the healthcare system. One of the many physiologic process affected by AD is the circadian system, with disruption reflected in abnormalities of the sleep-wake cycle. This interaction is bidirectional, with circadian and sleep disruption influencing disease progression. Understanding the bidirectional relationship between AD and circadian disruption may allow for earlier recognition of the potential to develop dementia as well as improved targeted approaches for therapy...
April 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28324186/association-of-evening-smartphone-use-with-cardiac-autonomic-nervous-activity-after-awakening-in-adolescents-living-in-high-school-dormitories
#10
Yoko Nose, Rina Fujinaga, Maki Suzuki, Ikuyo Hayashi, Toshio Moritani, Kazuhiko Kotani, Narumi Nagai
PURPOSE: Smartphones are prevalently used among adolescents; however, nighttime exposure to blue-enriched light, through electric devices, is known to induce delays of the circadian rhythm phases and poor morning somatic conditions. We therefore investigated whether evening smartphone use may affect sleep-wake cycle and cardiac autonomic nervous system (ANS) activity after awaking in dormitory students. METHODS: The participants were high school students, living under dormitory rules regarding the curfew, study, meals, lights-out, and wake-up times...
March 21, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28323455/the-sleep-of-the-ring-comparison-of-the-%C3%A5-ura-sleep-tracker-against-polysomnography
#11
Massimiliano de Zambotti, Leonardo Rosas, Ian M Colrain, Fiona C Baker
OBJECTIVE/BACKGROUND: To evaluate the performance of a multisensor sleep-tracker (ŌURA ring) against polysomnography (PSG) in measuring sleep and sleep stages. PARTICIPANTS: Forty-one healthy adolescents and young adults (13 females; Age: 17.2 ± 2.4 years). METHODS: Sleep data were recorded using the ŌURA ring and standard PSG on a single laboratory overnight. Metrics were compared using Bland-Altman plots and epoch-by-epoch (EBE) analysis...
March 21, 2017: Behavioral Sleep Medicine
https://www.readbyqxmd.com/read/28322171/dopaminergic-modulation-of-sleep-wake-states
#12
Andrea Herrera-Solís, Wendy Herrera-Morales, Luis Núñez-Jaramillo, Oscar Arias-Carrión
The role of dopamine in sleep-wake regulation is associated as a wakefulness-promoting agent. For the clinical treatment of excessive daytime sleepiness, drugs have been commonly used to increase dopamine release. However, sleep disorders or lack of sleep is related to several dopamine-related disorders. The effects of dopaminergic agents, nevertheless, are mediated by two families of dopamine receptors, D1 and D2-like receptors; the first family increases adenylyl cyclase activity and the second inhibits adenylyl cyclase...
March 20, 2017: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/28322083/diurnal-variation-of-the-melanin-concentrating-hormone-level-in-the-hypothalamus
#13
Balázs Gerics, Ferenc Szalay, Péter Sótonyi, Veronika Jancsik
Melanin-concentrating hormone (MCH), the neuropeptide produced mainly in the hypothalamus, plays an operative role in regulating food intake and the sleep/wake cycle. Considering that these physiological functions pursue diurnal variations, we checked whether the total hypothalamic MCH level depends on the time of the day. The aggregated MCH peptide content of the whole MCH neuron population was significantly higher at the end of the sleeping period (lights on), than at the end of the active period (lights off)...
March 2017: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/28321642/circadian-rhythm-dysregulation-in-bipolar-spectrum-disorders
#14
REVIEW
Lauren B Alloy, Tommy H Ng, Madison K Titone, Elaine M Boland
PURPOSE OF REVIEW: We review recent evidence for circadian rhythm dysregulation in bipolar spectrum disorders (BSDs). We examine evidence for endogenous abnormalities in the biological clock and disruptions in the external entrainment of circadian rhythms in BSDs. We also address whether circadian dysregulation provides vulnerability to onset of BSD and evidence for a new integration of reward and circadian dysregulation in BSD. RECENT FINDINGS: Relative circadian phase delay (e...
April 2017: Current Psychiatry Reports
https://www.readbyqxmd.com/read/28318293/yawning-and-social-styles-different-functions-in-tolerant-and-despotic-macaques-macaca-tonkeana-and-macaca-fuscata
#15
Alessandra Zannella, Roscoe Stanyon, Elisabetta Palagi
Yawning is a multifunctional behavior with a role in social communication. In Old World monkeys, the "tension yawn" is often used as a threat, allowing individuals to completely expose their canines. To explore the role of this phenomenon, we selected 2 closely related species-Japanese macaques (Macaca fuscata) and Tonkean macaques (M. tonkeana)-which differ primarily in terms of their tolerance levels. Japanese macaques are classified as despotic; Tonkean macaques are classified as tolerant. Both species live in multimale-multifemale societies, show a high level of sexual dimorphism, and have comparable yawning repertoires that include displaying a covered teeth yawn and an uncovered gums yawn...
March 20, 2017: Journal of Comparative Psychology
https://www.readbyqxmd.com/read/28314820/amyloid-precursor-protein-in-drosophila-glia-regulates-sleep-and-genes-involved-in-glutamate-recycling
#16
Abud Jose Farca Luna, Magali Perier, Laurent Seugnet
The Amyloid Precursor Protein (App) plays a crucial role in Alzheimer disease (AD) via the production and deposition of toxic β-amyloid peptides. App is heavily expressed in neurons where the vast majority of studies investigating its function have been carried out, while almost nothing is known about its function in glia, where it is also expressed, and can potentially participate in the regulation of neuronal physiology. In this report, we investigated whether Appl, the Drosophila homolog of App, could influence sleep-wake regulation when its function is manipulated in glial cells...
March 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28314054/a-cross-sectional-survey-of-the-nature-and-correlates-of-sleep-disturbance-in-people-with-psoriasis
#17
A L Henry, S D Kyle, A Chisholm, C E M Griffiths, C Bundy
BACKGROUND: Research suggests that sleep disturbance is common in psoriasis. Despite 32 studies conducted in sleep, many demonstrate methodological flaws, often using unvalidated measurement, with no study examining multiple dimensions of sleep-wake functioning. Moreover, research has yet to comprehensively examine the range of physical and psychological factors that may affect sleep in people with psoriasis. OBJECTIVE: To characterise sleep disturbance using validated measures and identify physical and psychological predictors of sleep quality in people with psoriasis...
March 17, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28306414/cross-sectional-comparison-of-sleep-disordered-breathing-in-native-peruvian-highlanders-and-lowlanders
#18
Luu V Pham, Christopher Meinzen, Rafael S Arias, Noah G Schwartz, Adi Rattner, Catherine H Miele, Philip L Smith, Hartmut Schneider, J Jaime Miranda, Robert H Gilman, Vsevolod Y Polotsky, William Checkley, Alan R Schwartz
Pham, Luu V., Christopher Meinzen, Rafael S. Arias, Noah G. Schwartz, Adi Rattner, Catherine H. Miele, Philip L. Smith, Hartmut Schneider, J. Jaime Miranda, Robert H. Gilman, Vsevolod Y. Polotsky, William Checkley, and Alan R. Schwartz. Cross-sectional comparison of sleep-disordered breathing in native Peruvian highlanders and lowlanders. High Alt Med Biol. 18:11-19, 2017. BACKGROUND: Altitude can accentuate sleep disordered breathing (SDB), which has been linked to cardiovascular and metabolic diseases...
March 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28303945/dependence-of-nighttime-sleep-duration-in-one-month-old-infants-on-alterations-in-natural-and-artificial-photoperiod
#19
Sachiko Iwata, Fumie Fujita, Masahiro Kinoshita, Mitsuaki Unno, Takashi Horinouchi, Seiichi Morokuma, Osuke Iwata
Human sleep-wake cycles are entrained by both natural and artificial light-dark cycles. However, little is known regarding when and how the photoperiod changes entrain the biological clock after conception. To investigate the dependence of sleep patterns in young infants on the natural and artificial light-dark cycles, 1,302 pairs of one-month-old infants and their mothers were asked to answer a questionnaire. Birth in spring, longer daytime sleep duration, early/regular light-off times, and longer maternal nighttime sleep duration were identified as independent variables for longer infant nighttime sleep duration in both univariate and multivariate analyses...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302453/brain-rhythm-attractor-breakdown-in-alzheimer-s-disease-functional-and-pathologic-implications
#20
Elissaios Karageorgiou, Keith A Vossel
This perspective binds emerging evidence on the bidirectional relationship between Alzheimer's disease (AD) and sleep disorders through a model of brain rhythm attractor breakdown. This approach explains behavioral-cognitive changes in AD across the sleep-wake cycle and supports a causal association between early brainstem tau pathology and subsequent cortical amyloid-β accumulation. Specifically, early tau dysregulation within brainstem-hypothalamic nuclei leads to breakdown of sleep-wake attractor networks, with patients displaying an attenuated range of behavioral and electrophysiological activity patterns, a "twilight zone" of constant activity between deep rest and full alertness...
March 13, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
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