Affiliation: Karolinska Institutet
- Sleepiness and performance in response to repeated sleep restriction and subsequent recovery during semi-laboratory conditionsJohn Axelsson
Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
Chronobiol Int 25:297-308. 2008..Moreover, it is suggested to measure sleepiness in a standardized situation so as to minimize the influences of contextual factors...
- Beauty sleep: experimental study on the perceived health and attractiveness of sleep deprived peopleJohn Axelsson
Osher Center for Integrative Medicine, Department of Clinical Neuroscience, Karolinska Institutet, 17177 Stockholm, Sweden
BMJ 341:c6614. 2010..To investigate whether sleep deprived people are perceived as less healthy, less attractive, and more tired than after a normal night's sleep...
- Sleep homeostasis during repeated sleep restriction and recovery: support from EEG dynamicsTorbjorn Akerstedt
Stress Research Institute, University of Stockholm, Stockholm, Sweden
Sleep 32:217-22. 2009..The aim of the present study was to test the response to repeated partial sleep loss through detailed focus on spectral data and parts of sleep...
- 20th International Symposium on Shiftwork and Working Time: biological mechanisms, recovery, and risk management in the 24-h societyGoran Kecklund
Stress Research Institute, Stockholm Unversity, Stockholm, Sweden
Chronobiol Int 29:531-6. 2012..The majority of the papers are observational field studies, including some of large sample size, and three studies are well-designed laboratory experiments...
- Accounting for partial sleep deprivation and cumulative sleepiness in the Three-Process Model of alertness regulationTorbjorn Akerstedt
Stress Research Institute, University of Stockholm, Stockholm, Sweden
Chronobiol Int 25:309-19. 2008..2 on the 1-21 unit scale. It was concluded that the accumulation of sleep loss effects on subjective sleepiness may be accounted for by making the recovery function linear below a certain point on the otherwise exponential function...
- Sleeping during the day: effects on the 24-h patterns of IGF-binding protein 1, insulin, glucose, cortisol, and growth hormoneJavaid ur Rehman
Section for Psychology, Department of Clinical Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
Eur J Endocrinol 163:383-90. 2010..We investigated how an acute shift of sleep to the daytime affected IGF-binding protein 1 (IGFBP1), which is a risk factor for diabetes...
- Sleep and sleepiness in young individuals with high burnout scoresMarie Söderström
National Institute of Psychosocial Factors and Health, Stockholm, Sweden
Sleep 27:1369-77. 2004..The purpose was also to study the diurnal pattern of sleepiness, as well as ratings of work stress and mood in groups with different burnout scores...
- Effects of context on sleepiness self-ratings during repeated partial sleep deprivationTorbjorn Akerstedt
Stress Research Institute, Stockholm University, Stockholm, Sweden
Chronobiol Int 25:271-8. 2008..1 KSS units compared to the level of sleepiness self-rated at the end of the reaction-time test. Thus, the results of this study indicate that the context of a sleepiness rating affects the outcome of the rating...
- Short natural sleep is associated with higher T cell and lower NK cell activitiesElinor Fondell
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
Brain Behav Immun 25:1367-75. 2011..The stability of the findings as well as the clinical consequences of the link between short sleep and immune function should be explored in future studies...
- Less effective executive functioning after one night's sleep deprivationJens P Nilsson
National Institute for Psychosocial Medicine, Stockholm, Sweden
J Sleep Res 14:1-6. 2005..There were no group differences on psychomotor vigilance, verbal or visuo-spatial working memory. This extends previous knowledge of performance effects of SD, and may be of special importance for individuals with cognitive work tasks...
- Effects of examination stress on psychological responses, sleep and allergic symptoms in atopic and non-atopic studentsSusanna Jernelöv
Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
Int J Behav Med 16:305-10. 2009..Recent findings indicate that atopics may be more vulnerable to stress than non-atopics. However, the roles of psychological well-being and sleep in this presumed increased sensitivity are not known...
- Impaired sleep after bedtime stress and worriesTorbjorn Akerstedt
Institute for Psychosocial Medicine and Karolinska Institutet, Stockholm, Sweden
Biol Psychol 76:170-3. 2007..It was concluded that moderate increases in stress/worries at bedtime are associated with moderately impaired sleep...
- Efficacy of a behavioral self-help treatment with or without therapist guidance for co-morbid and primary insomnia--a randomized controlled trialSusanna Jernelöv
Department of Clinical Neuroscience, Karolinska Institutet, SE 171 77 Stockholm, Sweden
BMC Psychiatry 12:5. 2012..We hypothesized that a cognitive behaviorally based self-help book is effective to treat insomnia in individuals, also with co-morbid problems, and that the effect is enhanced by adding brief therapist telephone support...
- Learning in a simple biological system: a pilot study of classical conditioning of human macrophages in vitroGustav Nilsonne
Karolinska Institutet, Osher Center for Integrative Medicine, Department of Clinical Neuroscience, Stockholm, Sweden
Behav Brain Funct 7:47. 2011..Importantly, whether capacities for simple learning in single cells extend beyond habituation, and how this would be demonstrated, remain open questions...
- Recovery after shift work: Relation to coronary risk factors in womenJohn Axelsson
Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
Chronobiol Int 23:1115-24. 2006..It was also shown that susceptible shift workers had worse lipid profiles...
- Hormonal changes in satisfied and dissatisfied shift workers across a shift cycleJohn Axelsson
National Institute for Psychosocial Factors and Health, Stockholm, Sweden
J Appl Physiol 95:2099-105. 2003..Furthermore, morning cortisol was reduced across a shift cycle. It is suggested that reduced testosterone levels may be part of a mechanism of shift work maladjustment...
- Tolerance to shift work-how does it relate to sleep and wakefulness?John Axelsson
National Institute for Psychosocial Medicine, Box 230, 171 77 Stockholm, Sweden
Int Arch Occup Environ Health 77:121-9. 2004....
- Effects of acutely displaced sleep on testosteroneJohn Axelsson
National Institute for Psychosocial Medicine, 171 77 Stockholm, Sweden
J Clin Endocrinol Metab 90:4530-5. 2005..It is not yet clear whether the diurnal variation in testosterone is regulated by circadian or homeostatic (sleep) influences...
- Low diurnal variability of apolipoprotein A1, apolipoprotein B and apolipoprotein B/apolipoprotein A1 ratio during normal sleep and after an acute shift of sleepAnders Larsson
Section of Clinical Chemistry, Department of Medical Sciences, Uppsala University, 751 85 Uppsala, Sweden
Clin Biochem 41:859-62. 2008..The aim of this study was to study the diurnal variation of the cardiovascular risk markers apolipoprotein A1 and B and apo B/apo A1 ratio...
- The effects of asking for verbal ratings of sleepiness on sleepiness and its masking effects on performanceKosuke Kaida
National Institute of Occupational Safety and Health JNIOSH, 6 21 1, Nagao, Tamaku, Kawasaki, Kanagawa, Japan
Clin Neurophysiol 118:1324-31. 2007..This study investigated whether verbal rating sleepiness will itself affect sleepiness and performance...