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Chronotype affect

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https://www.readbyqxmd.com/read/27912863/circadian-rhythm-and-sleep-during-prolonged-antarctic-residence-at-chinese-zhongshan-station
#1
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
#2
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...
October 28, 2016: 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
#3
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...
October 13, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27538100/epidemiological-study-on-chronotype-among-preschool-children-in-japan-prevalence-sleep-wake-patterns-and-associated-factors
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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...
May 13, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27103930/diurnal-preference-predicts-phase-differences-in-expression-of-human-peripheral-circadian-clock-genes
#11
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...
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
#12
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...
June 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
#13
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...
May 30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/26953619/chronotype-of-south-african-adults-is-affected-by-solar-entrainment
#14
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
#15
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...
May 2016: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/26930172/the-influence-of-chronotype-in-the-daily-lives-of-young-children
#16
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
https://www.readbyqxmd.com/read/26785837/working-out-of-phase-with-reference-to-chronotype-compromises-sleep-quality-in-police-officers
#17
Arjita Yadav, Sangeeta Rani, Sudhi Singh
The aim of this work was to study the sleep characteristics, blood pressure (BP) and heart rate (HR) of the police officers working during out-of-phase (OP) and in-phase (IP) duty schedules with respect to their chronotypes. Adult male and female police officers (n = 85) were asked to answer Hindi/English version of different questionnaires to assess their chronotype (morningness-eveningness questionnaire; MEQ), PSQI scores (Pittsburgh sleep quality index), daytime sleepiness (Epworth sleepiness scale, ESS) and fatigue levels (fatigue severity scale, FSS) and fill a sleep log...
2016: Chronobiology International
https://www.readbyqxmd.com/read/26746321/-circadian-markers-and-genes-in-bipolar-disorder
#18
S Yeim, C Boudebesse, B Etain, F Belliviera
INTRODUCTION: Bipolar disorder is a severe and complex multifactorial disease, characterized by alternance of acute episodes of depression and mania/hypomania, interspaced by euthymic periods. The etiological determinants of bipolar disorder yet, are still poorly understood. For the last 30 years, chronobiology is an important field of investigation to better understand the pathophysiology of bipolar disorder. METHODS: We conducted a review using Medline, ISI Database, EMBase, PsyInfo up to January 2015, using the following keywords combinations: "mood disorder", "bipolar disorder", "depression", "unipolar disorder", "major depressive disorder", "affective disorder", for psychiatric conditions; and "circadian rhythms", "circadian markers", "circadian gene", "clock gene", "melatonin" for circadian rhythms...
September 2015: L'Encéphale
https://www.readbyqxmd.com/read/26709878/sleep-wake-pattern-chronotype-and-seizures-in-patients-with-epilepsy
#19
Su Jung Choi, Eun Yeon Joo, Seung Bong Hong
PURPOSE: Although mounting evidence suggests that sleep and epilepsy are reciprocal and seizures influence circadian rhythms, sleep-wake pattern and seizure control have not been widely researched. This study aimed to investigate the association of sleep-wake pattern, sleep quality, and chronotype with seizures in patients with epilepsy (PWE). METHODS: 160 consecutive PWE (aged 20-49 years, focal epilepsy, FE: generalized epilepsy, GE=127:33) and 130 age-gender matched healthy controls (HC) were enrolled...
February 2016: Epilepsy Research
https://www.readbyqxmd.com/read/26689749/identification-of-emotional-expressiveness-in-facial-photographs-over-36%C3%A2-h-of-extended-vigilance-in-healthy-young-men-a-preliminary-study
#20
Giuliano Emerenciano Ginani, Marcia Pradella-Hallinan, Sabine Pompéia
Changes in sleep patterns negatively influence some emotional responses, but their effects on facial expressiveness identification are unclear. To investigate these effects, 21 young, healthy, male volunteers of intermediate chronotype evaluated emotional expressiveness of faces depicting 6 basic emotions in 5 emotional gradients every 4 h over 36 h of continuous wakefulness. To measure attention and mood we used the Psychomotor Vigilance test and the Positive and Negative Affect Schedule Expanded, respectively...
February 2017: Cognition & Emotion
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