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Journal of Sleep Research

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https://www.readbyqxmd.com/read/28436130/sleep-complaints-associated-with-wish-to-die-after-a-suicide-crisis-an-exploratory-study
#1
Anca Mirsu-Paun, Isabelle Jaussent, Giovanni Komar, Philippe Courtet, Jorge Lopez-Castroman
The present study explores whether sleep concerns are associated with wish to die throughout a 1-month time interval following a suicide crisis. Sixty-eight patients admitted to the emergency department of a general or psychiatric hospital were enrolled. Sleep difficulties were assessed using the Insomnia Severity Index (ISI), the Epworth Sleepiness Scale, self-reported satisfaction with sleep and time in bed. Suicidal ideation was assessed through the presence of a wish to die at 1 month following a suicide crisis...
April 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28436072/real-time-individualization-of-the-unified-model-of-performance
#2
Jianbo Liu, Sridhar Ramakrishnan, Srinivas Laxminarayan, Thomas J Balkin, Jaques Reifman
Existing mathematical models for predicting neurobehavioural performance are not suited for mobile computing platforms because they cannot adapt model parameters automatically in real time to reflect individual differences in the effects of sleep loss. We used an extended Kalman filter to develop a computationally efficient algorithm that continually adapts the parameters of the recently developed Unified Model of Performance (UMP) to an individual. The algorithm accomplishes this in real time as new performance data for the individual become available...
April 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28425191/thank-god-it-s-friday-sleep-improved
#3
Helena Petersen, Göran Kecklund, Paolo D'Onofrio, John Axelsson, Torbjörn Åkerstedt
The weekend is usually seen as a window of recovery. Thus, sleep before a day off may be less impaired than that before a workday. However, very few polysomnographical studies have investigated this hypothesis. Therefore, the aim of the present study was to compare sleep before a workday with that before a weekend. Seventeen teachers participated. Sleep was recorded with polysomnography on one weekday night during the workweek, and on a workday (Friday) followed by a day off. Sleep diaries and actigraphs were also used...
April 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28425172/the-homeostatic-and-circadian-sleep-recovery-responses-after-total-sleep-deprivation-in-mice
#4
Garance Dispersyn, Fabien Sauvet, Danielle Gomez-Merino, Sylvain Ciret, Catherine Drogou, Damien Leger, Thierry Gallopin, Mounir Chennaoui
Many studies on sleep deprivation effects lack data regarding the recovery period. We investigated the 2-day homeostatic and circadian sleep recovery response to 24 h of total sleep deprivation (TSD) induced by brief rotation of an activity wheel. Eight mice were implanted with telemetry transmitters (DSI F40-EET) that recorded simultaneously their electroencephalography (EEG), locomotor activity and temperature during 24 h of baseline (BSL), TSD and 2 days of recovery (D1 and D2). In a second experiment, two groups of five non-implanted mice underwent TSD or ad libitum sleep, after which they were killed, adrenal glands were weighed and blood was collected for analysis of corticosterone concentration...
April 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28425149/bayes-theorem-and-the-rule-of-100-a-commentary-on-validity-of-administrative-data-for-identification-of-obstructive-sleep-apnea
#5
LETTER
Matt T Bianchi
No abstract text is available yet for this article.
April 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28401702/confirmatory-factor-analysis-of-the-sleep-disturbance-scale-for-children-sdsc-in-a-clinical-sample-of-children-and-adolescents
#6
Angela M Marriner, Carmela Pestell, Donna M Bayliss, Marie McCann, Romola S Bucks
The Sleep Disturbance Scale for Children was developed as a parent-report measure to screen for sleep disturbances within the preceding 6 months. Notably, the scale was developed using a sample of typically developing children and children with sleep disorders. The aim of this study was to factor analyse the Sleep Disturbance Scale for Children using a clinical sample of children with a range of neuropsychological conditions and co-morbidities, and determine whether the original six-factor structure was retained...
April 12, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28401614/suppression-of-interictal-spikes-during-phasic-rapid-eye-movement-sleep-a-quantitative-stereo-electroencephalography-study
#7
C Campana, F Zubler, S Gibbs, F de Carli, P Proserpio, A Rubino, M Cossu, L Tassi, K Schindler, L Nobili
Tonic and phasic rapid eye movement (REM) sleep seem to represent two different brain states exerting different effects on epileptic activity. In particular, interictal spikes are suppressed strongly during phasic REM sleep. The reason for this effect is not understood completely. A different level of synchronization in phasic and tonic REM sleep has been postulated, yet never measured directly. Here we assessed the interictal spike rate across non-REM (NREM) sleep, phasic and tonic REM sleep in nine patients affected by drug resistant focal epilepsy: five with type II focal cortical dysplasia and four with hippocampal sclerosis...
April 12, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28397310/creatine-supplementation-reduces-sleep-need-and-homeostatic-sleep-pressure-in-rats
#8
Markus Dworak, Tae Kim, Robert W Mccarley, Radhika Basheer
Sleep has been postulated to promote brain energy restoration. It is as yet unknown if increasing the energy availability within the brain reduces sleep need. The guanidine amino acid creatine (Cr) is a well-known energy booster in cellular energy homeostasis. Oral Cr-monohydrate supplementation (CS) increases exercise performance and has been shown to have substantial effects on cognitive performance, neuroprotection and circadian rhythms. The effect of CS on cellular high-energy molecules and sleep-wake behaviour is unclear...
April 11, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28382650/the-performance-of-critical-flicker-frequency-on-determining-of-neurocognitive-function-loss-in-severe-obstructive-sleep-apnea-syndrome
#9
Aygul Guzel, Emre Gunbey, Nurhan Koksal
This study aimed to compare the critical flicker frequency (CFF) and the mail-in cognitive function screening ınstrument (MCFSI) tests' effectiveness in diagnosing neurocognitive function losses in patients having severe obstructive sleep apnea syndrome (OSAS). A total of 85 subjects (47 patients with a diagnosis of severe OSAS and 38 healthy controls) were included into the study. MCFSI scores greater than or equal to five and CFF scores less than 39 Hz were considered abnormal. Demographic and polysomnographic parameters of patients with OSAS were studied, and correlations between the MCFSI, CFF scores and Epworth Sleepiness Scale (ESS) scores were analysed...
April 6, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28378384/short-interval-leg-movements-during-sleep-entail-greater-cardiac-activation-than-periodic-leg-movements-during-sleep-in-restless-legs-syndrome-patients
#10
Raffaele Ferri, Francesco Rundo, Alessandro Silvani, Marco Zucconi, Debora Aricò, Oliviero Bruni, Bartolo Lanuzza, Luigi Ferini-Strambi, Mauro Manconi
Periodic leg movements during sleep (PLMS) are sequences of ≥4 motor events with intermovement intervals (IMI) of 10-90 s. PLMS are a supportive diagnostic criterion for restless legs syndrome (RLS) and entail cardiac activation, particularly when associated with arousal. RLS patients also over-express short-interval leg movements during sleep (SILMS), which have IMI <10 s and are organized mainly in sequences of two movements (doublets). We tested whether the cardiac activation associated with SILMS doublets differs from that associated with PLMS in a sample of 25 RLS patients...
April 4, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28378365/sleep-quality-of-german-soldiers-before-during-and-after-deployment-in-afghanistan-a-prospective-study
#11
Heidi Danker-Hopfe, Cornelia Sauter, Jens T Kowalski, Stefan Kropp, Andreas Ströhle, Ulrich Wesemann, Peter L Zimmermann
In this prospective study, subjective sleep quality and excessive daytime sleepiness prior to, during and after deployment of German soldiers in Afghanistan were examined. Sleep quality (Pittsburgh Sleep Quality Index; PSQI) and daytime sleepiness (Epworth Sleepiness Scale; ESS) were assessed in 118 soldiers of the German army, who were deployed in Afghanistan for 6 months (deployment group: DG) and in 146 soldiers of a non-deployed control group (CG) at baseline. Results of the longitudinal analysis are reported, based on assessments conducted prior to, during the deployment and afterwards in the DG, and in the CG in parallel...
April 4, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28378363/impact-of-sleep-inertia-on-visual-selective-attention-for-rare-targets-and-the-influence-of-chronotype
#12
Hannah K Ritchie, Tina M Burke, Tristan B Dear, Andrew W Mchill, John Axelsson, Kenneth P Wright
Sleep inertia is affected by circadian phase, with worse performance upon awakening from sleep during the biological night than biological day. Visual search/selective visual attention performance is known to be sensitive to sleep inertia and circadian phase. Individual differences exist in the circadian timing of habitual wake time, which may contribute to individual differences in sleep inertia. Because later chronotypes awaken at an earlier circadian phase, we hypothesized that later chronotypes would have worse visual search performance during sleep inertia than earlier chronotypes if awakened at habitual wake time...
April 4, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28370716/a-sleep-position-trainer-for-positional-sleep-apnea-a-randomized-controlled-trial
#13
Rasmus R Laub, Philip Tønnesen, Poul J Jennum
We tested the effect of the Sleep Position Trainer, a vibrational device, for positional sleep apnea in an open, randomized controlled trial with 101 patients, where 52 patients were allocated to Sleep Position Trainer and 49 patients to a non-treatment control group for 2 months (Part 1). All patients were then followed as a cohort for a period of 6 months with use of the Sleep Position Trainer (Part 2). The participants were assessed with polygraphy at entry, and after 2 and 6 months. The mean apnea-hypopnea index supine was 35 per h (SD, 18) in the Sleep Position Trainer group and 38 per h (SD, 15) in the control group at entry...
March 31, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28370532/sleep-dependent-consolidation-of-face-recognition-and-its-relationship-to-rem-sleep-duration-rem-density-and-stage-2-sleep-spindles
#14
Elizaveta Solomonova, Philippe Stenstrom, Emilie Schon, Alexandra Duquette, Simon Dubé, Christian O'Reilly, Tore Nielsen
Face recognition is a highly specialized capability that has implicit and explicit memory components. Studies show that learning tasks with facial components are dependent on rapid eye movement and non-rapid eye movement sleep features, including rapid eye movement sleep density and fast sleep spindles. This study aimed to investigate the relationship between sleep-dependent consolidation of memory for faces and partial rapid eye movement sleep deprivation, rapid eye movement density, and fast and slow non-rapid eye movement sleep spindles...
March 31, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28370590/normative-data-on-the-diurnal-pattern-of-the-karolinska-sleepiness-scale-ratings-and-its-relation-to-age-sex-work-stress-sleep-quality-and-sickness-absence-illness-in-a-large-sample-of-daytime-workers
#15
Torbjorn Åkerstedt, David Hallvig, Göran Kecklund
Self-rated sleepiness responds to sleep loss, time of day and work schedules. There is, however, a lack of a normative reference showing the diurnal pattern during a normal working day, compared with a day off, as well as differences depending on stress, sleep quality, sex, age and being sick listed. The present study sought to provide such data for the Karolinska Sleepiness Scale. Participants were 431 individuals working in medium-sized public service units. Sleepiness (Karolinska Sleepiness Scale, scale 1-9) was rated at six times a day for a working week and 2 days off (>90...
March 29, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28349622/actigraphic-sleep-measures-and-diet-quality-in-the-hispanic-community-health-study-study-of-latinos-sue%C3%A3-o-ancillary-study
#16
Yasmin Mossavar-Rahmani, Jia Weng, Rui Wang, Pamela A Shaw, Molly Jung, Daniela Sotres-Alvarez, Sheila F Castañeda, Linda C Gallo, Marc D Gellman, Qibin Qi, Alberto R Ramos, Kathryn J Reid, Linda Van Horn, Sanjay R Patel
Using a cross-sectional probability sample with actigraphy data and two 24-h dietary recalls, we quantified the association between sleep duration, continuity, variability and timing with the Alternative Healthy Eating Index-2010 diet quality score and its components in 2140 Hispanic Community Health Study/Study of Latinos participants. The Alternative Healthy Eating Index diet quality-2010 score ranges from 0 to 110, with higher scores indicating greater adherence to the dietary guidelines and lower risk from major chronic disease...
March 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28349565/the-effect-on-sleep-of-being-on-call-an-experimental-field-study
#17
Carla M Ziebertz, Debby G J Beckers, Madelon L M Van Hooff, Michiel A J Kompier, Sabine A E Geurts
The aim of this study was to: (i) gain more insight into the relationship between being on-call and sleep and (ii) investigate the role of stress in this relationship. Data were collected by means of an experimental field study with a within-subject design (two conditions, random order). Ninety-six students participated during two consecutive nights: a reference night and a simulated on-call night without an actual call. Participants were told they could be called at any time during the on-call night. In the case of a call, participants had to perform online tasks for approximately 30 min...
March 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28332253/sex-and-ancestry-determine-the-free-running-circadian-period
#18
Charmane I Eastman, Victoria A Tomaka, Stephanie J Crowley
The endogenous, free-running circadian period (τ) determines the phase relationship that an organism assumes when entrained to the 24-h day. We found a shorter circadian period in African Americans compared to non-Hispanic European Americans (24.07 versus 24.33 h). We speculate that a short circadian period, closer to 24 h, was advantageous to humans living around the equator, but when humans migrated North out of Africa, where the photoperiod changes with seasons, natural selection favoured people with longer circadian periods...
March 23, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28326645/local-changes-in-the-wake-electroencephalogram-precedes-lane-departures
#19
Christer Ahlstrom, Sabina Jansson, Anna Anund
The objective of this exploratory study is to investigate if lane departures are associated with local sleep, measured via source-localized electroencephalography (EEG) theta power in the 5-9 Hz frequency range. Thirty participants drove in an advanced driving simulator, resulting in 135 lane departures at high levels of self-reported sleepiness. These lane departures were compared to matching non-departures at the same sleepiness level within the same individual. There was no correspondence between lane departures and global theta activity...
March 22, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28318068/helicid-alleviates-pain-and-sleep-disturbances-in-a-neuropathic-pain-like-model-in-mice
#20
Meng-Qi Zhang, Tian-Xiao Wang, Rui Li, Zhi-Li Huang, Wu-Jian Han, Xiao-Chang Dai, Yi-Qun Wang
Natural helicid (4-formylphenyl-O-β-d-allopyranoside), a main active constituent from seeds of the Chinese herb Helicia nilagirica, has been reported to exert a sedative, analgesic and hypnotic effect, and is used clinically to treat neurasthenic syndrome, vascular headaches and trigeminal neuralgia. In the current study, mechanical allodynia tests, electroencephalograms, electromyogram recordings and c-Fos expression in neuropathic pain-like model mice of partial sciatic nerve ligation were used to investigate the effect of helicid on neuropathic pain and co-morbid insomnia...
March 20, 2017: Journal of Sleep Research
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