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Chronotype affect

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https://www.readbyqxmd.com/read/28128995/later-chronotype-is-associated-with-higher-hemoglobin-a1c-in-prediabetes-patients
#1
Thunyarat Anothaisintawee, Dumrongrat Lertrattananon, Sangsulee Thamakaison, Kristen L Knutson, Ammarin Thakkinstian, Sirimon Reutrakul
The circadian system is known to play a role in glucose metabolism. Chronotype reflects the interindividual variability in the phase of entrainment. Those with later chronotype typically prefer later times in the day for different activities such as sleep or meals. Later chronotype has been shown to be associated with metabolic syndrome, increased diabetes risk and poorer glycemic control in type 2 diabetes patients. In addition, "social jetlag", a form of circadian misalignment due to a mismatch between social rhythms and the circadian clock, has been shown to be associated with insulin resistance...
January 27, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28055288/eveningness-as-a-risk-for-behavioral-problems-in-late-adolescence
#2
Ilona Merikanto, Anu-Katriina Pesonen, Liisa Kuula, Jari Lahti, Kati Heinonen, Eero Kajantie, Katri Räikkönen
Circadian preference toward eveningness has been associated with increased risk for mental health problems both in early adolescence and in adulthood. However, in late adolescence, when circadian rhythm naturally shifts to later, its significance for mental health is not clear. Accordingly, we studied how circadian rhythm estimated both by self-reported chronotype and by actigraph-defined midpoint of sleep was associated with self-reported psychiatric problems based on Youth Self Report (YSR). The study builds on a community cohort born in 1998, Helsinki, Finland...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28013233/the-influence-of-alertness-on-the-spatial-deployment-of-visual-attention-is-mediated-by-the-excitability-of-the-posterior-parietal-cortices
#3
Rebecca E Paladini, René M Müri, Jurka Meichtry, Tobias Nef, Fred W Mast, Urs P Mosimann, Thomas Nyffeler, Dario Cazzoli
With a reduced level of alertness, healthy individuals typically show a rightward shift when deploying visual attention in space. The impact of alertness on the neural networks governing visuospatial attention is, however, poorly understood. By using a transcranial magnetic stimulation twin-coil approach, the present study aimed at investigating the effects of an alertness manipulation on the excitability of the left and the right posterior parietal cortices (PPCs), crucial nodes of the visuospatial attentional network...
December 23, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27957554/morningness-eveningness-in-a-large-sample-of-german-adolescents-and-adults
#4
Christoph Randler, Katharina Freyth-Weber, Arash Rahafar, Andrea Florez Jurado, Jan Ole Kriegs
People differ in their sleep-wake behavior. This individual difference is conceptualized in different aspects, such as wake up times, bed times, times of peak performance, as well as in morning affect. A total of 14,987 visitors of an exhibition in the LWL State Museum of Natural History, Münster (Germany), did the survey on chronotype and gave their consent that these data can be used for a scientific study. Age groups were coded into 5-year bins. Mean age (mean ± SD) was 28.2 ± 17.5 years. There were 8075 females (54%) and 6912 males in the sample...
November 2016: Heliyon
https://www.readbyqxmd.com/read/27912863/circadian-rhythm-and-sleep-during-prolonged-antarctic-residence-at-chinese-zhongshan-station
#5
Nan Chen, Quan Wu, Yanlei Xiong, Guang Chen, Dandan Song, Chengli Xu
OBJECTIVE: Residence at Zhongshan Station (69°22'24″S, 76°22'40″E) for over 1 year exposes winter-over members to marked changes of light-dark cycle, ranging from the constant daylight of polar days to the constant darkness of polar nights, in addition to geographic and social isolation. This extreme photoperiodic environment may increase the risk of sleep disturbances and circadian desynchrony. The aim of this study was to investigate the circadian rhythm and sleep phase of Chinese winter-over expeditioners at Zhongshan Station...
December 2016: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/27791397/economic-decision-making-in-morning-evening-type-people-as-a-function-of-time-of-day
#6
Angel Correa, Noelia Ruiz-Herrera, Maria Ruz, Lorenzo Tonetti, Monica Martoni, Marco Fabbri, Vincenzo Natale
Decision-making is affected by psychological factors like emotional state or cognitive control, which may also vary with circadian rhythmicity. Here, we tested the influence of chronotype (32 morning-type versus 32 evening-type) and time of day (9 a.m. versus 5 p.m.) on interpersonal decision-making as measured by the Ultimatum Game. Participants had to accept or reject different economic offers proposed by a virtual participant. Acceptance involved distribution of gains as proposed, whereas rejection resulted in no gain for either player...
2017: Chronobiology International
https://www.readbyqxmd.com/read/27736199/morningness-eveningness-and-affective-temperaments-assessed-by-the-temperament-evaluation-of-memphis-pisa-and-san-diego-autoquestionnaire-temps-a
#7
Adrian Andrzej Chrobak, Anna Tereszko, Daria Dembinska-Krajewska, Aleksandra Arciszewska, Marcin Siwek, Dominika Dudek, Janusz Rybakowski
Chronotype is a stable trait presenting one's circardian preference. Since chronotype disturbances are common in patients with affective disorders, our aim is to evaluate chronotypes related to affective temperaments, measured with the temperament evaluation of Memphis, Pisa and San Diego-Autoquestionnaire (TEMPS-A). The study included 618 subjects (151 men and 467 women) within the framework of web-based design. They all fulfilled a questionnaire, consisting of the Composite Scale of Morningness (CSM), Sleep Wake Pattern Assessment Questionnaire (SWPAQ), and the TEMPS-A scale...
2017: Chronobiology International
https://www.readbyqxmd.com/read/27538100/epidemiological-study-on-chronotype-among-preschool-children-in-japan-prevalence-sleep-wake-patterns-and-associated-factors
#8
Yuriko Doi, Kaneyoshi Ishihara, Makoto Uchiyama
Our current 24-h society and the weekday-weekend switch of our social clocks may affect young children's sleep and circadian rhythms. However, such evidence is scarce. We conducted a nationwide epidemiological study of sleep and health in preschool children aged 3-5 years attending kindergarten or childcare centers in Japan, using stratified one-stage cluster sampling. The target population was 2 969 627 individuals (as of 1 April 2013). The Children's ChronoType Questionnaire was used to measure chronotypes (morning (M)-type, neither (N)-type and evening (E)-type), and weekday and weekend sleep-wake parameters...
2016: Chronobiology International
https://www.readbyqxmd.com/read/27530460/impact-of-sleep-behavior-on-glycemic-control-in-type-1-diabetes-the-role-of-social-jetlag
#9
Sandra Larcher, Anne-Sophie Gauchez, Sandrine Lablanche, Jean-Louis Pépin, Pierre-Yves Benhamou, Anne-Laure Borel
BACKGROUND: Sleep behavior is changing toward shorter sleep duration and a later chronotype. It results in a sleep debt that is acquitted on work-free days, inducing a small but recurrent sleep misalignment each week, referred to as "social jetlag". These sleep habits could affect health through misalignment with circadian rhythms. OBJECTIVES: The primary objective is to address the impact of sleep behavior on glycemic control, assessed by HbA1c, in patients with type 1 diabetes, independently of other lifestyle or sleep-related factors...
November 2016: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27423070/adhd-circadian-rhythms-and-seasonality
#10
Dora S Wynchank, Denise Bijlenga, Femke Lamers, Tannetje I Bron, Wim H Winthorst, Suzan W Vogel, Brenda W Penninx, Aartjan T Beekman, J Sandra Kooij
OBJECTIVE: We evaluated whether the association between Adult Attention-Deficit/Hyperactivity Disorder (ADHD) and Seasonal Affective Disorder (SAD) was mediated by the circadian rhythm. METHOD: Data of 2239 persons from the Netherlands Study of Depression and Anxiety (NESDA) were used. Two groups were compared: with clinically significant ADHD symptoms (N = 175) and with No ADHD symptoms (N = 2064). Sleep parameters were sleep-onset and offset times, mid sleep and sleep duration from the Munich Chronotype Questionnaire...
October 2016: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/27344501/circadian-phase-typing-in-idiopathic-generalized-epilepsy-dim-light-melatonin-onset-and-patterns-of-melatonin-secretion-semicurve-findings-in-adult-patients
#11
Raffaele Manni, Roberto De Icco, Riccardo Cremascoli, Giulia Ferrera, Francesca Furia, Elena Zambrelli, Maria Paola Canevini, Michele Terzaghi
OBJECTIVE/BACKGROUND: It has been debated in the literature whether patients with idiopathic generalized epilepsy (IGE) have a distinctive, evening-oriented chronotype. The few questionnaire-based studies that are available in the literature have conflicting results. The aim of our study was to define chronotype in patients with IGE by determining dim light melatonin onset (DLMO). PATIENTS/METHODS: Twenty adults diagnosed with IGE (grand mal on awakening [GM] in 7 cases and juvenile myoclonic epilepsy in 13 cases) were investigated by means of a face-to-face semistructured sleep interview, Morningness-Eveningness Questionnaire (MEQ), Pittsburgh Sleep Quality Index (PSQI) questionnaire, and a melatonin salivary test with DLMO determination...
August 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27259079/the-relation-between-chronotype-and-treatment-outcome-with-light-therapy-on-a-fixed-time-schedule
#12
Stefan E Knapen, Marijke C M Gordijn, Ybe Meesters
BACKGROUND: Seasonal affective disorder (SAD) is characterized by recurrent episodes of major depression in a seasonal pattern. The therapy of choice is light therapy (LT). It is suggested that LT should be administered relative to the chronotype of the patient, with the optimal timing earlier for morning than for evening types. This study aims to retrospectively investigate the relation between chronotype and the effect of LT on a fixed time in the morning in a population of SAD patients...
September 15, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27228576/managing-work-across-shifts-not-all-shifts-are-equal
#13
John Rodwell, Julian Fernando
PURPOSE: Despite the prevalence of shiftwork, the mechanisms underlying its effects on nurses' well-being and adaptation to the shifts are not fully understood. This study examines whether the characteristics of the person, particularly chronotype, and aspects of the situation (i.e., shift schedule and the nature of work on each shift for each work context) affect job-specific and general well-being above and beyond potential confounds such as age and negative affectivity (NA). DESIGN: Primarily surveys of Australian nurses (N = 446) in three contexts (general acute hospital, maternity hospital, aged care)...
July 2016: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/27174375/winter-is-coming-nightmares-and-sleep-problems-during-seasonal-affective-disorder
#14
Nils Sandman, Ilona Merikanto, Hanna Määttänen, Katja Valli, Erkki Kronholm, Tiina Laatikainen, Timo Partonen, Tiina Paunio
Sleep problems, especially nightmares and insomnia, often accompany depression. This study investigated how nightmares, symptoms of insomnia, chronotype and sleep duration associate with seasonal affective disorder, a special form of depression. Additionally, it was noted how latitude, a proxy for photoperiod, and characteristics of the place of residence affect the prevalence of seasonal affective disorder and sleep problems. To study these questions, data from FINRISK 2012 study were used. FINRISK 2012 consists of a random population sample of Finnish adults aged 25-74 years (n = 4905) collected during winter from Finnish urban and rural areas spanning the latitudes of 60°N to 66°N...
October 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27103930/diurnal-preference-predicts-phase-differences-in-expression-of-human-peripheral-circadian-clock-genes
#15
Andrew Ferrante, David Gellerman, Ahmet Ay, Kerri Pruitt Woods, Allan Michael Filipowicz, Kriti Jain, Neil Bearden, Krista Kenyon Ingram
BACKGROUND: Circadian rhythms play an integral role in human behavior, physiology and health. Individual differences in daily rhythms (chronotypes) can affect individual sleep-wake cycles, activity patterns and behavioral choices. Diurnal preference, the tendency towards morningness or eveningness among individuals, has been associated with interpersonal variation in circadian clock-related output measures, including body temperature, melatonin levels and clock gene mRNA in blood, oral mucosa, and dermal fibroblast cell cultures...
June 5, 2015: Journal of Circadian Rhythms
https://www.readbyqxmd.com/read/27091519/individual-differences-in-sleep-timing-relate-to-melanopsin-based-phototransduction-in-healthy-adolescents-and-young-adults
#16
Wisse P van der Meijden, Jamie L Van Someren, Bart H W Te Lindert, Jessica Bruijel, Floor van Oosterhout, Joris E Coppens, Andries Kalsbeek, Christian Cajochen, Patrice Bourgin, Eus J W Van Someren
STUDY OBJECTIVES: Individual differences in sleep timing have been widely recognized and are of particular relevance in adolescents and young adults who often show mild to severely delayed sleep. The biological mechanisms underlying the between-subject variance remain to be determined. Recent human genetics studies showed an association between sleep timing and melanopsin gene variation, but support for functional effects on downstream pathways and behavior was not demonstrated before...
1, 2016: Sleep
https://www.readbyqxmd.com/read/27082274/patterns-of-self-reported-depressive-symptoms-in-relation-to-morningness-eveningness-in-inpatients-with-a-depressive-disorder
#17
Matthias Johannes Müller, Christiane Olschinski, Bernd Kundermann, Nicole Cabanel
The stable and persisting preference for activities in the late evening (i.e. eveningness) is associated with a higher risk for depression, suicidality, and non-remission in major depression. The present study investigated symptom patterns in hospitalized patients with depressive syndromes in relation to morningness-eveningness (chronotypes). Depressive symptoms (Beck Depression Inventory [BDI-II]) and chronotype (German version of the Morningness-Eveningness Questionnaire [D-MEQ]) were assessed after admission and before discharge in inpatients with mainly major depression...
30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/26953619/chronotype-of-south-african-adults-is-affected-by-solar-entrainment
#18
MULTICENTER STUDY
Nyambura Shawa, Laura Catherine Roden
Our daily lives are influenced by three different daily timers: the solar clock, our endogenous circadian clock and the societal clock. The way an individual's endogenous clock synchronises to the solar clock, through either advances or delays relative to sunrise and sunset, results in a phenomenon known as diurnal preference or chronotype. South Africa uses just one time zone, but in the most easterly regions of the country, the sun rises and sets up to an hour earlier than in the most westerly regions throughout the year...
2016: Chronobiology International
https://www.readbyqxmd.com/read/26941366/shift-work-chronotype-and-melatonin-patterns-among-female-hospital-employees-on-day-and-night-shifts
#19
Michael Leung, Joan Tranmer, Eleanor Hung, Jill Korsiak, Andrew G Day, Kristan J Aronson
BACKGROUND: Shift work-related carcinogenesis is hypothesized to be mediated by melatonin; however, few studies have considered the potential effect modification of this underlying pathway by chronotype or specific aspects of shift work such as the number of consecutive nights in a rotation. In this study, we examined melatonin patterns in relation to shift status, stratified by chronotype and number of consecutive night shifts, and cumulative lifetime exposure to shift work. METHODS: Melatonin patterns of 261 female personnel (147 fixed-day and 114 on rotations, including nights) at Kingston General Hospital were analyzed using cosinor analysis...
2016: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/26930172/the-influence-of-chronotype-in-the-daily-lives-of-young-children
#20
Laura K Zimmermann
Research on chronotypic differences has been conducted for many years, however, until recently, little attention has been paid to young children. The current study examined the influence of morningness-eveningness in the daily lives of 2 to 4 year olds (291 females, 230 males, 8 gender not given) via an online survey completed by 529 mothers from across the United States. The results replicated previous findings on chronotypic differences in sleep-wake patterns and the development of morningness-eveningness in early childhood...
2016: Chronobiology International
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