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https://www.readbyqxmd.com/read/28526480/human-seasonal-and-circadian-studies-in-antarctica-halley-75-0-s
#1
Josephine Arendt, Benita Middleton
Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75(0)S, the sun does not rise for 110 d in the winter and does not set for 100 d in summer. Photoperiod is the major time cue governing the timing of seasonal events such as reproduction in many species. The neuroendocrine signal providing photoperiodic information to body physiology is the duration of melatonin secretion which reflects the length of the night: longer in the short days of winter and shorter in summer...
May 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28526255/associations-of-objective-and-subjective-sleep-disturbance-with-cognitive-function-in-older-men-with-comorbid-depression-and-insomnia
#2
Daniel J Biddle, Sharon L Naismith, Kathleen M Griffiths, Helen Christensen, Ian B Hickie, Nicholas S Glozier
OBJECTIVES: To examine whether poor objective and subjective sleep quality are differentially associated with cognitive function. DESIGN: Cross-sectional. SETTING: Participants were recruited from primary and secondary care, and directly from the community, in Sydney, Australia. PARTICIPANTS: The sample consisted of 74 men 50years and older (mean [SD], 58.4 [6.2] years), with comorbid depression and above-threshold insomnia symptoms, participating in a trial of online cognitive behavioral therapy for insomnia...
June 2017: Sleep Health
https://www.readbyqxmd.com/read/28526252/determinants-of-sleep-behavior-in-adolescents-a-pilot-study
#3
Reut Gruber, Gail Somerville, Soukaina Paquin, Johanne Boursier
PURPOSE: To identify determinants of sleep behavior in adolescents of middle to high socioeconomic status. METHODS: Eighteen students (9 boys, 9 girls) with a mean age of 14.9±1.5years were interviewed using a standardized script inspired by the theory of planned behavior. Interviews were audio-recorded and anonymously transcribed verbatim. In addition, participants completed a survey assessing demographic and health characteristics and their sleep duration was measured using actigraphy...
June 2017: Sleep Health
https://www.readbyqxmd.com/read/28526251/asthma-related-lung-function-sleep-quality-and-sleep-duration-in-urban-children
#4
Daphne Koinis-Mitchell, Sheryl J Kopel, Ronald Seifer, Monique LeBourgeois, Elizabeth L McQuaid, Cynthia A Esteban, Julie Boergers, Jack Nassau, Michael Farrow, Gregory K Fritz, Robert B Klein
OBJECTIVES: Examine (1) the extent to which changes in objectively measured asthma-related lung function (forced expiratory volume in 1 second) within a sleep period are associated with sleep quality and sleep duration during that sleep period in a group of urban children with persistent asthma, (2) associations between morning and evening asthma-related lung function and sleep quality and duration on the adjacent night, and (3) whether these associations differ by ethnic group. DESIGN: Cross-sectional, multimethod approach...
June 2017: Sleep Health
https://www.readbyqxmd.com/read/28526249/modified-children-s-sleep-habits-questionnaire-for-behavioral-sleep-problems-a-validation-study
#5
Karen A Bonuck, Beth L Goodlin-Jones, Clyde Schechter, Judith Owens
OBJECTIVES: Behavioral sleep problems (BSPs) are prevalent and consequential in young children. There is a need for screening tools that identify BSPs-which are often rooted in the parent-young child relationship-and typically respond to behavior management. Such a tool would increase capacity to identify and treat BSPs. We sought to validate a short-form version of the widely used Children's Sleep Habits Questionnaire (SF-CSHQ) that omitted items that would not be responsive to behavioral strategies...
June 2017: Sleep Health
https://www.readbyqxmd.com/read/28525781/sleep-waves-and-recovery-from-drug-and-alcohol-dependence-towards-a-rhythm-analysis-of-sleep-in-residential-treatment
#6
Robert Meadows, Sarah Nettleton, Joanne Neale
This paper reports on a study of sleep amongst men and women who are living in residential rehabilitation centres in the UK and who are receiving support for their recovery from addiction to alcohol and other forms of substance use. Conceptually and methodologically, the paper draws on the work of the French sociologist Lefebvre and, in particular, his rhythmanalysis. We argue that this approach offers a useful way of exploring sleep in terms of biological, experiential, temporal, spatial and social rhythms...
May 6, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28522096/sleep-and-circadian-variability-in-people-with-delayed-sleep-wake-phase-disorder-versus-healthy-controls
#7
Helen J Burgess, Margaret Park, James K Wyatt, Muneer Rizvydeen, Louis F Fogg
OBJECTIVE/BACKGROUND: To compare sleep and circadian variability in adults with delayed sleep-wake phase disorder (DSWPD) to healthy controls. PATIENTS/METHODS: Forty participants (22 DSWPD, 18 healthy controls) completed a ten-day protocol, consisting of DLMO assessments on two consecutive nights, a five-day study break, followed by two more DLMO assessments. All participants were instructed to sleep within one hour of their self-reported average sleep schedule for the last four days of the study break...
June 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28522079/sleep-duration-is-associated-with-increased-risk-for-cardiovascular-outcomes-a-pilot-study-in-a-sample-of-community-dwelling-adults-in%C3%A2-ghana
#8
Helen V Cole, Ellis Owusu-Dabo, Juliet Iwelunmor, Valerie Newsome, Karlijn Meeks, Charles Agyemang, Girardin Jean-Louis
BACKGROUND: Associations between sleep duration and cardiovascular disease (CVD) risk factors have been demonstrated in past studies. However, previous studies have not investigated these relationships using objective sleep measures in sub-Saharan Africa. Our objective was to investigate the association between sleep duration and cardiovascular risk factors in a sample of community-dwelling Ghanaian adults. METHODS: We used wrist actigraphy along with a seven-day sleep diary to measure sleep duration, wake after sleep onset, sleep latency, and sleep quality...
June 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28511588/an-evening-milk-drink-can-affect-word-recall-in-indonesian-children-with-decreased-sleep-efficiency-a-randomized-controlled-trial
#9
Rini Sekartini, Dian Novita Chandra, Tiana Arsianti, Saptawati Bardosono, Tjhin Wiguna, Anne Schaafsma
STUDY OBJECTIVES: Sleep is important for memory consolidation in children. This study intended to find out whether an evening milk-based drink could influence sleep efficiency and memory recall in a group of Indonesian children (5-6 years old) with sleep deprivation. METHODS: Children were randomly allocated to one of three interventions: Reference product, satiety-stimulating product, and a relaxing product. The intervention lasted for 6 weeks and children consumed two servings per day of each 200 ml, the serving in the morning being the same for all children...
May 16, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28500965/resting-state-functional-connectivity-in-primary-insomnia-generalized-anxiety-disorder-and-controls
#10
Edward F Pace-Schott, Jared P Zimmerman, Ryan M Bottary, Erik G Lee, Mohammed R Milad, Joan A Camprodon
Sleep abnormalities are extremely common in anxiety disorders and may contribute to their development and persistence. Their shared pathophysiological mechanisms could thus serve as biomarkers or targets for novel therapeutics. Individuals with Primary Insomnia were age- and sex-matched to controls and to persons with Generalized Anxiety Disorder. All underwent fMRI resting-state scans at 3-T. In Primary Insomnia and controls, sleep was recorded for 2 weeks using diaries and actigraphy. All participants completed state-anxiety and neuroticism inventories...
May 8, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28489046/validity-of-research-grade-actigraphy-unit-for-measuring-exercise-intensity
#11
Ke-Tsung Han, Po-Ching Wang
This study was conducted in a free-living setting to investigate the measurement validity of a research-based actigraph for strolling and jogging, and to provide a reference for actual practice and research. Because inadequate physical activity (PA) or sedentary lifestyle has become the fourth leading risk factor for mortality worldwide, many countries have been vigorously promoting the concept of "active living", and the public has been investing greater effort into intensifying their PA. Although research-grade actigraphs have been widely applied to evaluate PA in routine environments, the measurement results may not accurately reflect the wearers' PA...
May 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28488270/rest-activity-rhythm-and-sleep-characteristics-associated-with-depression-symptom-severity-in-strained-dementia-caregivers
#12
Stephen F Smagula, Robert T Krafty, Briana J Taylor, Lynn M Martire, Richard Schulz, Martica H Hall
Depression is associated with disturbances to sleep and the 24-h sleep-wake pattern (known as the rest-activity rhythm: RAR). However, there remains a need to identify the specific sleep/RAR correlates of depression symptom severity in population subgroups, such as strained dementia caregivers, who are at elevated risk for major depressive disorder. We assessed the cross-sectional associations of sleep/RARs with non-sleep depression symptom severity among 57 (mean age: 74 years, standard deviation: 7.4) strained dementia caregivers who were currently without clinical depression...
May 10, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28483245/the-watch-pat-in-pediatrics-sleep-disordered-breathing-pilot-study-on-children-with-negative-nocturnal-pulse-oximetry
#13
Agostino Serra, Salvatore Cocuzza, Luigi Maiolino, Alessandro Abramo, Giacomo Spinato, Giovanni Tonoli, Maurizio Amadori, Doriano Politi, Giancarlo Tirelli, Roberto Spinato, Paola Di Mauro
OBJECTIVES: The main purpose of this study was to determine the efficacy of Watch-PAT in Pediatric Sleep Disordered Breathing (PSDB) diagnosis in children with symptoms suggestive of PSDB, in which the nocturnal pulse oximetry was negative according to the Brouilette criteria. METHODS: We enrolled 28 patients aged between 5 and 12 years (mean age: 7.75 ± 1.69), who underwent the registration with Watch-PAT, that utilizes the Peripheral Arterial Tone (PAT), AHI, RDI, body position, snoring, pulse oximetry and actigraphy...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28482312/poor-habitual-sleep-efficiency-is-associated-with-increased-cardiovascular-and-cortisol-stress-reactivity-in-men
#14
Stijn A A Massar, Jean C J Liu, Nabilah B Mohammad, Michael W L Chee
Inadequate sleep and psychological stress can both elevate physiological stress markers, such as cortisol. Prior studies that have applied induced psychosocial stress after a night of experimental sleep deprivation have found these effects to be compounded. We examined whether the relationship between stress reactivity and poor sleep also extends to habitual sleep patterns. Fifty-nine adult male participants were recruited. Habitual sleep patterns were monitored with actigraphy for a week. Participants subsequently underwent the Trier Social Stress Test...
April 28, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28482053/a-four-session-sleep-intervention-program-improves-sleep-for-older-adult-day-health-care-participants-results-of-a-randomized-controlled-trial
#15
Jennifer L Martin, Yeonsu Song, Jaime Hughes, Stella Jouldjian, Joseph M Dzierzewski, Constance H Fung, Juan Carlos Rodriguez Tapia, Michael N Mitchell, Cathy A Alessi
Study Objective: To test the effectiveness of a 4-week behavioral Sleep Intervention Program (SIP: sleep compression, modified stimulus control, and sleep hygiene) compared to a 4-week information-only control (IC) among older adults attending a VA Adult Day Health Care (ADHC) program in a double-blind, randomized, clinical trial. Methods: 42 individuals (mean age: 77 years, 93% male) enrolled in a VA ADHC program were randomized to receive SIP or IC. All completed in-person sleep and health assessments at baseline, post-treatment and 4-months follow-up that included 3 days/nights of wrist actigraphy, the Pittsburgh Sleep Quality Index (PSQI), and the Insomnia Severity Index (ISI)...
May 6, 2017: Sleep
https://www.readbyqxmd.com/read/28479021/what-keeps-children-with-cystic-fibrosis-awake-at-night
#16
Moya Vandeleur, Lisa M Walter, David S Armstrong, Philip Robinson, Gillian M Nixon, Rosemary S C Horne
BACKGROUND: Sleep disturbance is common in children with cystic fibrosis (CF) however there are limited studies investigating the causes for poor sleep quality. In a cross sectional observational study we aimed to evaluate the clinical correlates of sleep disturbance in this population. METHODS: Children with CF (7-18years) free from pulmonary exacerbation completed medical review, overnight oximetry, the OSA-18 and 14days of actigraphy recordings with a sleep diary...
May 4, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28472875/comparison-between-actigraphy-and-parental-reporting-for-sleep-assessment-in-hospitalized-infants
#17
Simone Ceratto, Paola Dalmasso, Roberto Miniero, Luca Cordero di Montezemolo, Francesco Savino
BACKGROUND: To compare data obtained through actigraphy with data from parental diaries to evaluate their concordance. METHODS: We enrolled 55 hospitalized infants aged 1-12 months with a gestational age higher than 35 weeks and without sleep disorders, complications due to perinatal events or movement deficits. They were monitored using both methods for 24 hours. Total diurnal and nocturnal sleep times and the numbers of awakenings were evaluated. Actigraph data were analyzed with Sadeh's algorithm...
May 4, 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28472528/internet-and-in-person-cognitive-behavioral-therapy-for-insomnia-in-military-personnel-a-randomized-clinical-trial
#18
Daniel J Taylor, Alan L Peterson, Kristi E Pruiksma, Stacey Young-McCaughan, Karin Nicholson, Jim Mintz
STUDY OBJECTIVES: Compare in-person and unguided Internet-delivered cognitive behavioral therapy for insomnia (CBTi) with a minimal contact control condition in military personnel. METHODS: A 3-arm parallel randomized clinical trial of 100 active duty US Army personnel at Fort Hood, Texas. Internet and in-person CBTi were comparable, except for the delivery format. The control condition consisted of phone call assessments. RESULTS: Internet and in-person CBTi both performed significantly better than the control condition on diary-assessed sleep efficiency (d = 0...
May 4, 2017: Sleep
https://www.readbyqxmd.com/read/28472447/actigraphic-sleep-duration-and-fragmentation-in-older-women-associations-with-performance-across-cognitive-domains
#19
Adam P Spira, Katie L Stone, Susan Redline, Kristine E Ensrud, Sonia Ancoli-Israel, Jane A Cauley, Kristine Yaffe
Study Objectives: To determine the association of actigraphic sleep duration and fragmentation with cognition in community-dwelling older women. Methods: We studied 782 women (mean age = 87.4) of varied cognitive status from the Study of Osteoporotic Fractures who completed wrist actigraphy and the 3MS, California Verbal Learning Test-II-Short Form, digit span, verbal fluency tests, and the Trailmaking Test, Part B (Trails B). Total sleep time (TST) and wake after sleep onset (WASO) tertiles were our primary predictors...
May 2, 2017: Sleep
https://www.readbyqxmd.com/read/28460798/from-the-midnight-sun-to-the-longest-night-sleep-in-antarctica
#20
REVIEW
Nathalie Pattyn, Martine Van Puyvelde, Helio Fernandez-Tellez, Bart Roelands, Olivier Mairesse
Sleep disturbances are the main health complaints from personnel deployed in Antarctica. The current paper presents a systematic review of research findings on sleep disturbances in Antarctica. The available sources were divided in three categories: results based on questionnaire surveys or sleep logs, studies using actigraphy, and data from polysomnography results. Other areas relevant to the issue were also examined. These included chronobiology, since the changes in photoperiod have been known to affect circadian rhythms, mood disturbances, exercise, sleep and hypoxia, countermeasure investigations in Antarctica, and other locations lacking a normal photoperiod...
March 14, 2017: Sleep Medicine Reviews
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