The Chronotype-Academic Performance Model (CAM): Daytime Sleepiness and Learning Motivation link Chronotype and School Performance in Adolescents

in Personality and Individual Differences (2013)

Rome III criteria in parents' hands: Pain-related functional gastrointestinal disorders in community children and associations with somatic complaints and mental health

in European Journal of Gastroenterology and Hepatology (2013)

Chronotype-related differences in childhood and adolescent aggression and antisocial behavior – A review of the literature

in Chronobiology International (2013)

Placebo effects in children: a review

in Pediatric Research (2013)

Mini-KiSS – das Therapeutenmanual zum Elterntraining für Kinder mit Schlafproblemen.

Book published by Kohlhammer (2013)

KiSS – Therapeutenmanual zur Behandlung von Kindern (5-10 Jahre) mit Schlafstörungen

Book published by Kohlhammer (2013)

Hypnotherapie

in Techniken der Psychotherapie. (2013)

Verhaltensbedingte Schlafprobleme in den ersten 4 Lebensjahren. Diagnostik und Therapie.

in Pädiatrische Praxis (2013)

Spannungskopfschmerzen in der pädiatrischen Versorgung

in Pädiatrische praxis (2013)

Of larks and hearts – morningness/eveningness, heart rate variability and cardiovascular stress response at different times of the day

in Physiology and Behavior (2012), 106 (2)

Inter-individual differences in the circadian period of physical and mental functions can be described on the dimension of morningness/eveningness. Previous findings support the assumption that ... [more ▼]

Inter-individual differences in the circadian period of physical and mental functions can be described on the dimension of morningness/eveningness. Previous findings support the assumption that eveningness is related to greater impulsivity and susceptibility to stress than morningness. Heart rate variability (HRV) serves as a physiological correlate of self- and emotional regulation and has not yet been investigated in relation to chronotypes. The study explores differences in HRV and other cardiovascular measures in morning- and evening-types at rest and under stress at different times of day (8-11 a.m. or 4-7 p.m.). Students (N = 471) were screened for chronotype and n = 55 females (27 morning- and 28 evening-types) were recruited for testing. These participants performed a mental arithmetic task while heart rate (HR) and blood pressure (BP) were recorded. Spectral components and a time-domain measure of HRV were calculated on HR data from resting and mental stress periods. Evening-types had significantly higher HR and systolic BP, but lower HRV than morning-types both at baseline and during stress. Stress induced in the evening had a significantly stronger impact on absolute and baseline corrected physiological measures in both chronotypes. The interaction of chronotype and testing time did not reach the level of significance for any of the dependent variables. The enhanced physiological arousal in evening-types might contribute to increased vulnerability to psychological distress. Hence, previous behavioral findings are supported by the physiological data of this study. [less ▲]