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Paquet C, Lenker KP, Calhoun SL, Bixler EO, Vgontzas AN, Fernandez-Mendoza J. Short-term stability and night-to-night variability of sleep parameters in nightmares comorbid with chronic insomnia Disorder across multiple nights of polysomnography. Sleep 2024; 47:zsae032. [PMID: 38300896 DOI: 10.1093/sleep/zsae032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/07/2024] [Indexed: 02/03/2024] Open
Abstract
STUDY OBJECTIVES The purpose of this study was to examine the degree of short-term stability of polysomnographic (PSG) measured sleep parameters and the overall differences between individuals with comorbid nightmares and insomnia compared to those with chronic insomnia disorder alone or good sleeping controls across four nights in the sleep lab. METHODS A total of 142 good sleeping controls, 126 chronic insomnia alone, and 24 comorbid insomnia/nightmare participants underwent four consecutive nights of 8-hour PSG recordings. Outcomes included sleep continuity, architecture, and REM-related parameters across nights one through four. Intraclass correlation coefficients with mixed-effect variances and repeated-measure analysis of covariance were used, respectively, to determine short-term stability as well as between-participants and time-by-group interaction effects. RESULTS Wake after sleep onset and stage 1 showed "poor stability" in the comorbid insomnia/nightmare group compared to "moderate stability" in the good sleeping controls and chronic insomnia alone group. Significant between-group effects (all ps < .05) showed that the comorbid insomnia/nightmare group took longer to fall asleep and had a greater first-night-effect in stage 1 compared to good sleeping controls and chronic insomnia alone group; in addition, the comorbid insomnia/nightmare and insomnia alone groups slept shorter, with fewer awakenings and REM periods, compared to the good sleeping controls. CONCLUSIONS Nightmares are associated with abnormal sleep above and beyond REM disruption, as sleep continuity was the primary aspect in which poor stability and group differences emerged. The greater inability to fall asleep and instability of sleep fragmentation in those with comorbid insomnia/nightmares compared to chronic insomnia alone may be attributed to the impact of presleep anticipatory anxiety and nightmare-related distress itself. CLINICAL TRIAL INFORMATION The data analyzed in this study does not come from any current or previous clinical trials. Therefore, there is no clinical trial information to report.
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Affiliation(s)
- Caitlin Paquet
- Department of Psychiatry and Behavioral Health, Sleep Research and Treatment Center, Penn State College of Medicine, Hershey, PA, USA
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Kristina P Lenker
- Department of Psychiatry and Behavioral Health, Sleep Research and Treatment Center, Penn State College of Medicine, Hershey, PA, USA
| | - Susan L Calhoun
- Department of Psychiatry and Behavioral Health, Sleep Research and Treatment Center, Penn State College of Medicine, Hershey, PA, USA
| | - Edward O Bixler
- Department of Psychiatry and Behavioral Health, Sleep Research and Treatment Center, Penn State College of Medicine, Hershey, PA, USA
| | - Alexandros N Vgontzas
- Department of Psychiatry and Behavioral Health, Sleep Research and Treatment Center, Penn State College of Medicine, Hershey, PA, USA
| | - Julio Fernandez-Mendoza
- Department of Psychiatry and Behavioral Health, Sleep Research and Treatment Center, Penn State College of Medicine, Hershey, PA, USA
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2
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Strassberger C, Hedner J, Sands SA, Tolbert TM, Taranto-Montemurro L, Marciniak A, Zou D, Grote L. Night-to-Night Variability of Polysomnography-Derived Physiologic Endotypic Traits in Patients With Moderate to Severe OSA. Chest 2023; 163:1266-1278. [PMID: 36610664 PMCID: PMC10206510 DOI: 10.1016/j.chest.2022.12.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 11/29/2022] [Accepted: 12/14/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Emerging data suggest that determination of physiologic endotypic traits (eg, loop gain) may enable precision medicine in OSA. RESEARCH QUESTION Does a single-night assessment of polysomnography-derived endotypic traits provide reliable estimates in moderate to severe OSA? STUDY DESIGN AND METHODS Two consecutive in-lab polysomnography tests from a clinical trial (n = 67; male, 69%; mean ± SD age, 61 ± 10 years; apnea-hypopnea index [AHI] 53 ± 22 events/h) were used for the reliability analysis. Endotypic traits, reflecting upper airway collapsibility (ventilation at eupneic drive [Vpassive]), upper airway dilator muscle tone (ventilation at the arousal threshold [Vactive]), loop gain (stability of ventilatory control, LG1), and arousal threshold (ArTh) were determined. Reliability was expressed as an intraclass correlation coefficient (ICC). Minimal detectable differences (MDDs) were computed to provide an estimate of maximum spontaneous variability. Further assessment across four repeated polysomnography tests was performed in a subcohort (n = 22). RESULTS Reliability of endotypic traits between the two consecutive nights was moderate to good (ICC: Vpassive = 0.82, Vactive = 0.76, LG1 = 0.72, ArTh = 0.83). Variability in AHI, but not in body position or in sleep stages, was associated with fluctuations in Vpassive and Vactive (r = -0.49 and r = -0.41, respectively; P < .001 for both). MDDs for single-night assessments were: Vpassive = 22, Vactive = 34, LG1 = 0.17, and ArTh = 21. Multiple assessments (mean of two nights, n = 22) further reduced MDDs by approximately 20% to 30%. INTERPRETATION Endotypic trait analysis using a single standard polysomnography shows acceptable reliability and reproducibility in patients with moderate to severe OSA. The reported MDDs of endotypic traits may facilitate the quantification of relevant changes and may guide future evaluation of interventions in OSA.
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Affiliation(s)
- Christian Strassberger
- Center for Sleep and Vigilance Disorders, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | - Jan Hedner
- Center for Sleep and Vigilance Disorders, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Center for Sleep Medicine, Department of Respiratory Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Scott A Sands
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Thomas M Tolbert
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Luigi Taranto-Montemurro
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Albert Marciniak
- Center for Sleep and Vigilance Disorders, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Ding Zou
- Center for Sleep and Vigilance Disorders, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Ludger Grote
- Center for Sleep and Vigilance Disorders, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Center for Sleep Medicine, Department of Respiratory Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
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Maksoud R, Eaton-Fitch N, Matula M, Cabanas H, Staines D, Marshall-Gradisnik S. Systematic Review of Sleep Characteristics in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome. Healthcare (Basel) 2021; 9:healthcare9050568. [PMID: 34065013 PMCID: PMC8150292 DOI: 10.3390/healthcare9050568] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/01/2021] [Accepted: 05/07/2021] [Indexed: 02/04/2023] Open
Abstract
(1) Background—Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a multifaceted illness characterized by profound and persistent fatigue unrelieved by rest along with a range of other debilitating symptoms. Experiences of unrefreshing and disturbed sleep are frequently described by ME/CFS patients. This is the first systematic review assessing sleep characteristics in ME/CFS. The aim of this review is to determine whether there are clinical characteristics of sleep in ME/CFS patients compared to healthy controls using objective measures such as polysomnography and multiple sleep latency testing. (2) Methods—the following databases—Pubmed, Embase, Medline (EBSCO host) and Web of Science, were systematically searched for journal articles published between January 1994 to 19 February 2021. Articles that referred to polysomnography or multiple sleep latency testing and ME/CFS patients were selected, and further refined through use of specific inclusion and exclusion criteria. Quality and bias were measured using the Joanna Briggs Institute checklist. (3) Results—twenty observational studies were included in this review. The studies investigated objective measures of sleep quality in ME/CFS. Subjective measures including perceived sleep quality and other quality of life factors were also described. (4) Conclusions—Many of the parameters measured including slow- wave sleep, apnea- hypopnea index, spectral activity and multiple sleep latency testing were inconsistent across the studies. The available research on sleep quality in ME/CFS was also limited by recruitment decisions, confounding factors, small sample sizes and non-replicated findings. Future well-designed studies are required to understand sleep quality in ME/CFS patients.
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Affiliation(s)
- Rebekah Maksoud
- National Centre for Neuroimmunology and Emerging Diseases (NCNED), Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia; (N.E.-F.); (M.M.); (H.C.); (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Griffith University, Gold Coast 4222, Australia
- Correspondence:
| | - Natalie Eaton-Fitch
- National Centre for Neuroimmunology and Emerging Diseases (NCNED), Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia; (N.E.-F.); (M.M.); (H.C.); (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Griffith University, Gold Coast 4222, Australia
- School of Medical Science, Griffith University, Gold Coast 4222, Australia
| | - Michael Matula
- National Centre for Neuroimmunology and Emerging Diseases (NCNED), Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia; (N.E.-F.); (M.M.); (H.C.); (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Griffith University, Gold Coast 4222, Australia
| | - Hélène Cabanas
- National Centre for Neuroimmunology and Emerging Diseases (NCNED), Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia; (N.E.-F.); (M.M.); (H.C.); (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Griffith University, Gold Coast 4222, Australia
| | - Donald Staines
- National Centre for Neuroimmunology and Emerging Diseases (NCNED), Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia; (N.E.-F.); (M.M.); (H.C.); (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Griffith University, Gold Coast 4222, Australia
| | - Sonya Marshall-Gradisnik
- National Centre for Neuroimmunology and Emerging Diseases (NCNED), Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia; (N.E.-F.); (M.M.); (H.C.); (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Griffith University, Gold Coast 4222, Australia
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Zhang X, Zhang N, Yang Y, Wang S, Yu P, Guan BY, Wang CX. Characteristics of Obstructive Sleep Apnea Patients With Hypertension and Factors Associated With Autotitration Acceptance. Front Psychiatry 2021; 12:706275. [PMID: 35058810 PMCID: PMC8764373 DOI: 10.3389/fpsyt.2021.706275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 11/29/2021] [Indexed: 12/01/2022] Open
Abstract
In order to explore the characteristics and treatment status of obstructive sleep apnea (OSA) patients with hypertension, a retrospective study was conducted on 306 patients admitted from October 2018 to December 2019. According to the apnea hypopnea index (AHI), OSA patients with hypertension were divided into three groups. 69 cases were mild OSA (5 ≤ AHI < 15), 86 cases were moderate (15 ≤ AHI < 30), and 151 cases were severe (AHI ≥ 30). Compared with patients in the mild and moderate groups, the severe group had more male patients, with higher body mass index (BMI) and non-rapid eye movement stage 1 accounted for total sleep time (N1%), and lower non-rapid eye movement stage 2 accounted for total sleep time (N2%), average and minimum blood oxygen. Among all the patients, those who underwent the titration test accounted for 20.6% (63/306). Multivariate analysis showed that sleep efficiency (p < 0.001) and AHI (p < 0.001) were independent factors for patients to accept titration test. OSA patients with hypertension had a low acceptance of titration therapy. These people with higher sleep efficiency and AHI were more likely to receive autotitration.
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Affiliation(s)
- Xuan Zhang
- Department of Neurology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Ning Zhang
- Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China.,Department of Clinical Psychology, Capital Medical University, Beijing, China
| | - Yang Yang
- Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Shuo Wang
- Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Ping Yu
- Department of Neurology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Bo-Yuan Guan
- Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Chun-Xue Wang
- Department of Neuropsychiatry and Behavioral Neurology and Clinical Psychology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China.,Department of Clinical Psychology, Capital Medical University, Beijing, China.,Beijing Institute of Brain Disorders, Beijing, China
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Roeder M, Bradicich M, Schwarz EI, Thiel S, Gaisl T, Held U, Kohler M. Night-to-night variability of respiratory events in obstructive sleep apnoea: a systematic review and meta-analysis. Thorax 2020; 75:1095-1102. [DOI: 10.1136/thoraxjnl-2020-214544] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 06/24/2020] [Accepted: 07/06/2020] [Indexed: 12/20/2022]
Abstract
BackgroundIt is current practice to use a single diagnostic sleep study in the diagnostic workup of obstructive sleep apnoea (OSA). However, a relevant night-to-night variability (NtNV) of respiratory events has been reported.MethodsWe evaluated the NtNV of respiratory events in adults with suspected or already diagnosed OSA who underwent more than one diagnostic sleep study. Data sources were PubMed, Cochrane and Embase up to 23 January 2019. Random-effects models were used for evidence synthesis. For moderator analysis, mixed-effects regression analysis was performed. The study was registered with PROSPERO (CRD42019135277).ResultsOf 2143 identified papers, 24 studies, comprising 3250 participants, were included. The mean Apnoea-Hypopnoea Index (AHI) difference between the first and second night was −1.70/hour (95% CI −3.61 to 0.02). REM time differences (first to second night) were significantly positive associated with differences in mean AHI (β coefficient 0.262 (95% CI 0.096 to 0.428). On average, 41% (95% CI 27% to 57%) of all participants showed changes of respiratory events >10/hour from night to night. Furthermore, 49% (95% CI 32% to 65%) of participants changed OSA severity class (severity thresholds at 5/hour, 15/hour and 30/hour) at least once in sequential sleep studies. Depending on the diagnostic threshold (5/hour, 10/hour or 15/hour), on average 12% (95% CI 9% to 15%), 12% (95% CI 8% to 19%) and 10% (95% CI 8% to 13%) of patients would have been missed during the first night due to single night testing.ConclusionWhile there was no significant difference between mean AHI in two sequential study nights on a group level, there was a remarkable intraindividual NtNV of respiratory events, leading to misdiagnosis and misclassification of patients with suspected OSA.
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6
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Fatt SJ, Beilharz JE, Joubert M, Wilson C, Lloyd AR, Vollmer-Conna U, Cvejic E. Parasympathetic activity is reduced during slow-wave sleep, but not resting wakefulness, in patients with chronic fatigue syndrome. J Clin Sleep Med 2019; 16:19-28. [PMID: 31957647 DOI: 10.5664/jcsm.8114] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES Physiological dearousal characterized by an increase in parasympathetic nervous system activity is important for good-quality sleep. Previous research shows that nocturnal parasympathetic activity (reflected by heart rate variability [HRV]) is diminished in individuals with chronic fatigue syndrome (CFS), suggesting hypervigilant sleep. This study investigated differences in nocturnal autonomic activity across sleep stages and explored the association of parasympathetic activity with sleep quality and self-reported physical and psychological wellbeing in individuals with CFS. METHODS Twenty-four patients with medically diagnosed CFS, and 24 matched healthy control individuals participated. Electroencephalography and HRV were recorded during sleep in participants' homes using a minimally invasive ambulatory device. Questionnaires were used to measure self-reported wellbeing and sleep quality. RESULTS Sleep architecture in patients with CFS differed from that of control participants in slower sleep onset, more awakenings, and a larger proportion of time spent in slow-wave sleep (SWS). Linear mixed-model analyses controlling for age revealed that HRV reflecting parasympathetic activity (normalized high frequency power) was reduced in patients with CFS compared to control participants, particularly during deeper stages of sleep. Poorer self-reported wellbeing and sleep quality was associated with reduced parasympathetic signaling during deeper sleep, but not during wake before sleep, rapid eye movement sleep, or with the proportion of time spent in SWS. CONCLUSIONS Autonomic hypervigilance during the deeper, recuperative stages of sleep is associated with poor quality sleep and self-reported wellbeing. Causal links need to be confirmed but provide potential intervention opportunities for the core symptom of unrefreshing sleep in CFS.
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Affiliation(s)
- Scott J Fatt
- School of Psychiatry, Faculty of Medicine, University of New South Wales Sydney, New South Wales, Australia
| | - Jessica E Beilharz
- School of Psychiatry, Faculty of Medicine, University of New South Wales Sydney, New South Wales, Australia
| | - Michael Joubert
- School of Psychiatry, Faculty of Medicine, University of New South Wales Sydney, New South Wales, Australia
| | - Chloe Wilson
- School of Psychiatry, Faculty of Medicine, University of New South Wales Sydney, New South Wales, Australia
| | - Andrew R Lloyd
- Viral Immunology Systems Program, The Kirby Institute, University of New South Wales Sydney, New South Wales, Australia
| | - Uté Vollmer-Conna
- School of Psychiatry, Faculty of Medicine, University of New South Wales Sydney, New South Wales, Australia
| | - Erin Cvejic
- School of Psychiatry, Faculty of Medicine, University of New South Wales Sydney, New South Wales, Australia.,The University of Sydney, School of Public Health, Faculty of Medicine and Health, New South Wales, Australia
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7
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Veauthier C, Piper SK, Gaede G, Penzel T, Paul F. The first night effect in multiple sclerosis patients undergoing home-based polysomnography. Nat Sci Sleep 2018; 10:337-344. [PMID: 30498381 PMCID: PMC6207396 DOI: 10.2147/nss.s176201] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND The first night effect (FNE) is a polysomnography (PSG) habituation effect in the first of several consecutive in-laboratory PSGs (I-PSGs). The FNE is caused by the discomfort provoked by electrodes and cables and the exposure to an unfamiliar environment. A reverse FNE (RFNE) with an improved sleep in the first night is characteristic of insomnia, presumably because the video PSG in the sleep laboratory leads to a decrease in the negatively toned cognitive activity. Therefore, two or more I-PSGs are required for an accurate diagnosis. Although the FNE is well documented in I-PSG, little is known about the FNE and the RFNE in home-based PSGs (H-PSGs). METHODS This is a retrospective analysis of a recently published cross-sectional study using H-PSG. Sixty-three consecutive patients suffering from multiple sclerosis (MS) were investigated by two consecutive H-PSGs without video. The differences between the first and second H-PSGs were analyzed. The patients were classified into four subgroups: no sleep disorder, insomnia, sleep-related breathing disorders (SRBDs), and periodic limb movement disorder or restless legs syndrome (PLMD/RLS). RESULTS MS patients suffering from insomnia showed no RFNE. MS patients with SRBD or PLMD/RLS showed no reduced sleep efficiency but significantly less slow wave sleep. Furthermore, SRBD patients showed significantly less non-rapid eye movement (NREM) sleep, and PLMD/RLS patients were significantly awake longer in the first night after sleep onset (increased wake-after-sleep-onset time) and showed a higher rapid eye movement (REM) latency. CONCLUSION SRBD and PLMD/RLS patients showed a significant FNE. Two consecutive H-PSGs are required in these patients to obtain a precise hypnogram even in the ambulatory field. In MS patients suffering from insomnia, no RFNE was found, and in insomnia patients one H-PSG seems to be sufficient.
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Affiliation(s)
- Christian Veauthier
- Interdisciplinary Center of Sleep Medicine, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany,
| | - Sophie K Piper
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Biometry and Clinical Epidemiology, Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Gunnar Gaede
- Department of Neurology, St. Joseph Krankenhaus Berlin-Weissensee, Berlin, Germany
| | - Thomas Penzel
- Interdisciplinary Center of Sleep Medicine, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany, .,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Friedemann Paul
- NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Experimental and Clinical Research Center, Max Delbrueck Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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8
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Josev EK, Jackson ML, Bei B, Trinder J, Harvey A, Clarke C, Snodgrass K, Scheinberg A, Knight SJ. Sleep Quality in Adolescents With Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME). J Clin Sleep Med 2017; 13:1057-1066. [PMID: 28760189 PMCID: PMC5566461 DOI: 10.5664/jcsm.6722] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 06/12/2017] [Accepted: 06/14/2017] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES Little is known about the type and severity of sleep disturbances in the pediatric chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) population, compared with healthy adolescents. Using a range of objective and subjective measures, the aim of this study was to investigate sleep quality, the relationship between objective and subjective measures of sleep quality, and their associations with anxiety in adolescents with CFS/ME compared with healthy controls. METHODS Twenty-one adolescents with CFS/ME aged 13 to 18 years (mean age 15.57 ± 1.40), and 145 healthy adolescents aged 13 to 18 years (mean age 16.2 ± 1.00) wore actigraphy watches continuously for 2 weeks to collect a number of objective sleep variables. The Pittsburgh Sleep Quality Index was used to obtain a subjective measure of sleep quality. Anxiety was measured by the Spence Children's Anxiety scale. RESULTS On average over the 2-week period, adolescents with CFS/ME were found to have (1) significantly longer objective sleep onset latency, time in bed, total sleep time, and a later rise time (all P < .005), and (2) significantly poorer subjective sleep quality (P < .001), compared with healthy adolescents. The CFS/ME patient group displayed higher levels of anxiety (P < .05), and in both groups, higher levels of anxiety were significantly related to poorer subjective sleep quality (P < .001). CONCLUSIONS This study provides objective and subjective evidence of sleep disturbance in adolescents with CFS/ME compared with healthy adolescent controls.
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Affiliation(s)
- Elisha K Josev
- Clinical Sciences, Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
- Melbourne School of Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Melinda L Jackson
- Melbourne School of Psychological Sciences, University of Melbourne, Melbourne, Australia
- School of Health and Biomedical Sciences, Royal Melbourne Institute of Technology, Melbourne, Australia
| | - Bei Bei
- Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, Australia
- Centre for Women's Mental Health, Department of Psychiatry, University of Melbourne, Royal Women's Hospital, Melbourne, Australia
| | - John Trinder
- Melbourne School of Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Adrienne Harvey
- Clinical Sciences, Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
- Developmental Medicine, Royal Children's Hospital, Melbourne, Australia
| | - Cathriona Clarke
- Clinical Sciences, Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
| | - Kelli Snodgrass
- Clinical Sciences, Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
| | - Adam Scheinberg
- Clinical Sciences, Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
- Victorian Paediatric Rehabilitation Service, Royal Children's Hospital, Melbourne, Australia
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Sarah J Knight
- Clinical Sciences, Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Australia
- Victorian Paediatric Rehabilitation Service, Royal Children's Hospital, Melbourne, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
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9
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Jain V, Marbach J, Kimbro S, Andrade DC, Jain A, Capozzi E, Mele K, Del Rio R, Kay MW, Mendelowitz D. Benefits of oxytocin administration in obstructive sleep apnea. Am J Physiol Lung Cell Mol Physiol 2017; 313:L825-L833. [PMID: 28798255 DOI: 10.1152/ajplung.00206.2017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/04/2017] [Accepted: 08/04/2017] [Indexed: 11/22/2022] Open
Abstract
Activation of oxytocin receptors has shown benefits in animal models of obstructive sleep apnea (OSA). We tested if nocturnal oxytocin administration could have beneficial effects in OSA patients. Eight patients diagnosed with OSA were administered intranasal oxytocin (40 IU). Changes in cardiorespiratory events during sleep, including apnea and hypopnea durations and frequency, risk of event-associated arousals, and heart rate variability, were assessed. Oxytocin significantly increased indexes of parasympathetic activity, including heart rate variability, total sleep time, and the postpolysommogram sleep assessment score, an index of self-reported sleep satisfaction. Although the apnea-hypopnea index was not significantly changed with oxytocin administration, when apnea and hypopnea events were compared independently, the frequency of hypopneas, but not apneas, was significantly (P ≤ 0.005) decreased with oxytocin treatment. Both apneas and hypopneas were significantly shortened in duration with oxytocin treatment. Oxytocin treatment significantly decreased the percent of apnea and hypopnea events that were accompanied with an arousal. Oxytocin administration has the potential to restore cardiorespiratory homeostasis and reduce some clinically important (objective and patient-reported) adverse events that occur with OSA. Additional studies are needed to further understand the mechanisms by which oxytocin promotes these changes in cardiorespiratory and autonomic function in OSA patients.
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Affiliation(s)
- Vivek Jain
- Department of Medicine, The George Washington University, Washington, District of Columbia
| | - Joseph Marbach
- Department of Biomedical Engineering, The George Washington University, Washington, District of Columbia
| | - Shawn Kimbro
- Department of Medicine, The George Washington University, Washington, District of Columbia
| | - David C Andrade
- Laboratory of Cardiorespiratory Control, Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile; and
| | - Arad Jain
- Department of Medicine, The George Washington University, Washington, District of Columbia
| | - Eleanor Capozzi
- Department of Medicine, The George Washington University, Washington, District of Columbia
| | - Kyle Mele
- Department of Medicine, The George Washington University, Washington, District of Columbia
| | - Rodrigo Del Rio
- Laboratory of Cardiorespiratory Control, Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile; and
| | - Matthew W Kay
- Department of Biomedical Engineering, The George Washington University, Washington, District of Columbia
| | - David Mendelowitz
- Department of Pharmacology and Physiology, The George Washington University, Washington, District of Columbia
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10
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Blackwell T, Paudel M, Redline S, Ancoli-Israel S, Stone KL. A novel approach using actigraphy to quantify the level of disruption of sleep by in-home polysomnography: the MrOS Sleep Study: Sleep disruption by polysomnography. Sleep Med 2017; 32:97-104. [PMID: 28366349 PMCID: PMC5380148 DOI: 10.1016/j.sleep.2016.11.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/28/2016] [Accepted: 11/29/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND The "first-night effect" of polysomnography (PSG) has been previously studied; however, the ability to quantify the sleep disruption level has been confounded with the use of PSG on all nights. We used actigraphy to quantify disruption level and examined characteristics associated with disruption. METHODS Totally, 778 older men (76.2 ± 5.4 years) from a population-based study at six US centers underwent one night of in-home PSG. Actigraphy was performed on the PSG night and three subsequent nights. Actigraphically measured total sleep time (TST), sleep efficiency (SE), wake after sleep onset (WASO), and sleep onset latency (SOL) from the PSG night and subsequent nights were compared. Linear regression models were used to examine the association of characteristics and sleep disruption. RESULTS On average, sleep on the PSG night was worse than the following night (p < 0.05, TST 21 ± 85 min less, SE 2.3 ± 11.3% less, WASO 4.9 ± 51.8 min more, SOL 6.6 ± 56.2 min more). Sleep on the PSG night was significantly worse than that two and three nights later. Characteristics associated with greater sleep disruption on the PSG night included older age, higher apnea-hypopnea index, worse neuromuscular function, and more depressive symptoms. Minorities and men with excessive daytime sleepiness slept somewhat better on the PSG night. CONCLUSIONS Among older men, there was sleep disruption on the PSG night, which may lead to sleep time underestimation. The increase of sleep on the night after the PSG suggests that data from the second monitoring may overestimate sleep.
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Affiliation(s)
- Terri Blackwell
- California Pacific Medical Center Research Institute, San Francisco, CA, United States.
| | - Misti Paudel
- Division of Epidemiology & Community Health, University of Minnesota, Minneapolis, MN, United States
| | - Susan Redline
- Department of Medicine, Brigham and Women's Hospital and Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Sonia Ancoli-Israel
- Department of Psychiatry and Medicine, University of California, San Diego, La Jolla, CA, United States
| | - Katie L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA, United States
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11
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Tu Q, Heitkemper MM, Jarrett ME, Buchanan DT. Sleep disturbances in irritable bowel syndrome: a systematic review. Neurogastroenterol Motil 2017; 29. [PMID: 27683238 DOI: 10.1111/nmo.12946] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/21/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND Sleep disturbances are well-documented among persons with irritable bowel syndrome (IBS). Difficulty in falling asleep, shorter sleep time, frequent arousal and awakenings, or non-restorative sleep are the most common manifestations. Sleep disturbances are also related to a higher risk of having IBS. Some researchers have provided evidence of a positive association between poorer subjective sleep quality and increased severity and frequency in gastrointestinal (GI) symptoms in those with IBS. However, findings from studies using objective sleep and activity measures, such as polysomnography and actigraphy, are inconclusive. PURPOSE This systematic review of the literature between 1990 and 2015 evaluates the evidence of sleep disturbances in adults with IBS and their relationship with GI symptoms.
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Affiliation(s)
- Q Tu
- Department of Biobehavioral Nursing and Health Systems, School of Nursing, University of Washington School of Nursing, Seattle, WA, USA
| | - M M Heitkemper
- Department of Biobehavioral Nursing and Health Systems, School of Nursing, University of Washington School of Nursing, Seattle, WA, USA
| | - M E Jarrett
- Department of Biobehavioral Nursing and Health Systems, School of Nursing, University of Washington School of Nursing, Seattle, WA, USA
| | - D T Buchanan
- Department of Biobehavioral Nursing and Health Systems, School of Nursing, University of Washington School of Nursing, Seattle, WA, USA
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12
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Gerber M, Colledge F, Pühse U, Holsboer-Trachsler E, Zimmerer S, Brand S. Sleep Quality, Sleep EEG Pattern, Mental Well-Being and Cortisol Secretion in Patients with Ruptured Aneurysm Post-Treatment: A Comparison with Post-Surgery Meningioma Patients and Controls. Neuropsychobiology 2017; 73:148-59. [PMID: 27064792 DOI: 10.1159/000444492] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 01/31/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND Although the chance of surviving an aneurysmal subarachnoid haemorrhage (aSAH) has increased steadily, disturbed sleep and persistent psychological complaints are frequently experienced post-ictus. To date, however, few studies have sought to determine whether physiological parameters, such as objectively measured sleep and cortisol secretion, interrelate significantly with low sleep quality and psychological complaints such as depression. Furthermore, there is little evidence as to whether post-ictal complaints differ between aSAH patients and other groups who have experienced stressful medical intervention. METHODS Data on objective and subjective sleep, sleep-related dysfunctional cognitions, psychological functioning and cortisol secretion were collected from 15 patients who had undergone medical intervention for aSAH. Data were also collected from a group of 16 individuals who had undergone surgery for a meningioma and a third group made up of 17 healthy participants. RESULTS aSAH patients and meningioma patients had significantly poorer subjective sleep than healthy controls and reported more sleep-related dysfunctional cognitions and hypochondriacal beliefs. They also had a significantly higher morning cortisol response. Finally, a non-significant trend was found showing that aSAH patients and meningioma patients reported poorer psychological functioning than healthy controls. CONCLUSION Following treatment, aSAH patients and meningioma patients experience poorer subjective sleep and some differences in objectively measured sleep, which might be attributable to increased sleep-related dysfunctional cognitions and poorer overall psychological functioning. Differences in cortisol production were also observed, suggesting that some physiological imbalances are still present post-ictus.
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Affiliation(s)
- Markus Gerber
- Department of Sport, Exercise and Health, University Hospital, Basel, Switzerland
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13
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Suzuki H, Yoshimiura M, Iwata Y, Oguchi S, Kawara M, Chow CM. Lip muscle training improves obstructive sleep apnea and objective sleep: a case report. ACTA ACUST UNITED AC 2017; 10:128-131. [PMID: 29410742 PMCID: PMC5699856 DOI: 10.5935/1984-0063.20170022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
The present study assessed the potential of lip muscle training for improving
sleep. A patient with heavy snoring, daytime sleepiness and dry mouth underwent
lip muscle training. Lip closure force LCFmax increased by 67.3% and LCFmin by
152% post-training. AHI decreased from 12.2 to 3.9 events/h by reducing
hypopneic episodes. TST, sleep stage N3 and REM sleep increased, and WASO, sleep
stage N1, and AI decreased. The patient switched from mouth to nose breathing
during sleep and stopped snoring. Improved LCF, by moving the tongue into the
anterior-superior oral cavity, may increase upper airway space and reduce the
hypopnea index.
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Affiliation(s)
- Hiroshi Suzuki
- Nihon University School of Dentistry at Matsudo, Department of Oral Function and Rehabilitation, Matsudo, Japão
| | - Mayuko Yoshimiura
- Nihon University School of Dentistry at Matsudo, Department of Oral Function and Rehabilitation, Matsudo, Japão
| | - Yoshihiro Iwata
- Nihon University School of Dentistry at Matsudo, Department of Oral Function and Rehabilitation, Matsudo, Japão
| | - Sumito Oguchi
- Nihon University School of Dentistry at Matsudo, Department of Internal Medicine - Matsudo, Japão
| | - Misao Kawara
- Nihon University School of Dentistry at Matsudo, Department of Oral Function and Rehabilitation, Matsudo, Japão
| | - Chin-Moi Chow
- Faculty of Health Sciences, The University of Sydney, Discipline of Exercise and Sport Science - Sidney, Austrália
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14
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Abstract
OBJECTIVES Evidence of a 'first night effect' has been documented for polysomnography. The possibility of this has not been previously assessed in wrist actigraphy, yet may have important implications for the study design of future sleep research. We sought to examine potential evidence of a 'first night effect' for wrist actigraphy in adolescents across weekdays and weekend nights for multiple sleep outcomes. DESIGN 3-year prospective cohort study (Midlands Adolescent Schools Sleep Education Study). SETTING 8 secondary schools in the Midlands region of the UK. PARTICIPANTS Adolescents (aged 11-13 years at baseline) were recruited to the study and were requested to wear a wrist actigraph for 7 consecutive days/nights at baseline and then annually for 2 years during the second term of the academic year. PRIMARY OUTCOME MEASURES We compared multiple sleep outcomes (total sleep time, wake after sleep onset, sleep efficiency, sleep onset latency, number of awakenings, length of awakenings, sleep onset time) when the device was worn on a weekday and weekend and compared these to other nights to identify possible evidence of a 'first night effect' for wrist actigraphy. RESULTS No significant differences were found between any sleep outcomes when the first night of wrist actigraphy was on a weekday compared with other weekdays. When the first night was measured on a weekend (Friday), average total sleep time was significantly greater (486±5 min) compared with the second night (Saturday; 469±6 min), p=0.01. CONCLUSIONS We found no evidence to support a 'first night effect' for wrist actigraphy in our adolescent sample. The first night of actigraphy data should not be disregarded in future studies that deploy this technique to measure sleep over prolonged time periods.
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Affiliation(s)
- Teresa Arora
- Department of Medicine and Clinical Research Core, Weill Cornell Medicine in New York USA, Doha, Qatar
| | - Omar M Omar
- Department of Medicine and Clinical Research Core, Weill Cornell Medicine in New York USA, Doha, Qatar
| | - Shahrad Taheri
- Department of Medicine and Clinical Research Core, Weill Cornell Medicine in New York USA, Doha, Qatar
- Department of Medicine, King's College London, London, UK
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15
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Comparison between home and hospital set-up for unattended home-based polysomnography: a prospective randomized study. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Arbasino C, Calorio F, d’Orsi G, Marchioni E, Tartara E, Marchese D, Rustioni V, Moglia A, Galimberti CA. Interictal spiking in adult newly-diagnosed focal epilepsy of unknown cause: The effect of age. Clin Neurophysiol 2015; 126:1498-504. [DOI: 10.1016/j.clinph.2014.10.155] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/26/2014] [Accepted: 10/27/2014] [Indexed: 11/29/2022]
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17
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Hirscher V, Unbehaun T, Feige B, Nissen C, Riemann D, Spiegelhalder K. Patients with primary insomnia in the sleep laboratory: do they present with typical nights of sleep? J Sleep Res 2015; 24:383-9. [PMID: 25659408 DOI: 10.1111/jsr.12280] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 12/20/2014] [Indexed: 10/24/2022]
Abstract
The validity of sleep laboratory investigations in patients with insomnia is important for researchers and clinicians. The objective of this study was to examine the first-night effect and the reverse first-night effect in patients with chronic primary insomnia compared with good sleeper controls. A retrospective comparison of a well-characterised sample of 50 patients with primary insomnia and 50 good sleeper controls was conducted with respect to 2 nights of polysomnography, and subjective sleep parameters in the sleep laboratory and the home setting. When comparing the first and second sleep laboratory night, a significant first-night effect was observed across both groups in the great majority of the investigated polysomnographic and subjective variables. However, patients with primary insomnia and good sleeper controls did not differ with respect to this effect. Regarding the comparison between the sleep laboratory nights and the home setting, unlike good sleeper controls, patients with primary insomnia reported an increased subjective sleep efficiency on both nights (in part due to a reduced bed time) and an increased subjective total sleep time on the second night. These results suggest that even the second sleep laboratory night does not necessarily provide clinicians and researchers with a representative insight into the sleep perception of patients with primary insomnia. Future studies should investigate whether these findings also hold for other patient populations.
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Affiliation(s)
- Verena Hirscher
- Division of Psychosomatic Medicine, Kantonspital St. Gallen, St. Gallen, Switzerland
| | - Thomas Unbehaun
- Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center, Freiburg, Germany
| | - Bernd Feige
- Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center, Freiburg, Germany
| | - Christoph Nissen
- Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center, Freiburg, Germany
| | - Dieter Riemann
- Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center, Freiburg, Germany
| | - Kai Spiegelhalder
- Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center, Freiburg, Germany
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18
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Kis A, Szakadát S, Simor P, Gombos F, Horváth K, Bódizs R. Objective and subjective components of the first-night effect in young nightmare sufferers and healthy participants. Behav Sleep Med 2014; 12:469-80. [PMID: 24294972 DOI: 10.1080/15402002.2013.829062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The first-night effect--marked differences between the first- and the second-night sleep spent in a laboratory--is a widely known phenomenon that accounts for the common practice of excluding the first-night sleep from any polysomnographic analysis. The extent to which the first-night effect is present in a participant, as well as its duration (1 or more nights), might have diagnostic value and should account for different protocols used for distinct patient groups. This study investigated the first-night effect on nightmare sufferers (NM; N = 12) and healthy controls (N = 15) using both objective (2-night-long polysomnography) and subjective (Groningen Sleep Quality Scale for the 2 nights spent in the laboratory and 1 regular night spent at home) methods. Differences were found in both the objective (sleep efficiency, wakefulness after sleep onset, sleep latency, Stage-1 duration, Stage-2 duration, slow-wave sleep duration, and REM duration) and subjective (self-rating) variables between the 2 nights and the 2 groups, with a more pronounced first-night effect in the case of the NM group. Furthermore, subjective sleep quality was strongly related to polysomnographic variables and did not differ among 1 regular night spent at home and the second night spent in the laboratory. The importance of these results is discussed from a diagnostic point of view.
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Affiliation(s)
- Anna Kis
- a Department of Cognitive Sciences Budapest University of Technology and Economics
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19
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Tamaki M, Bang JW, Watanabe T, Sasaki Y. The first-night effect suppresses the strength of slow-wave activity originating in the visual areas during sleep. Vision Res 2014; 99:154-61. [PMID: 24211789 PMCID: PMC4013254 DOI: 10.1016/j.visres.2013.10.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 10/29/2013] [Accepted: 10/30/2013] [Indexed: 01/12/2023]
Abstract
Our visual system is plastic and adaptive in response to the stimuli and environments we experience. Although visual adaptation and plasticity have been extensively studied while participants are awake, little is known about what happens while they are asleep. It has been documented that sleep structure as measured by sleep stages using polysomnography is altered specifically in the first sleep session due to exposure to a new sleep environment, known as the first-night effect (FNE). However, the impact of the FNE on spontaneous oscillations in the visual system is poorly understood. How does the FNE affect the visual system during sleep? To address this question, the present study examined whether the FNE modifies the strength of slow-wave activity (SWA, 1-4Hz)-the dominant spontaneous brain oscillation in slow-wave sleep-in the visual areas. We measured the strength of SWA originating in the visual areas during the first and the second sleep sessions. Magnetoencephalography, polysomnography, and magnetic resonance imaging were used to localize the source of SWA to the visual areas. The visual areas were objectively defined using retinotopic mapping and an automated anatomical parcellation technique. The results showed that the strength of SWA was reduced in the first sleep session in comparison to the second sleep session, especially during slow-wave sleep, in the ventral part of the visual areas. These results suggest that environmental novelty may affect the visual system through suppression of SWA. The impact of the FNE may not be negligible in vision research.
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Affiliation(s)
- Masako Tamaki
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA.
| | - Ji Won Bang
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA.
| | - Takeo Watanabe
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA.
| | - Yuka Sasaki
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA.
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20
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Jobert M, Wilson FJ, Roth T, Ruigt GSF, Anderer P, Drinkenburg WHIM, Bes FW, Brunovsky M, Danker-Hopfe H, Freeman J, van Gerven JMA, Gruber G, Kemp B, Klösch G, Ma J, Penzel T, Peterson BT, Schulz H, Staner L, Saletu B, Svetnik V. Guidelines for the recording and evaluation of pharmaco-sleep studies in man: the International Pharmaco-EEG Society (IPEG). Neuropsychobiology 2014; 67:127-67. [PMID: 23548759 DOI: 10.1159/000343449] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 11/26/2012] [Indexed: 01/19/2023]
Abstract
The International Pharmaco-EEG Society (IPEG) presents guidelines summarising the requirements for the recording and computerised evaluation of pharmaco-sleep data in man. Over the past years, technical and data-processing methods have advanced steadily, thus enhancing data quality and expanding the palette of sleep assessment tools that can be used to investigate the activity of drugs on the central nervous system (CNS), determine the time course of effects and pharmacodynamic properties of novel therapeutics, hence enabling the study of the pharmacokinetic/pharmacodynamic relationship, and evaluate the CNS penetration or toxicity of compounds. However, despite the presence of robust guidelines on the scoring of polysomnography -recordings, a review of the literature reveals inconsistent -aspects in the operating procedures from one study to another. While this fact does not invalidate results, the lack of standardisation constitutes a regrettable shortcoming, especially in the context of drug development programmes. The present guidelines are intended to assist investigators, who are using pharmaco-sleep measures in clinical research, in an effort to provide clear and concise recommendations and thereby to standardise methodology and facilitate comparability of data across laboratories.
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Affiliation(s)
- Marc Jobert
- International Pharmaco-EEG Society, Berlin, Germany.
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21
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Gotts ZM, Deary V, Newton J, Van der Dussen D, De Roy P, Ellis JG. Are there sleep-specific phenotypes in patients with chronic fatigue syndrome? A cross-sectional polysomnography analysis. BMJ Open 2013; 3:e002999. [PMID: 23794547 PMCID: PMC3669720 DOI: 10.1136/bmjopen-2013-002999] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 04/24/2013] [Accepted: 04/25/2013] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVES Despite sleep disturbances being a central complaint in patients with chronic fatigue syndrome (CFS), evidence of objective sleep abnormalities from over 30 studies is inconsistent. The present study aimed to identify whether sleep-specific phenotypes exist in CFS and explore objective characteristics that could differentiate phenotypes, while also being relevant to routine clinical practice. DESIGN A cross-sectional, single-site study. SETTING A fatigue clinic in the Netherlands. PARTICIPANTS A consecutive series of 343 patients meeting the criteria for CFS, according to the Fukuda definition. MEASURES Patients underwent a single night of polysomnography (all-night recording of EEG, electromyography, electrooculography, ECG and respiration) that was hand-scored by a researcher blind to diagnosis and patient history. RESULTS Of the 343 patients, 104 (30.3%) were identified with a Primary Sleep Disorder explaining their diagnosis. A hierarchical cluster analysis on the remaining 239 patients resulted in four sleep phenotypes being identified at saturation. Of the 239 patients, 89.1% met quantitative criteria for at least one objective sleep problem. A one-way analysis of variance confirmed distinct sleep profiles for each sleep phenotype. Relatively longer sleep onset latencies, longer Rapid Eye Movement (REM) latencies and smaller percentages of both stage 2 and REM characterised the first phenotype. The second phenotype was characterised by more frequent arousals per hour. The third phenotype was characterised by a longer Total Sleep Time, shorter REM Latencies, and a higher percentage of REM and lower percentage of wake time. The final phenotype had the shortest Total Sleep Time and the highest percentage of wake time and wake after sleep onset. CONCLUSIONS The results highlight the need to routinely screen for Primary Sleep Disorders in clinical practice and tailor sleep interventions, based on phenotype, to patients presenting with CFS. The results are discussed in terms of matching patients' self-reported sleep to these phenotypes in clinical practice.
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Affiliation(s)
- Zoe M Gotts
- Northumbria Centre for Sleep Research, Department of Psychology, Northumbria University, Newcastle, UK
| | - Vincent Deary
- Northumbria Centre for Sleep Research, Department of Psychology, Northumbria University, Newcastle, UK
| | - Julia Newton
- Institute for Ageing and Health, Newcastle University, Newcastle, UK
| | | | - Pierre De Roy
- Fatigue Service, VermoeidheidCentrum Nederland bv, Lelystad, The Netherlands
| | - Jason G Ellis
- Northumbria Centre for Sleep Research, Department of Psychology, Northumbria University, Newcastle, UK
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22
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Mariman AN, Vogelaers DP, Tobback E, Delesie LM, Hanoulle IP, Pevernagie DA. Sleep in the chronic fatigue syndrome. Sleep Med Rev 2013; 17:193-9. [DOI: 10.1016/j.smrv.2012.06.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 06/13/2012] [Accepted: 06/14/2012] [Indexed: 01/24/2023]
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23
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Le Bon O, Neu D, Berquin Y, Lanquart JP, Hoffmann R, Mairesse O, Armitage R. Ultra-slow delta power in chronic fatigue syndrome. Psychiatry Res 2012; 200:742-7. [PMID: 22771174 DOI: 10.1016/j.psychres.2012.06.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2011] [Revised: 05/03/2012] [Accepted: 06/20/2012] [Indexed: 10/28/2022]
Abstract
The role of sleep in patients diagnosed with chronic fatigue syndrome is not fully understood. Studies of polysomnographic and quantitative sleep electroencephalographic (EEG) measures have provided contradictory results, with few consistent findings in patients with Chronic Fatigue Syndrome (CFS). For the most part, it appears that delta EEG activity may provide the best discrimination between patients and healthy controls. A closer examination of delta activity in the very slow end of the frequency band is still to be considered in assessing sleep in CFS. The present preliminary study compared absolute and relative spectral power in conventional EEG bands and ultra-slow delta (0.5-0.8Hz) between 10 young female patients with the CFS and healthy controls without psychopathology. In absolute measures, the ultra-slow delta power was lower in CFS, about one-fifth that of the control group. Other frequency bands did not differ between groups. Relative ultra-slow delta power was lower in patients than in controls. CFS is associated with lower ultra-slow (0.5-0.8Hz) delta power, underscoring the importance of looking beyond conventional EEG frequency bands. From a neurophysiological standpoint, lower ultra-slow wave power may indicate abnormalities in the oscillations in membrane potential or a failure in neural recruitment in those with CFS.
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Affiliation(s)
- Olivier Le Bon
- Brugmann University Hospital, Sleep Laboratory and Unit for Chronobiology U78, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium.
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24
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Newell J, Mairesse O, Verbanck P, Neu D. Is a one-night stay in the lab really enough to conclude? First-night effect and night-to-night variability in polysomnographic recordings among different clinical population samples. Psychiatry Res 2012; 200:795-801. [PMID: 22901399 DOI: 10.1016/j.psychres.2012.07.045] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 06/20/2012] [Accepted: 07/29/2012] [Indexed: 11/28/2022]
Abstract
While polysomnography remains the current gold standard in sleep investigation, guidelines for single night versus consecutive recordings in a sleep laboratory have been disputed mainly because of two phenomena: the first-night effect and night-to-night variability. One hundred and twenty nine subjects, that underwent two consecutive nights of polysomnographic recording in a general University Hospital's sleep lab, were divided into four groups: sleep-related breathing disorders (SRBD), insomnia, movement and behavioral disorders and a healthy control (HC) group based on their complaints at admission and sleep study results. Sleep parameters of both consecutive two nights were compared and analyzed. All groups showed a significant first-night effect. However the latter seemed more pronounced in the insomnia group. Furthermore, a clinically significant intra-patient night-to-night variability was found for the apnea-hypopnea index in the SRBD-group. Due to the observed first-night effect among any subject group and the potential impact of night-to-night variability of the apnea-hypopnea index, we conclude that the clinical assessment of sleep disorders should be similar in every patient. Hence, the present study underlines the importance of two consecutive nights of polysomnographic recording as a potential reference standard for the execution of sleep investigations.
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Affiliation(s)
- Johan Newell
- UZ Brussel Academic University Hospital, Department of Psychiatry, Vrije Universiteit Brussel (V.U.B.), Brussels, Belgium.
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25
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Jackson ML, Bruck D. Sleep abnormalities in chronic fatigue syndrome/myalgic encephalomyelitis: a review. J Clin Sleep Med 2012; 8:719-28. [PMID: 23243408 PMCID: PMC3501671 DOI: 10.5664/jcsm.2276] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) is a chronic, disabling illness that affects approximately 0.2% of the population. Non-restorative sleep despite sufficient or extended total sleep time is one of the major clinical diagnostic criteria; however, the underlying cause of this symptom is unknown. This review aims to provide a comprehensive overview of the literature examining sleep in CFS/ME and the issues surrounding the current research findings. Polysomnographic and other objective measures of sleep have observed few differences in sleep parameters between CFS/ME patients and healthy controls, although some discrepancies do exist. This lack of significant objective differences contrasts with the common subjective complaints of disturbed and unrefreshed sleep by CFS/ME patients. The emergence of new, more sensitive techniques that examine the microstructure of sleep are showing promise for detecting differences in sleep between patients and healthy individuals. There is preliminary evidence that alterations in sleep stage transitions and sleep instability, and other physiological mechanisms, such as heart rate variability and altered cortisol profiles, may be evident. Future research investigating the etiology of non-restorative sleep in CFS/ME may also help us to undercover the causes of non-restorative sleep and fatigue in other medical conditions.
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Affiliation(s)
- Melinda L Jackson
- School of Social Sciences and Psychology, Victoria University, Victoria, Australia.
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Zheng H, Sowers M, Buysse DJ, Consens F, Kravitz HM, Matthews KA, Owens JF, Gold EB, Hall M. Sources of variability in epidemiological studies of sleep using repeated nights of in-home polysomnography: SWAN Sleep Study. J Clin Sleep Med 2012; 8:87-96. [PMID: 22334814 PMCID: PMC3266336 DOI: 10.5664/jcsm.1670] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVE To quantify sources of night-to-night variability. METHODS This project was conducted in 285 middle-aged African American, Caucasian, and Chinese women from the Study of Women's Health Across the Nation (SWAN) Sleep Study living in Chicago, the Detroit area, Oakland, and Pittsburgh. The study used 3 repeated nights of in-home polysomnography (PSG) measures. Night 1 data included assessment of sleep staging, sleep apnea, and periodic limb movements, while Nights 2 and 3 focused on sleep staging. RESULTS Mean total sleep time (TST) increased substantially from 365 minutes on Night 1 to 391 minutes and 380 minutes, respectively, on Nights 2 and 3. Mean percent sleep efficiency (SE%) for the 3 nights were 83%, 85%, and 85%, respectively. Night 1 sleep values were significantly different than Nights 2 and 3 measures except for S2 (%), S1 (min), and Delta (S3+4)%. Nights 2 and 3 differences in variability were negligible. Obesity, past smoking, and financial strain measures were associated with greater Night 1 vs. Night 2 or Night 3 differences. We concluded that there was significant Night 1 vs. Nights 2 and 3 variability and, though relatively modest, it was sufficient to bias estimates of association. Additionally, personal characteristics including smoking, obesity, and financial strain increased night-to-night variability. CONCLUSIONS This reports adds new information about between and within person sources of variation with in-home PSG and identifies elements that are essential in the design and planning of future sleep studies of multi-ethnic groups in social and physiological transition states such as the menopause.
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Affiliation(s)
- Huiyong Zheng
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA.
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Minakuchi H, Sakaguchi C, Hara ES, Maekawa K, Matsuka Y, Clark GT, Kuboki T. Multiple sleep bruxism data collected using a self-contained EMG detector/analyzer system in asymptomatic healthy subjects. Sleep Breath 2012; 16:1069-72. [DOI: 10.1007/s11325-011-0602-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 09/06/2011] [Accepted: 09/21/2011] [Indexed: 10/14/2022]
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Affiliation(s)
- Carol A Landis
- Department of Biobehavioral Nursing and Health System, University of Washington, Seatle, WA 98195-7266, USA.
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Herbst E, Metzler TJ, Lenoci M, McCaslin SE, Inslicht S, Marmar CR, Neylan TC. Adaptation effects to sleep studies in participants with and without chronic posttraumatic stress disorder. Psychophysiology 2010; 47:1127-33. [PMID: 20456661 PMCID: PMC2925054 DOI: 10.1111/j.1469-8986.2010.01030.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The "first night effect" (FNE) is the alteration of sleep architecture observed on the first night of polysomnographic (PSG) studies. It is unclear whether the FNE reflects adaptation to the equipment, sleeping environment, or both. Moreover, it is possible that certain patient populations, such as those with posttraumatic stress disorder (PTSD), demonstrate greater adaptation effects that are highly context dependent. We assessed FNE in participants with PTSD and healthy controls in a cross-sectional study consisting of PSG testing at home and in the hospital. Contrary to our expectations, the PTSD group showed no adaptation effects in either setting. Only the control group assigned to the "hospital first" condition showed significant decreases in total sleep time on night 1 versus night 2 of the study. The results suggest that the FNE is related to adaptation to the combination of the hospital environment and the recording equipment.
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Affiliation(s)
- Ellen Herbst
- Department of Psychiatry, University of California San Francisco, San Francisco, California, USA
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30
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High slow-wave sleep and low-light sleep: chronic fatigue syndrome is not likely to be a primary sleep disorder. J Clin Neurophysiol 2009; 26:207-12. [PMID: 19424087 DOI: 10.1097/wnp.0b013e3181a1841b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The status of chronic fatigue syndrome (CFS) is still under debate. Mainstream views still often consider it as an undetected primary sleep disorder or as the psychosomatic expression of a related anxiety or depression syndrome. Both primary sleep disorder and CFS are often related to unrefreshing sleep and affective daytime symptoms. The present study compares nonrapid eye movement sleep distribution between patients with a primary sleep disorder and "pure" CFS patients without sleep or mood disorders. Intensity measures of affective symptoms are also analyzed. Sleep variables of 32 pure CFS (mean age, 41.9 +/- 8.7 years; 25 women), 30 Sleep Apnea Hypopnea Syndrome patients (mean age, 43.7 +/- 6.7 years; 13 women), and 14 healthy controls (mean age, 40.2 +/- 7.6 years; 9 women) were compared. Related affective symptoms were assessed using the self-reported Zung anxiety and depression scales. The study confirms previous reports on increased slow-wave sleep in CFS patients. Both patient groups showed similar sleep duration and efficiency. Sleep efficiency was lower in both patient groups compared with controls. CFS patients showed a higher microarousal index than controls. Anxiety, but not depression symptoms were more intense in the CFS group. The distribution of nonrapid eye movement sleep in CFS differs sizeably from what can be observed in a primary sleep disorder.
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Neu D, Mairesse O, Hoffmann G, Dris A, Lambrecht LJ, Linkowski P, Verbanck P, Le Bon O. Sleep quality perception in the chronic fatigue syndrome: correlations with sleep efficiency, affective symptoms and intensity of fatigue. Neuropsychobiology 2008; 56:40-6. [PMID: 17986836 DOI: 10.1159/000110727] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Accepted: 08/18/2007] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS One of the core symptoms of the chronic fatigue syndrome (CFS) is unrefreshing sleep and a subjective sensation of poor sleep quality. Whether this perception can be expressed, in a standardized questionnaire as the Pittsburgh Sleep Quality Index (PSQI), has to our knowledge never been documented in CFS. Furthermore, correlations of subjective fatigue, PSQI, affective symptoms and objective parameters such as sleep efficiency are poorly described in the literature. METHODS Using a cross-sectional paradigm, we studied subjective measures like PSQI, Fatigue Severity Scale scores and intensity of affective symptoms rated by the Hamilton Depression and Anxiety scales as well as objective sleep quality parameters measured by polysomnography of 28 'pure' (no primary sleep and no psychiatric disorders) CFS patients compared to age- and gender-matched healthy controls. RESULTS The PSQI showed significantly poorer subjective sleep quality in CFS patients than in healthy controls. In contrast, objective sleep quality parameters, like the Sleep Efficiency Index (SEI) or the amount of slow-wave sleep did not differ significantly. Subjective sleep quality showed a correlation trend with severity of fatigue and was not correlated with the intensity of affective symptoms in CFS. CONCLUSION Our findings indicate that a sleep quality misperception exists in CFS or that potential nocturnal neurophysiological disturbances involved in the nonrecovering sensation in CFS are not expressed by sleep variables such as the SEI or sleep stage distributions and proportions.
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Affiliation(s)
- Daniel Neu
- Sleep Laboratory, Department of Psychiatry, University Hospital Brugmann, Brussels, Belgium.
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Okura K, Lavigne GJ, Huynh N, Manzini C, Fillipini D, Montplaisir JY. Comparison of sleep variables between chronic widespread musculoskeletal pain, insomnia, periodic leg movements syndrome and control subjects in a clinical sleep medicine practice. Sleep Med 2007; 9:352-61. [PMID: 17804292 DOI: 10.1016/j.sleep.2007.07.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Revised: 07/03/2007] [Accepted: 07/12/2007] [Indexed: 10/22/2022]
Abstract
BACKGROUND Between 50% and 89% of chronic pain patients report unrefreshing sleep. The aim of this retrospective analysis was to compare the sleep of normal subjects with the sleep of a clinical population presenting musculoskeletal chronic widespread pain (CWP), psychophysiological insomnia and restless legs syndrome/periodic limb movements during sleep (RLS/PLMS) in order to identify sleep variables that may explain the poor sleep complaints of CWP patients. METHODS Sleep data from 10 normal subjects and 37 patients (mean age 55+/-3 yo), matched for age and sex, were retrieved from our sleep data bank. Sub-analysis controlled for the effects of medication. RESULTS In comparison to normal subjects, sleep duration was shorter in CWP patients (-71 min; p<0.01); sleep efficiency was significantly lower in CWP and insomnia patients (-10.1% and -11.1%, respectively; p<0.05). CWP and PLMS patients lost one non-rapid eye movement (REM) to REM sleep cycle (p<0.04). An intermediate level of PLM was observed during the sleep of CWP patients in comparison to normal subjects (8.8/h vs. 2.0/h) and PLMS patients (33/h). Regular use of non-narcotic analgesics did not seem to interfere with sleep variables. CONCLUSIONS The sleep of middle-aged patients with CWP is comparable to that of insomnia patients. The moderate level of PLM during sleep suggests that such sensory motor activity needs to be evaluated in patients suffering from chronic pain.
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Affiliation(s)
- Kazuo Okura
- Facultés de médecine dentaire et de médecine, Université de Montréal, CP 6128, succursale Centre-ville, Montréal, Que., Canada
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Suetsugi M, Mizuki Y, Yamamoto K, Uchida S, Watanabe Y. The effect of placebo administration on the first-night effect in healthy young volunteers. Prog Neuropsychopharmacol Biol Psychiatry 2007; 31:839-47. [PMID: 17328999 DOI: 10.1016/j.pnpbp.2007.01.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Revised: 01/23/2007] [Accepted: 01/23/2007] [Indexed: 10/23/2022]
Abstract
The first-night effect is a well-known phenomenon that is considered to result from a subject's lack of adaptation to the unfamiliar environment of a sleep laboratory and to the technical equipment used for polysomnography. The effect has been explored as a laboratory model for transient insomnia. The main characteristics of this effect are short total sleep time (TST) and rapid eye movement (REM) sleep, a lower sleep efficiency index, and longer REM sleep latency. Previous studies have reported that personality traits (such as trait anxiety) are a potential cause of the first-night effect and that the placebo effect is closely related to the anxiety levels of the subjects. To the best of our knowledge, there are no reports regarding the effects of a placebo on first-night sleep. This omission can be explained by the fact that the polysomnographic recordings obtained during the first night of a study are generally excluded from the analysis in order to avoid the inclusion of the first-night effect. In the present study, 8 male university students were subjected to polysomnographic examinations during drug-free, placebo-administration, and benzodiazepine-administration conditions in order to clarify the placebo effect on sleep during consecutive nights, particularly on the first night. The recordings for each condition were conducted for 4 consecutive nights. A placebo or 5 mg nitrazepam was administered at 2230 h using a double-blind crossover design, while no drug was administered during the drug-free condition. There was a 10-day interval between the examination of each condition. Polysomnographic recording was started at 2300 h and continued until the natural awakening of the subjects on the next morning. Subsequently, the subjects were requested to fill in a rating scale that is used to evaluate the subjective perception of sleep. An increase in stage-2 sleep associated with the first-night effect was observed on the first night during the drug-free and placebo-administration conditions. However, REM sleep reduction associated with the first-night effect was detected on the first night during the drug-free condition; this decrease in REM sleep was counteracted by the placebo during the placebo-administration condition. The nitrazepam, but not the placebo, decreased both slow-wave sleep (SWS) and REM sleep. The values for the tendency to fall asleep, feeling refreshed upon awakening in the morning, and the tension upon awakening in the morning were improved to a greater extent by the placebo and nitrazepam administrations than when no drug was administered. These results demonstrate the possibility that placebo administration may have a hypnotic/anxiolytic effect and may improve transient insomnia without causing SWS and REM sleep reductions.
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Affiliation(s)
- Masatomo Suetsugi
- Department of Neuropsychiatry, Yamaguchi University School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan.
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Feige B, Scaal S, Hornyak M, Gann H, Riemann D. Sleep electroencephalographic spectral power after withdrawal from alcohol in alcohol-dependent patients. Alcohol Clin Exp Res 2007; 31:19-27. [PMID: 17207097 DOI: 10.1111/j.1530-0277.2006.00260.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Dysfunctional hyperarousal is suspected to be a neurophysiological determinant of relapse in abstinent alcohol-dependent patients. In the present study, we used spectral power analysis of the sleep electroencephalographic (EEG) to quantify brain activity during sleep in patients during subacute withdrawal as well as in control subjects. Our hypothesis was that the subgroup of patients who relapsed within the 3 months to follow-up would exhibit-increased dysfunctional arousal manifested by higher-frequency (beta) EEG power during sleep. METHODS Twenty-six alcohol-dependent in-patients were examined with polysomnography over 2 nights 2 to 3 weeks after withdrawal. At the 3-month clinical follow-up assessment, 12 of them had relapsed and 14 abstained. The control group consisted of 23 healthy subjects similar to the patients with alcohol dependence in age and gender distribution. Spectral sleep EEG analysis was performed on both nights (adaptation and baseline) of all subjects. Logarithmic artifact-controlled spectral band power of sleep stage 2 and rapid eye movement (REM) sleep was analyzed for Group, Gender, and Age effects using multiple analyses of covariance. Three groups were compared with the Group factor: relapsers, abstainers, and controls. RESULTS Generally, both Group and Age effects were significant for the second, baseline night for the visually scored sleep parameters, while spectral EEG parameters showed significant differences in the adaptation night. In the adaptation night, a significant enhancement in the beta2 band (24-32 Hz) was seen in REM sleep in relapsers relative to both abstainers and controls. CONCLUSIONS The beta2 increase could be interpreted as a sign of dysfunctional arousal during REM sleep "unmasked" by the additional stressor of sleep environment adaptation. Its determinants are likely to be both premorbid and drinking history related.
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Affiliation(s)
- Bernd Feige
- Department of Psychiatry and Psychotherapy, University of Freiburg, Hauptstrasse 5, Freiburg 79104, Germany.
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Verhulst SL, Schrauwen N, De Backer WA, Desager KN. First night effect for polysomnographic data in children and adolescents with suspected sleep disordered breathing. Arch Dis Child 2006; 91:233-7. [PMID: 16352624 PMCID: PMC2065916 DOI: 10.1136/adc.2005.085365] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/28/2005] [Indexed: 11/04/2022]
Abstract
AIMS To assess the presence of a first night effect (FNE) in children and adolescents and to examine if a single night polysomnography (PSG) is sufficient for diagnosing obstructive sleep apnoea syndrome (OSAS). METHODS Prospective case study of 70 patients (group 1: 2-6 years, n = 22; group 2: 7-12 years, n = 32; group 3: 13-17 years, n = 16) referred for OSAS. Diagnostic criteria for OSAS: one or more of the following: (1) obstructive apnoea index (OAI) > or =1; (2) obstructive apnoea hypopnoea index (oAHI) > or =2; (3) SaO2 < or =89% in association with obstruction. RESULTS In all age groups, but mainly in the oldest children, REMS increased during the second night, mainly at the expense of stage 2 sleep. The first night PSG correctly identified OSAS in 86%, 91%, and 100% of the children for groups 1, 2, and 3 respectively. This represents 9% false negatives for OSAS when only the first night PSG was used. All cases missed had mild OSAS, except for one with oAHI >5 on night 2. There were also seven patients with OSAS on night 1 but with a normal PSG on night 2: all had oAHI <5. CONCLUSION There is a FNE in children and adolescents. A single night PSG is sufficient for diagnosing OSAS, but in cases with a suggestive history and examination and with a negative first night, a second night study might be advisable.
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Affiliation(s)
- S L Verhulst
- Department of Pediatrics, University Hospital of Antwerp, Belgium.
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Heitkemper M, Jarrett M, Burr R, Cain KC, Landis C, Lentz M, Poppe A. Subjective and objective sleep indices in women with irritable bowel syndrome. Neurogastroenterol Motil 2005; 17:523-30. [PMID: 16078941 DOI: 10.1111/j.1365-2982.2005.00700.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Patients with irritable bowel syndrome (IBS) commonly report sleep disturbances. This study examined self-report (Pittsburgh Sleep Quality Inventory) sleep quality and polysomnography (PSG) sleep variables in 18 women with mild-to-moderate IBS, 18 with severe IBS and 38 with age- and gender-matched controls. All women were studied on two consecutive nights in a sleep research laboratory where PSG data were collected. Retrospective and daily measures were obtained of self-reported sleep quality, psychological distress and gastrointestinal symptoms across one menstrual cycle. Self-report measures of psychological distress and sleep quality were significantly worse in the IBS-severe (IBS-S) group compared with controls. Rapid eye movement (REM) latency was higher in the two IBS groups on Night 1 than the control group (P = 0.06). Percentage time in REM was highest in the IBS-S on Night 2. All groups demonstrated greater sleep disruption on Night 1 (adaptation) when compared with Night 2. These results highlight the importance of considering the 'first-night effect' in those with IBS and the lack of concordance between self-report and objective indices of sleep in women with IBS.
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Affiliation(s)
- M Heitkemper
- Department of Biobehavioral Nursing and Health Systems, University of Washington, Seattle, WA 357266, USA.
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