Bjørn Bjorvatn

Summary

Affiliation: University of Bergen
Country: Norway

Publications

  1. doi request reprint A self-help book is better than sleep hygiene advice for insomnia: a randomized controlled comparative study
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Scand J Psychol 52:580-5. 2011
  2. pmc Sleep disturbances in an arctic population: the Tromsø Study
    Arne Fetveit
    Department of General Practice and Community Medicine, University of Oslo, PO Box 1130 Blindern, 0317 Oslo, Norway
    BMC Health Serv Res 8:117. 2008
  3. ncbi request reprint Prevalence, severity and risk factors of restless legs syndrome in the general adult population in two Scandinavian countries
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31 N 5018, Bergen, Norway
    Sleep Med 6:307-12. 2005
  4. ncbi request reprint Subjective and objective measures of adaptation and readaptation to night work on an oil rig in the North Sea
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Sleep 29:821-9. 2006
  5. doi request reprint [Insomnia]
    Bjørn Bjorvatn
    Institutt for samfunnsmedisinske fag Universitetet i Bergen, Postboks 7804, 5020 Bergen og Nasjonalt kompetansesenter for søvnsykdommer, Haukeland Universitetssykehus, Bergen, Norway
    Tidsskr Nor Laegeforen 129:1766-8. 2009
  6. ncbi request reprint The association between sleep duration, body mass index and metabolic measures in the Hordaland Health Study
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    J Sleep Res 16:66-76. 2007
  7. ncbi request reprint Randomized placebo-controlled field study of the effects of bright light and melatonin in adaptation to night work
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, N 5018 Bergen, Norway
    Scand J Work Environ Health 33:204-14. 2007
  8. ncbi request reprint [Periodic limb movements in sleep--can and should this condition be treated?]
    B Bjorvatn
    Bergen Søvnsenter Nattlandsveien 8, Seksjon for allmennmedisin Locus for nevrovitenskap Universitetet i Bergen
    Tidsskr Nor Laegeforen 121:2169-72. 2001
  9. doi request reprint A practical approach to circadian rhythm sleep disorders
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, N 5018 Bergen, Norway
    Sleep Med Rev 13:47-60. 2009
  10. ncbi request reprint Effects of sleep deprivation on extracellular serotonin in hippocampus and frontal cortex of the rat
    B Bjorvatn
    Department of Physiology, University of Bergen, Bergen, Norway
    Neuroscience 113:323-30. 2002

Collaborators

Detail Information

Publications90

  1. doi request reprint A self-help book is better than sleep hygiene advice for insomnia: a randomized controlled comparative study
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Scand J Psychol 52:580-5. 2011
    ..Sleep hygiene advice also improved sleep at follow-up, but increased sleep medication use. Thus, caution is warranted when sleep hygiene advice are given as a single treatment...
  2. pmc Sleep disturbances in an arctic population: the Tromsø Study
    Arne Fetveit
    Department of General Practice and Community Medicine, University of Oslo, PO Box 1130 Blindern, 0317 Oslo, Norway
    BMC Health Serv Res 8:117. 2008
    ....
  3. ncbi request reprint Prevalence, severity and risk factors of restless legs syndrome in the general adult population in two Scandinavian countries
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31 N 5018, Bergen, Norway
    Sleep Med 6:307-12. 2005
    ..To estimate prevalence and severity (using the International Restless Legs Syndrome Study Group Rating Scale (IRLS)) and to identify risk factors of restless legs syndrome (RLS)...
  4. ncbi request reprint Subjective and objective measures of adaptation and readaptation to night work on an oil rig in the North Sea
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Sleep 29:821-9. 2006
    ..To study the adaptation and readaptation processes to 1 week of night work (6:30 PM to 6:30 AM) followed by 1 week of day work (6:30 AM to 6:30 PM)...
  5. doi request reprint [Insomnia]
    Bjørn Bjorvatn
    Institutt for samfunnsmedisinske fag Universitetet i Bergen, Postboks 7804, 5020 Bergen og Nasjonalt kompetansesenter for søvnsykdommer, Haukeland Universitetssykehus, Bergen, Norway
    Tidsskr Nor Laegeforen 129:1766-8. 2009
    ..Insomnia is the most prevalent sleep disorder. Chronic insomnia affects about 10% of the adult population...
  6. ncbi request reprint The association between sleep duration, body mass index and metabolic measures in the Hordaland Health Study
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    J Sleep Res 16:66-76. 2007
    ..Furthermore, levels of total cholesterol, HDL-cholesterol, triglycerides and blood pressure were associated with sleep duration...
  7. ncbi request reprint Randomized placebo-controlled field study of the effects of bright light and melatonin in adaptation to night work
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, N 5018 Bergen, Norway
    Scand J Work Environ Health 33:204-14. 2007
    ..This study evaluated the effects of bright light and melatonin on adaptation to night work on an oil rig in the North Sea...
  8. ncbi request reprint [Periodic limb movements in sleep--can and should this condition be treated?]
    B Bjorvatn
    Bergen Søvnsenter Nattlandsveien 8, Seksjon for allmennmedisin Locus for nevrovitenskap Universitetet i Bergen
    Tidsskr Nor Laegeforen 121:2169-72. 2001
    ..Periodic limb movements in sleep (PLMS) may occur in up to 6% of the general population and is more common in the elderly...
  9. doi request reprint A practical approach to circadian rhythm sleep disorders
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, N 5018 Bergen, Norway
    Sleep Med Rev 13:47-60. 2009
    ..We hope this practical approach and simple recommendations will stimulate clinicians to treat patients with circadian rhythm sleep disorders...
  10. ncbi request reprint Effects of sleep deprivation on extracellular serotonin in hippocampus and frontal cortex of the rat
    B Bjorvatn
    Department of Physiology, University of Bergen, Bergen, Norway
    Neuroscience 113:323-30. 2002
    ..However, since 5-HT levels are strongly behavioral state dependent, by eliminating sleep, there may be a net increase in serotonergic neurotransmission during the sleep deprivation period...
  11. ncbi request reprint Bright light treatment used for adaptation to night work and re-adaptation back to day life. A field study at an oil platform in the North Sea
    B Bjorvatn
    Division for General Practice, University of Bergen, Norway
    J Sleep Res 8:105-12. 1999
    ..These results suggest that short-term bright light treatment may help the adaptation to an extended night-work period, and especially the subsequent re-adaptation to day life...
  12. ncbi request reprint [Parasomnias]
    Bjørn Bjorvatn
    Institutt for samfunnsmedisinske fag, Universitetet i Bergen, Postboks 7804, 5020 Bergen, Norway
    Tidsskr Nor Laegeforen 129:1892-4. 2009
    ..Parasomnias are undesirable experiences or motoric phenomena that occur in association with sleep. We have described characteristics of parasomnia subtypes...
  13. doi request reprint Prevalence of different parasomnias in the general population
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Sleep Med 11:1031-4. 2010
    ..In addition, to study the relationship between the different parasomnias and gender, depressive mood, and symptoms of sleep apnea, insomnia and restless legs, as well as estimating the prevalence of having multiple parasomnias...
  14. ncbi request reprint Extracellular levels of serotonin and GABA in the hippocampus after chronic mild stress in rats. A microdialysis study in an animal model of depression
    Janne Grønli
    Department of Biomedicine, Section on Physiology, University of Bergen, Jonas Lies vei 91, N 5009 Bergen, Norway
    Behav Brain Res 181:42-51. 2007
    ..The alteration in 5-HT function may represent a link between depression-like behaviour and sleep abnormalities found in depressed patients...
  15. ncbi request reprint Sleep and health in oil rig workers--before and after a two week work period offshore
    Siri Waage
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Ind Health 51:172-9. 2013
    ..However, there were few differences in changes in terms of sleep or subjective health complaints between day- and swing shift, suggesting that 12 h day shift affected sleep and health similarly to the schedule involving night work...
  16. doi request reprint A reliability and validity study of the Bergen Shift Work Sleep Questionnaire in nurses working three-shift rotations
    Elisabeth Flo
    Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway
    Chronobiol Int 29:937-46. 2012
    ..We conclude that the BSWSQ meets the necessary psychometric standards, enabling systematic study of discrete insomnia symptoms in different work shifts...
  17. pmc Sleep and sleep disorders in chronic users of zopiclone and drug-free insomniacs
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, Bergen, Norway
    J Clin Sleep Med 5:349-54. 2009
    ....
  18. ncbi request reprint A comparison of actigraphy and polysomnography in older adults treated for chronic primary insomnia
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, Christiesgt 12, Bergen, Norway
    Sleep 29:1353-8. 2006
    ..The present study explores the accuracy and clinical utility of actigraphy compared with polysomnography in older adults treated for chronic primary insomnia...
  19. pmc Insomnia, excessive sleepiness, excessive fatigue, anxiety, depression and shift work disorder in nurses having less than 11 hours in-between shifts
    Maria Fagerbakke Eldevik
    Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    PLoS ONE 8:e70882. 2013
    ..To assess if less than 11 hours off work between work shifts (quick returns) was related to insomnia, sleepiness, fatigue, anxiety, depression and shift work disorder among nurses...
  20. ncbi request reprint The long-term effect of insomnia on work disability: the HUNT-2 historical cohort study
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, and Affective Disorder Section, Department of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Am J Epidemiol 163:1018-24. 2006
    ..75, 95% confidence interval: 1.40, 2.20). This study suggests that insomnia should receive increased attention as a robust predictor of subsequent work disability...
  21. doi request reprint Insomnia, nightmare frequency, and nightmare distress in victims of sexual abuse: the role of perceived social support and abuse characteristics
    Iris M Steine
    University of Bergen, Bergen, Norway
    J Interpers Violence 27:1827-43. 2012
    ..Also, more severe forms of sexual abuse are related to higher levels of sleep difficulties...
  22. pmc Sleep and depression in postpartum women: a population-based study
    Signe Karen Dørheim
    Section for General Practice, Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    Sleep 32:847-55. 2009
    ....
  23. ncbi request reprint Factors associated with depressive symptoms among postnatal women in Nepal
    Signe Dørheim Ho-Yen
    Department of Public Health and Primary Health Care, Section for General Practice, University of Bergen, and Division of Psychiatry, Stavanger University Hospital, Norway
    Acta Obstet Gynecol Scand 86:291-7. 2007
    ..Depression after childbirth affects both the mother and her infant. In South-Asia, maternal depression might also contribute to poor infant growth. Knowledge of risk factors could improve the health workers' recognition of depression...
  24. doi request reprint Subjective and objective sleepiness among oil rig workers during three different shift schedules
    Siri Waage
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Sleep Med 13:64-72. 2012
    ..Examine sleepiness in three different shift work schedules (within-subject design) in the offshore oil industry...
  25. doi request reprint Personality factors related to shift work tolerance in two- and three-shift workers
    Sylvia Natvik
    Department of Psychosocial Science, University of Bergen, Christiesgt 12, Bergen, Norway
    Appl Ergon 42:719-24. 2011
    ..Languidity was associated with higher levels of sleepiness, depressive and anxiety symptoms. Hardiness was associated with lower levels of all four dependent variables...
  26. doi request reprint Patient characteristics and predictors of sleep medication use
    Siri Omvik
    Department of Clinical Psychology, University of Bergen, Bergen, Norway
    Int Clin Psychopharmacol 25:91-100. 2010
    ..Nonpharmacological treatment is to a small extent implemented in the health care sector...
  27. ncbi request reprint Daytime functioning in older patients suffering from chronic insomnia: treatment outcome in a randomized controlled trial comparing CBT with Zopiclone
    Siri Omvik
    Department of Clinical Psychology, University of Bergen, Bergen, Norway
    Behav Res Ther 46:623-41. 2008
    ..It was concluded that the treatments yielded only minor effects on the measures of daytime functioning, and that none of them was clearly superior to the other...
  28. pmc Shift work disorder among oil rig workers in the North Sea
    Siri Waage
    Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    Sleep 32:558-65. 2009
    ..The main symptoms are excessive sleepiness and insomnia temporally associated with the working schedule. The aim of the present study was to examine SWD among shift workers in the North Sea...
  29. ncbi request reprint [Symptom patterns in chronic sleep disorders]
    Nicolas Øyane
    Institutt for samfunnsmedisinske fag, Universitetet i Bergen og Nasjonalt kompetansesenter for søvnsykdommer, Haukeland Universitetssykehus, 5021 Bergen og Bergen Søvnsenter, Norway
    Tidsskr Nor Laegeforen 129:2011-4. 2009
    ..The aim of this article is to shed light on differences between these categories with respect to symptom patterns...
  30. ncbi request reprint Still healthy after extended work hours? Ten hours shift, twenty-one days working period for tunnel workers
    Siri Waage
    Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    Ind Health 48:804-10. 2010
    ..No association between this type of long work hours and changes in self-reported health was found in this study. However, this might have been a selected group of workers, and the same results may not be found in another population...
  31. doi request reprint Objective measures of sleep and dim light melatonin onset in adolescents and young adults with delayed sleep phase disorder compared to healthy controls
    Ingvild W Saxvig
    Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    J Sleep Res 22:365-72. 2013
    ..The sleep period appeared to occur at the same circadian phase in both groups, and once sleep was initiated no differences in sleep parameters were observed. ..
  32. doi request reprint Self-reported sleep and health among Norwegian hospital nurses in intensive care units
    Bjørn Bjorvatn
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Nurs Crit Care 17:180-8. 2012
    ..Shift work, and especially night work, is associated with poor health. Nurses, work a variety of work schedules including night work. So far, few studies have specifically investigated sleep and health among intensive care nurses...
  33. doi request reprint Prevalence and correlates of delayed sleep phase in high school students
    Ingvild W Saxvig
    Department of Public Health and Primary Health Care, University of Bergen, Postboks 7804, 5020 Bergen, Norway
    Sleep Med 13:193-9. 2012
    ..To investigate prevalence and correlates of delayed sleep phase, characterized by problems falling asleep in the evening and rising at adequate times in the morning, in a large sample of Norwegian high school students...
  34. ncbi request reprint Effects of chronic mild stress on sexual behavior, locomotor activity and consumption of sucrose and saccharine solutions
    Janne Grønli
    Department of Biomedicine, Section of Physiology, University of Bergen, Jonas Lies vei 91, N 5009 Bergen, Norway
    Physiol Behav 84:571-7. 2005
    ..It is concluded that CMS induces comparable alterations to some depression-like symptoms in humans. Saccharine consumption is not a reliable indicator of the hedonic responsiveness to CMS...
  35. ncbi request reprint Shift work and age in petroleum offshore industry
    Siri Waage
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Int Marit Health 62:251-7. 2010
    ..The aim of the study was to examine the relationship between age, shift work exposure, shift type, and morningness and sleep/health problems in oil rig shift workers...
  36. doi request reprint Brief report: behaviorally induced insufficient sleep syndrome in older adolescents: prevalence and correlates
    Stale Pallesen
    Department of Psychosocial Science, Faculty of Psychology, University of Bergen, Christiesgt 12, 5015 Bergen, Norway
    J Adolesc 34:391-5. 2011
    ..BIISS was associated with poor grades and symptoms of anxiety and depression...
  37. doi request reprint Does insomnia predict sick leave? The Hordaland Health Study
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, Bergen, Norway
    J Psychosom Res 66:67-74. 2009
    ..The purpose of this study is to prospectively examine the independent contribution of symptoms of insomnia on sick leave...
  38. ncbi request reprint Chronic mild stress inhibits BDNF protein expression and CREB activation in the dentate gyrus but not in the hippocampus proper
    Janne Grønli
    Department of Biomedicine, Section on Physiology, University of Bergen, Jonas Lies vei 91, N 5009 Bergen, Norway
    Pharmacol Biochem Behav 85:842-9. 2006
    ....
  39. pmc Increased health risk in subjects with high self-reported seasonality
    Nicolas M Øyane
    Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    PLoS ONE 5:e9498. 2010
    ..As a part of a large cross-sectional health survey in Hordaland, Norway, we investigated the relationship between seasonality, objective health measurements and health behaviours...
  40. doi request reprint A randomized controlled trial with bright light and melatonin for the treatment of delayed sleep phase disorder: effects on subjective and objective sleepiness and cognitive function
    Ane Wilhelmsen-Langeland
    Department of Global Health and Primary Care, University of Bergen, Bergen, Norway
    J Biol Rhythms 28:306-21. 2013
    ..However, the benefits from gradually advanced rise times seem to wear off, suggesting that the continuation of bright light and melatonin treatment is beneficial to maintain positive effects over time. ..
  41. pmc Shift work disorder in nurses--assessment, prevalence and related health problems
    Elisabeth Flo
    Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway
    PLoS ONE 7:e33981. 2012
    ..This study investigates the prevalence of symptoms of shift work disorder in a sample of nurses, and its association to individual, health and work variables...
  42. ncbi request reprint Cognitive behavioral therapy vs zopiclone for treatment of chronic primary insomnia in older adults: a randomized controlled trial
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, Bergen, Norway
    JAMA 295:2851-8. 2006
    ..Previous research has suggested beneficial outcomes of both psychological and pharmacological treatments, but blinded placebo-controlled trials comparing the effects of these treatments are lacking...
  43. ncbi request reprint Sleep duration, subjective sleep need, and sleep habits of 40- to 45-year-olds in the Hordaland Health Study
    Reidun Ursin
    Section for Physiology, Department of Biomedicine, University of Bergen, Norway
    Sleep 28:1260-9. 2005
    ..To report the distribution of various sleep parameters in a population-based study...
  44. ncbi request reprint Insomnia and long sleep duration are risk factors for later work disability. The Hordaland Health Study
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, Bergen, Norway
    J Sleep Res 18:122-8. 2009
    ..5 h) did predict work disability (OR = 2.96), also in the fully adjusted model (OR = 2.14).The present study demonstrates that both insomnia and long sleep duration are strong and independent risk factors for subsequent work disability...
  45. doi request reprint Sleep problems in general practice: a national survey of assessment and treatment routines of general practitioners in Norway
    Børge Sivertsen
    Department of Clinical Psychology, University of Bergen, Norway
    J Sleep Res 19:36-41. 2010
    ....
  46. ncbi request reprint Prevalence and risk factors of subjective sleepiness in the general adult population
    Stale Pallesen
    Department of Psychosocial Science, University of Bergen, Norway
    Sleep 30:619-24. 2007
    ..The aim of this study was to investigate the prevalence and risk factors of self-reported excessive daytime sleepiness (EDS) in Norway...
  47. ncbi request reprint The effect of GABA(A) antagonist bicuculline on dorsal raphe nucleus and frontal cortex extracellular serotonin: a window on SWS and REM sleep modulation
    Eldbjørg Fiske
    Department of Biomedicine, Section of Physiology, University of Bergen, Jonas Lies vei 91, N 5009 Bergen, Norway
    Pharmacol Biochem Behav 83:314-21. 2006
    ....
  48. pmc Early and later life stress alter brain activity and sleep in rats
    Jelena Mrdalj
    Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
    PLoS ONE 8:e69923. 2013
    ..Chronic stress affected similarly other sleep parameters and flattened the sleep homeostasis curves in all offspring. The results confirm that early environmental conditions modulate the brain functioning in a long-lasting way. ..
  49. ncbi request reprint Sleep disturbances among nursing home residents
    Arne Fetveit
    Department of Public Health and Primary Health Care, Section for General Practice, University of Bergen, Norway
    Int J Geriatr Psychiatry 17:604-9. 2002
    ..This study assesses the prevalence and characteristics of sleep disturbances among an entire nursing home population, consisting of 29, mainly demented, long-term patients...
  50. ncbi request reprint Bright light treatment improves sleep in institutionalised elderly--an open trial
    Arne Fetveit
    Department of Public Health and Primary Health Care, Section for General Practice, University of Bergen, Norway
    Int J Geriatr Psychiatry 18:520-6. 2003
    ..This study evaluates the effects of bright light therapy among demented nursing home patients with sleep disturbances...
  51. doi request reprint The joint contribution of insomnia and obstructive sleep apnoea on sickness absence
    Børge Sivertsen
    Department of Public Mental Health, Division of Mental Health, Norwegian Institute of Public Health, Bergen, Norway
    J Sleep Res 22:223-30. 2013
    ..Having both insomnia and obstructive sleep apnoea increased the risk of later sick leave, but there was no evidence of an independent synergy effect of the two conditions...
  52. doi request reprint Individual, situational and lifestyle factors related to shift work tolerance among nurses who are new to and experienced in night work
    Ingvild Saksvik-Lehouillier
    Department of Psychosocial Science, University of Bergen, Norway
    J Adv Nurs 69:1136-46. 2013
    ....
  53. pmc Poor sleep in patients with multiple sclerosis
    Hanne Marie Bøe Lunde
    The Norwegian Multiple Sclerosis Competence Centre, Department of Neurology, Haukeland University Hospital, Bergen, Norway
    PLoS ONE 7:e49996. 2012
    ..We aimed to study the prevalence of poor sleep and the influence of socio-demographic and clinical factors on sleep quality in MS- patients...
  54. doi request reprint The relationship between media use in the bedroom, sleep habits and symptoms of insomnia
    Geir Scott Brunborg
    Department of Psychosocial Science, University of Bergen, Norway
    J Sleep Res 20:569-75. 2011
    ..This study indicates that the use of computers and mobile telephones in the bedroom are related to poor sleep habits, but that media use in the bedroom seems to be unrelated to symptoms of insomnia...
  55. ncbi request reprint Measures to counteract the negative effects of night work
    Stale Pallesen
    Department of Psychosocial Science, University of Bergen, 5015 Bergen, Norway
    Scand J Work Environ Health 36:109-20. 2010
    ..Night work is associated with several negative health outcomes as well as accidents and reduced productivity. The aim of this study was to identify factors that may counteract the negative effects of night work...
  56. doi request reprint The relationship between school day sleep duration and body mass index in Norwegian children (aged 10-12)
    Yngvild S Danielsen
    University of Bergen, Faculty of Psychology, Christiesgt 12, P O Box 7800, 5020 Bergen, Norway
    Int J Pediatr Obes 5:214-20. 2010
    ..To examine the relationship between sleep duration and body mass index (BMI) in Norwegian children (aged 10-12)...
  57. doi request reprint Cortisol, reaction time test and health among offshore shift workers
    Anette Harris
    Research Center for Health Promotion, Faculty of Psychology, University of Bergen, Bergen, Norway
    Psychoneuroendocrinology 35:1339-47. 2010
    ..Shift work and especially night work disrupts the sleep/wake cycle and causes a desynchronization of the natural biological rhythms. Therefore, different shift schedules may have different impact on performance at work and health...
  58. ncbi request reprint The effect of a REM sleep deprivation procedure on different aspects of memory function in humans
    Ingvild West Saxvig
    Department of Biomedicine, Section of Physiology, University of Bergen, Bergen, Norway
    Psychophysiology 45:309-17. 2008
    ..Results show that test performance was not affected by REM sleep deprivation...
  59. doi request reprint Adaptation and readaptation to different shift work schedules measured with sleep diary and actigraphy
    Ingvild Berg Saksvik
    Department of Psychosocial Science, University of Bergen, Bergen, Norway
    J Occup Health Psychol 16:331-44. 2011
    ..Readaptation to day work after 1 week of night work affected sleep negatively. There were no differences between the shift schedules the week after the work period...
  60. ncbi request reprint Effect of antipsychotic withdrawal on behavior and sleep/wake activity in nursing home residents with dementia: a randomized, placebo-controlled, double-blinded study. The Bergen District Nursing Home Study
    Sabine Ruths
    Section for Geriatric Medicine, Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
    J Am Geriatr Soc 52:1737-43. 2004
    ..To explore the effect on sleep/wake activity and on behavioral and psychological symptoms of the withdrawal of antipsychotic medications from nursing home (NH) patients with dementia...
  61. ncbi request reprint Seasonality is associated with anxiety and depression: the Hordaland health study
    Nicolas M F Oyane
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    J Affect Disord 105:147-55. 2008
    ....
  62. doi request reprint Sleep disturbances in sexual abuse victims: a systematic review
    Iris M Steine
    Department of Psychosocial Science, University of Bergen, Christiesgate 12, 5015 Bergen, Norway
    Sleep Med Rev 16:15-25. 2012
    ....
  63. ncbi request reprint Bright-light treatment reduces actigraphic-measured daytime sleep in nursing home patients with dementia: a pilot study
    Arne Fetveit
    Dept of Public Health and Primary Health Care, Section for General Practice, University of Bergen, Kalfarveien 31, 5018 Bergen, Norway
    Am J Geriatr Psychiatry 13:420-3. 2005
    ..The authors evaluated the effects of bright-light therapy on daytime sleep among nursing home patients with dementia...
  64. doi request reprint Individual differences in tolerance to shift work--a systematic review
    Ingvild B Saksvik
    Department of Psychosocial Science, University of Bergen, Christies gate 12, 5015 Bergen, Norway
    Sleep Med Rev 15:221-35. 2011
    ..More longitudinal studies, especially concerning personality, are needed to make conclusions about the predictive power of individual differences for shift work tolerance...
  65. doi request reprint Subjective and objective sleep and sleepiness among tunnel workers in an extreme and isolated environment: 10-h shifts, 21-day working period, at 78 degrees north
    Knut Forberg
    Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, N 5018 Bergen, Norway
    Sleep Med 11:185-90. 2010
    ..We wanted to examine whether sleep duration, sleepiness and other parameters changed over the 3-week working period and whether the parameters differed between day and night shifts...
  66. ncbi request reprint Night-time thoughts in high and low worriers: reaction to caffeine-induced sleeplessness
    Siri Omvik
    Department of Clinical Psychology, University of Bergen, Christies gate 12, 5015 Bergen, Norway
    Behav Res Ther 45:715-27. 2007
    ..The results suggest that worry may occur as an epiphenomenon of sleeplessness...
  67. ncbi request reprint The effects of bright-light therapy on actigraphical measured sleep last for several weeks post-treatment. A study in a nursing home population
    Arne Fetveit
    Department of Public Health and Primary Health Care, Section for General Practice, University of Bergen, Norway
    J Sleep Res 13:153-8. 2004
    ..Furthermore, these results are the first to suggest that post-treatment effects of short-term bright-light therapy may last longer than previously assumed...
  68. ncbi request reprint Improvement in behavioral symptoms and advance of activity acrophase after short-term bright light treatment in severe dementia
    Arvid Skjerve
    Olaviken Treatment Center, University of Bergen, Bergen, Norway
    Psychiatry Clin Neurosci 58:343-7. 2004
    ..There was an advance of the activity rhythm acrophase during treatment. These results suggest that short-time bright light improves behavioral symptoms and aspects of activity rhythm disturbances even in severely demented subjects...
  69. ncbi request reprint Light therapy for behavioural and psychological symptoms of dementia
    Arvid Skjerve
    Department of Clinical Psychology, University of Bergen, Norway
    Int J Geriatr Psychiatry 19:516-22. 2004
    ..To review literature concerning the efficacy, clinical practicability and safety of light treatment for behavioural and psychological symptoms of dementia (BPSD)...
  70. ncbi request reprint Chronic mild stress affects sucrose intake and sleep in rats
    Janne Grønli
    Section on Physiology, University of Bergen, Jonas Lies vei 91, N 5009 Bergen, Norway
    Behav Brain Res 150:139-47. 2004
    ..Correlation analysis showed that animals that had less consumption of sucrose spent more time in REM sleep and had increased number of REM sleep episodes. In this study, CMS appears to be a model of depression...
  71. ncbi request reprint [Earth rays--a concept with no scientific basis]
    Anders Baerheim
    Seksjon for allmennmedisin, Institutt for samfunnsmedisinske fag, Universitetet i Bergen, Kalfarveien 31, 5018 Bergen
    Tidsskr Nor Laegeforen 126:3264-6. 2006
    ..We advocate prudence in taking success stories, whether published or from one's own clinical experience, as proof of any treatment's effectiveness before having it confirmed by research...
  72. ncbi request reprint Sleep and waking following microdialysis perfusion of the selective 5-HT1A receptor antagonist p-MPPI into the dorsal raphe nucleus in the freely moving rat
    E Sørensen
    Department of Physiology, University of Bergen, Arstadveien 19, N 5009, Bergen, Norway
    Brain Res 897:122-30. 2001
    ..There was no change in waking or slow wave sleep (SWS) following any of the doses. The data suggest that 5-HT1A receptor-mediated mechanisms in the DRN may be only moderately important in the serotonergic modulation of REM sleep...
  73. ncbi request reprint Venlafaxine and its interaction with WAY 100635: effects on serotonergic unit activity and behavior in cats
    B Bjorvatn
    Program in Neuroscience, Department of Psychology, Princeton University, Princeton, NJ, USA
    Eur J Pharmacol 404:121-32. 2000
    ..Possible mechanisms that might account for these differences in drug interaction are discussed...
  74. ncbi request reprint Sleep-wake effects following the selective 5-HT(1A) receptor antagonist p-MPPI in the freely moving rat
    E Sørensen
    Department of Physiology, University of Bergen, Arstadveien 19, N 5009, Bergen, Norway
    Behav Brain Res 114:31-8. 2000
    ....
  75. ncbi request reprint Increased extracellular 5-HT but no change in sleep after perfusion of a 5-HT1A antagonist into the dorsal raphe nucleus of rats
    E Fiske
    Department of Biomedicine, University of Bergen, Bergen, Norway
    Acta Physiol (Oxf) 193:89-97. 2008
    ....
  76. ncbi request reprint Tx-discs--no effect against subjective health complaints: a randomised controlled study
    A Baerheim
    Section for General Practice, Department for Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, 5018 Bergen, Norway
    Complement Ther Med 13:239-43. 2005
    ..Dowsers claim unhealthy effects of 'earth rays', and the producer of TX-discs claims that these discs may shield a person from the influence of 'earth rays', thereby relieving most illness in the person shielded...
  77. ncbi request reprint Seasonal variations in mood and behaviour associated with gender, annual income and education: the Hordaland Health Study
    Nicolas M F Øyane
    Department of Public Health and Primary Health Care, University of Bergen, Norway
    Eur J Epidemiol 20:929-37. 2005
    ..To explore the relationship between demographic factors and seasonal changes in mood and behaviour...
  78. ncbi request reprint The selective 5-HT(1A) receptor antagonist p-MPPI antagonizes sleep--waking and behavioural effects of 8-OH-DPAT in rats
    E Sørensen
    Department of Physiology, University of Bergen, Arstadveien 19, N 5009 Bergen, Norway
    Behav Brain Res 121:181-7. 2001
    ..No overt behavioural change was produced by p-MPPI alone. Thus, p-MPPI behaved as a true 5-HT(1A) antagonist...
  79. ncbi request reprint The prevalence of depressive symptoms in the postnatal period in Lalitpur district, Nepal
    Signe Dørheim Ho-Yen
    Section for General Practice, Department of Public Health and Primary Health Care, University of Bergen, Norway
    Acta Obstet Gynecol Scand 85:1186-92. 2006
    ..The emotional, cognitive, and physical development of the infant is also negatively influenced by maternal depression...
  80. ncbi request reprint Effects of zimeldine, a selective 5-HT reuptake inhibitor, combined with ritanserin, a selective 5-HT2 antagonist, on waking and sleep stages in rats
    B Bjorvatn
    Department of Physiology, University of Bergen, Norway
    Behav Brain Res 40:239-46. 1990
    ..This suggests that the increase in SWS-2 seen after 5-HT reuptake inhibition and 5-HT2 blockade are independent phenomena. Zimeldine alone, ritanserin alone and the combination all gave a clear reduction of rapid eye movement sleep...
  81. ncbi request reprint Sleep/waking and EEG power spectrum effects of a nonselective serotonin (5-HT) antagonist and a selective 5-HT reuptake inhibitor given alone and in combination
    B Bjorvatn
    Department of Physiology, University of Bergen, Norway
    Sleep 18:451-62. 1995
    ..The other zimeldine effects were not consistently antagonized, thus the mechanisms behind these effects remain unclear...
  82. ncbi request reprint Citalopram: differential sleep/wake and EEG power spectrum effects after single dose and chronic administration
    D Neckelmann
    Department of Physiology, University of Bergen, Norway
    Behav Brain Res 79:183-92. 1996
    ..The data indicate that acute and chronic administration of citalopram shows clear differences in sleep effect, which may be caused by alteration of serotonergic transmission, and may be related to the antidepressant effect...
  83. ncbi request reprint Sleep/waking effects of a selective 5-HT1A receptor agonist given systemically as well as perfused in the dorsal raphe nucleus in rats
    B Bjorvatn
    Department of Physiology, University of Bergen, Norway
    Brain Res 770:81-8. 1997
    ..The other sleep/waking stages were not significantly affected by 8-OH-DPAT perfusion in DRN...
  84. ncbi request reprint EEG power densities (0.5-20 Hz) in different sleep-wake stages in rats
    B Bjorvatn
    Department of Physiology, University of Bergen, Norway
    Physiol Behav 63:413-7. 1998
    ..This is in parallel with other rat studies but contrasts findings in humans, where EEG sigma activity is reported to decrease as sleep deepens. During the 8-h recording period, delta activity decreased whereas sigma activity increased...
  85. doi request reprint Subjective and objective sleep among depressed and non-depressed postnatal women
    S K Dørheim
    Department of Public Health and Primary Health Care, Section for General Practice, University of Bergen, Bergen, Norway
    Acta Psychiatr Scand 119:128-36. 2009
    ..Women sleep less in the postnatal period and it has been suggested that mothers diagnosed with depression alternatively could be suffering from the effects of chronic sleep deprivation...
  86. doi request reprint The effect of OSAS on sick leave and work disability
    B Sivertsen
    Dept of Clinical Psychology, University of Bergen, Christiesgt 12, 5015 Bergen, Norway
    Eur Respir J 32:1497-503. 2008
    ..These findings need to be replicated using objective measures of obstructive sleep apnoea syndrome...
  87. ncbi request reprint Lesion of descending 5-HT pathways increases zimeldine-induced waking in rats
    A A Bjørkum
    Department of Physiology, University of Bergen, Norway
    Physiol Behav 57:959-66. 1995
    ..In sleep, zimeldine reduced power over the whole spectrum (0.5-20.0 Hz), less in the lower frequencies than in the higher frequencies...
  88. ncbi request reprint The 5-HT1A antagonist (-)-alprenolol fails to modify sleep or zimeldine-induced sleep-waking effects in rats
    B Bjorvatn
    Department of Physiology, University of Bergen, Norway
    Pharmacol Biochem Behav 42:49-56. 1992
    ..The data indicate that the sleep-waking effects of zimeldine cannot easily be explained by stimulation of 5-HT1A receptors...
  89. ncbi request reprint Increased waking as well as increased synchronization following administration of selective 5-HT uptake inhibitors to rats
    R Ursin
    Department of Physiology, University of Bergen, Norway
    Behav Brain Res 34:117-30. 1989
    ..None of the drugs increased waking any further, but the PCPA-pretreated animals that received zimeldine had increased SWS-2, indicating that the SWS-2 increase following zimeldine alone was not a rebound effect...
  90. ncbi request reprint Sleep-wake and eeg effects following adenosine a1 agonism and antagonism: similarities and interactions with sleep-wake and eeg effects following a serotonin reuptake inhibitor in rats
    R Ursin
    Department of Physiology, University of Bergen, Bergen N 5009, Norway
    Sleep Res Online 1:119-27. 1998
    ..The data indicate that the delayed SWS-2 and slow wave activity increases following zimeldine are not due to increased stimulation of adenosine A1 receptors following the initial sleep loss...