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https://www.readbyqxmd.com/read/29413871/time-drawings-spatial-representation-of-temporal-concepts
#1
María Juliana Leone, Alejo Salles, Alejandro Pulver, Diego Andrés Golombek, Mariano Sigman
Time representation is a fundamental property of human cognition. Ample evidence shows that time (and numbers) are represented in space. However, how the conceptual mapping varies across individuals, scales, and temporal structures remains largely unknown. To investigate this issue, we conducted a large online study consisting in five experiments that addressed different time scales and topology: Zones of time, Seasons, Days of the week, Parts of the day and Timeline. Participants were asked to map different kinds of time events to a location in space and to determine their size and color...
February 4, 2018: Consciousness and Cognition
https://www.readbyqxmd.com/read/29408158/course-risk-factors-and-mental-health-outcomes-of-excessive-daytime-sleepiness-in-rural-chinese-adolescents-a-one-year-prospective-study
#2
Chunliu Luo, Jihui Zhang, Weijun Chen, Wanxian Lu, Jiyang Pan
BACKGROUND: This study aimed to examine the one-year incidence and persistence of excessive daytime sleepiness (EDS) in rural Chinese adolescents and their risk factors. In addition, we also aimed to explore the potential bidirectional associations of EDS with anxiety symptoms and depressive symptoms. METHODS: A total of 3736 adolescents from 5 high schools from rural area in the south China were eligible for follow-up. Among them, 2787 responded to follow-up after one year...
February 1, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29381407/premature-birth-and-circadian-preference-in-young-adulthood-evidence-from-two-birth-cohorts
#3
Johan Björkqvist, Anu-Katriina Pesonen, Liisa Kuula, Hanna-Maria Matinolli, Aulikki Lano, Marika Sipola-Leppänen, Marjaana Tikanmäki, Dieter Wolke, Marjo-Riitta Järvelin, Johan G Eriksson, Sture Andersson, Marja Vääräsmäki, Kati Heinonen, Katri Räikkönen, Petteri Hovi, Eero Kajantie
A preference for eveningness (being a "night owl") and preterm birth (<37 weeks of gestation) are associated with similar adversities, such as elevated blood pressure, impaired glucose regulation, poorer physical fitness, and lower mood. Yet, it remains unclear if and how preterm birth is associated with circadian preference. The aim of this study was to assess this association across the whole gestation range, using both objective and subjective measurements of circadian preference. Circadian preference was measured among 594 young adults (mean age 24...
January 30, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29363987/association-of-possible-sleep-bruxism-in-children-with-different-chronotype-profiles-and-sleep-characteristics
#4
Mariana Batista Ribeiro, Daniele Manfredini, Cláudia Tavares-Silva, Leandro Costa, Ronir Raggio Luiz, Saul Paiva, Júnia Maria Serra-Negra, Andréa Fonseca-Gonçalves, Lucianne Cople Maia
Sleep bruxism (SB) in children has been associated with several sleep characteristics, which may alter their sleep pattern. This change affects the internal biological clock and consequently the chronotype profile. The aim of this study was to evaluate the existence of an association between possible SB in children with specific chronotype profiles and sleep characteristics. The study included 207 parents/guardians of children aged between 3 and 12 years who were waiting for their children's dental treatment at the Pediatric Dentistry Clinic of the Federal University of Rio de Janeiro, Brazil...
January 24, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29357698/chronotype-is-associated-with-psychological-well-being-depending-on-the-composition-of-the-study-sample
#5
Annika Dimitrov, Ilya M Veer, Julia Kleeblatt, Florian Seyfarth, Till Roenneberg, Marcus Ising, Manfred Uhr, Martin E Keck, Achim Kramer, Maximilian Berger, Lara von Koch, Henrik Walter, Mazda Adli
Past studies examining the effect of chronotype and social jetlag on psychological well-being have been inconsistent so far. Here, we recruited participants from the general population and enquired about their natural sleeping behavior, sleep quality, depressive symptoms, and perceived stress. Partial correlations were computed between sleep variables and indicators of psychological well-being, controlling for age and sex. Less sleep during work days was found a good indicator for impairments in psychological well-being...
January 1, 2018: Journal of Health Psychology
https://www.readbyqxmd.com/read/29340848/validation-of-the-korean-munich-chronotype-questionnaire
#6
Sooyeon Suh, Soo Hyun Kim, Hyera Ryu, Su Jung Choi, Eun Yeon Joo
PURPOSE: The Munich Chronotype Questionnaire (MCTQ) assesses actual sleep-wake timing and has advantages compared to prior chronotype questionnaires in that it differentiates sleep-wake patterns between work days and free days and uses corrected mid-sleep time on free days after correcting for accumulated sleep debt over the week to categorize chronotype. The current study, we validated the Korean version of the MCTQ. METHODS: In this study, 310 participants (mean age = 27...
January 16, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29339309/late-chronotype-is-associated-with-enhanced-amygdala-reactivity-and-reduced-fronto-limbic-functional-connectivity-to-fearful-versus-happy-facial-expressions
#7
Charlotte Mary Horne, Ray Norbury
Increasing evidence suggests late chronotype individuals are at increased risk of developing depression. However, the underlying neural mechanisms that confer risk are not fully understood. Here, fifty healthy, right-handed individuals without a current or previous diagnosis of depression, family history of depression or sleep disorder underwent functional magnetic resonance imaging (FMRI). Participants completed an implicit emotion processing task (gender discrimination) including happy and fearful facial expressions...
January 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29329461/high-heritability-of-adolescent-sleep-wake-behavior-on-free-but-not-school-days-a-long-term-twin-study
#8
A P Inderkum, L Tarokh
Adolescence development is characterized by significant changes in sleep biology. Despite an overall decline in sleep duration and a delay in bedtime, significant inter-individual variation in sleep has been reported. The aim of the current study was to examine genetic and environmental influences on sleep in adolescence using long-term (6-month) actigraphy measurements, differentiating between school and free days. Sixteen monozygotic (MZ; n = 32) and 10 dizygotic (DZ; n = 20) twin pairs (mean age 12.8 ± 1...
January 10, 2018: Sleep
https://www.readbyqxmd.com/read/29283283/epidemiology-of-objectively-measured-bedtime-and-chronotype-in-us-adolescents-and-adults-nhanes-2003-2006
#9
Jacek K Urbanek, Adam P Spira, Junrui Di, Andrew Leroux, Ciprian Crainiceanu, Vadim Zipunnikov
BACKGROUND: We propose a method for estimating the timing of in-bed intervals using objective data in a large representative US sample, and quantify the association between these intervals and age, sex, and day of the week. METHODS: The study included 11,951 participants 6 years and older from the National Health and Nutrition Examination Survey (NHANES) 2003-2006, who wore accelerometers to measure physical activity for seven consecutive days. Participants were instructed to remove the device just before the nighttime sleep period and put it back on immediately after...
December 28, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29276481/is-8-30-a-m-still-too-early-to-start-school-a-10-00-a-m-school-start-time-improves-health-and-performance-of-students-aged-13-16
#10
Paul Kelley, Steven W Lockley, Jonathan Kelley, Mariah D R Evans
While many studies have shown the benefits of later school starts, including better student attendance, higher test scores, and improved sleep duration, few have used starting times later than 9:00 a.m. Here we report on the implementation and impact of a 10 a.m. school start time for 13 to 16-year-old students. A 4-year observational study using a before-after-before (A-B-A) design was carried out in an English state-funded high school. School start times were changed from 8:50 a.m. in study year 0, to 10 a...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29239697/who-is-sleepier-on-the-night-shift-the-influence-of-bio-psycho-social-factors-on-subjective-sleepiness-of-female-nurses-during-the-night-shift
#11
Nataly Zion, Anat Drach-Zahavy, Tamar Shochat
Sleepiness is a common complaint during the night shift and may impair performance. The current study aimed to identify bio-psycho-social factors associated with subjective sleepiness during the night shift. Ninety-two female nurses working rotating shifts completed a sociodemographic questionnaire, the Munich ChronoType Questionaire for shift workers, the Pittsburg Sleep Quality Index and the Pre-sleep Arousal Scale. Subjective sleepiness was measured hourly during two night shifts using the Karolinska Sleepiness Scale, and activity monitors assessed sleep duration 24-hours before each shift...
December 14, 2017: Ergonomics
https://www.readbyqxmd.com/read/29237053/beyond-sleep-duration-bidirectional-associations-between-chronotype-social-jetlag-and-drinking-behaviors-in-a-longitudinal-sample-of-us-high-school-students
#12
Denise L Haynie, Daniel Lewin, Jeremy W Luk, Leah M Lipsky, Fearghal O'Brien, Ronald J Iannotti, Danping Liu, Bruce G Simons-Morton
Health Behavior in School-Aged Children: NEXT Longitudinal Study 2009-2013, https://clinicaltrials.gov/ct2/show/NCT01031160?term=Simons-Morton&rank=3, NCT01031160.
December 9, 2017: Sleep
https://www.readbyqxmd.com/read/29221776/sleep-characteristics-associated-with-drowsy-driving
#13
Jun-Sang Sunwoo, Young Hwangbo, Won-Joo Kim, Min Kyung Chu, Chang-Ho Yun, Kwang Ik Yang
OBJECTIVE: The aim of this study was to evaluate sleep characteristics associated with drowsy driving in an adult population. METHODS: The study subjects consisted of 1675 adults aged 19 years or older who completed a population-based questionnaire survey on sleep habits. Experiences of drowsy driving were obtained from self-reported data. We investigated sleep-related variables including sleep duration, sleep efficiency, chronotype, subjective sleep perception, daytime sleepiness, sleep quality, and snoring...
December 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29157641/a-process-oriented-model-linking-adolescents-sleep-hygiene-and-psychological-functioning-the-moderating-role-of-school-start-times
#14
Jack S Peltz, Ronald D Rogge, Heidi Connolly, Thomas G O'Connor
OBJECTIVE: To examine a mediational model linking sleep hygiene to better mental health in adolescents via the mechanism of improved sleep quality, and to test the moderating role of school start times (SST) (before 8:30 AM vs. 8:30 AM or later) on that mediation model. DESIGN: Cross-sectional. SETTING: Online survey for high school students across the United States. PARTICIPANTS: A total of 197 adolescents aged 14-17 years old (Mage = 15...
December 2017: Sleep Health
https://www.readbyqxmd.com/read/29157006/chronotype-description-in-search-of-a-solid-subjective-amplitude-scale
#15
Halszka Oginska, Justyna Mojsa-Kaja, Olivier Mairesse
The term "subjective circadian amplitude" refers to the range or the distinctness of diurnal variations of arousal, that is, the awareness (or lack thereof) of difference between hyper- and hypo-activation phases, the ability to volitionally modulate one's own psychophysiological state, the strength of morning-evening preferences and flexibility of the rhythm or perceived stability of the circadian phase. The complexity of this construct is the source of difficulties in research and measurement. The psychometric features of distinctness subscales of the Chronotype Questionnaire and the Caen Chronotype Questionnaire are not satisfactory...
November 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29148844/circadian-phase-circadian-period-and-chronotype-are-reproducible-over-months
#16
Thomas Kantermann, Charmane I Eastman
The timing of the circadian clock, circadian period and chronotype varies among individuals. To date, not much is known about how these parameters vary over time in an individual. We performed an analysis of the following five common circadian clock and chronotype measures: 1) the dim light melatonin onset (DLMO, a measure of circadian phase), 2) phase angle of entrainment (the phase the circadian clock assumes within the 24-h day, measured here as the interval between DLMO and bedtime/dark onset), 3) free-running circadian period (tau) from an ultradian forced desynchrony protocol (tau influences circadian phase and phase angle of entrainment), 4) mid-sleep on work-free days (MSF from the Munich ChronoType Questionnaire; MCTQ) and 5) the score from the Morningness-Eveningness Questionnaire (MEQ)...
November 17, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29111446/high-and-low-use-of-electronic-media-during-nighttime-before-going-to-sleep-a-comparative-study-between-adolescents-attending-a-morning-or-afternoon-school-shift
#17
Arturo Arrona-Palacios
This study compared the effects of time spent on electronic media devices during nighttime before going to sleep on the sleep-wake cycle, daytime sleepiness, and chronotype in 568 Mexican students (288 girls, mean age = 14.08) attending a double school shift system (287 from morning shift and 281 from afternoon shift). Students completed anonymous self-report questionnaires. Results suggest that high exposure to an electronic media device may have an impact on their sleep-wake cycle, regardless of their school shift...
October 28, 2017: Journal of Adolescence
https://www.readbyqxmd.com/read/29106308/sleep-quality-and-methylation-status-of-core-circadian-rhythm-genes-among-nurses-and-midwives
#18
Agnieszka Bukowska-Damska, Edyta Reszka, Pawel Kaluzny, Edyta Wieczorek, Monika Przybek, Shanbeh Zienolddiny, Beata Peplonska
ABSTARCT Poor sleep quality or sleep restriction is associated with sleepiness and concentration problems. Moreover, chronic sleep restriction may affect metabolism, hormone secretion patterns and inflammatory responses. Limited recent reports suggest a potential link between sleep deprivation and epigenetic effects such as changes in DNA methylation profiles. The aim of the present study was to assess the potential association between poor sleep quality or sleep duration and the levels of 5-methylcytosine in the promoter regions of PER1, PER2, PER3, BMAL1, CLOCK, CRY1 CRY2 and NPAS2 genes, taking into account rotating night work and chronotype as potential confounders or modifiers...
2017: Chronobiology International
https://www.readbyqxmd.com/read/29061417/bipolar-disorder-in-asia-illness-course-and-contributing-factors
#19
REVIEW
Karthick Subramanian, Siddharth Sarkar, Shivanand Kattimani
BACKGROUND: Epidemiological studies analysing the course of Bipolar Disorder (BD) are relatively rare in the Asian context, contributing to the uncertainty regarding the prevalent course patterns and factors influencing such patterns. The current review identifies the regional characteristics of BD course patterns and the associated factors. METHODS: A review of the existing literature was done using 'PubMed' and 'Cochrane' databases which yielded 145 studies including those from all 48 Asian countries...
October 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/29031762/sleep-and-cognitive-performance-cross-sectional-associations-in%C3%A2-the%C3%A2-uk-biobank
#20
Simon D Kyle, Claire E Sexton, Bernd Feige, Annemarie I Luik, Jacqueline Lane, Richa Saxena, Simon G Anderson, David A Bechtold, William Dixon, Max A Little, David Ray, Dieter Riemann, Colin A Espie, Martin K Rutter, Kai Spiegelhalder
OBJECTIVE: The relationship between insomnia symptoms and cognitive performance is unclear, particularly at the population level. We conducted the largest examination of this association to date through analysis of the UK Biobank, a large population-based sample of adults aged 40-69 years. We also sought to determine associations between cognitive performance and self-reported chronotype, sleep medication use and sleep duration. METHODS: This cross-sectional, population-based study involved 477,529 participants, comprising 133,314 patients with frequent insomnia symptoms (age: 57...
October 2017: Sleep Medicine
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