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Copeland PV, Trotman ML, Kang HJ, McNeil CJ, Dalton BH. Vestibular control of standing balance following 24 h of sleep deprivation. Exp Brain Res 2024:10.1007/s00221-024-06918-4. [PMID: 39287791 DOI: 10.1007/s00221-024-06918-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 08/31/2024] [Indexed: 09/19/2024]
Abstract
Sleep deprivation alters cognitive and sensorimotor function, but its effects on the control of standing balance are inconclusive. The vestibular system is critical for standing balance, and is modified by sleep deprivation; however, how sleep deprivation affects vestibular-evoked balance responses is unknown. Thus, this study aimed to examine the effect of 24 h of sleep deprivation on the vestibular control of standing balance. During both a well-rested (i.e., control) and sleep deprivation condition, nine females completed two 90-s trials of bilateral, binaural stochastic electrical vestibular stimulation (EVS) and two 120-s trials of quiet stance on a force plate. Quiet stance performance was assessed by center of pressure displacement parameters. Mediolateral ground reaction force (ML force) and surface electromyography (EMG) of the right medial gastrocnemius (MG) were sampled simultaneously with the EVS signal to quantify vestibular control of balance within the frequency (gain and coherence) and time (cumulant density) domains. Twenty-four hours of sleep deprivation did not affect quiet stance performance. Sleep deprivation also had limited effect on EVS-MG EMG and EVS-ML Force coherence (less than control at 8-10.5 Hz, greater at ~ 16 Hz); however, gain of EVS-MG EMG (< 8, 11-24 Hz) and EVS-ML force (0.5-9 Hz) was greater for sleep deprivation than control. Sleep deprivation did not alter peak-to-peak amplitude of EVS-MG EMG (p = 0.51) or EVS-ML force (p = 0.06) cumulant density function responses. Despite no effect on quiet stance parameters, the observed increase in vestibular-evoked balance response gain suggests 24-h sleep deprivation may lead to greater sensitivity of the central nervous system when transforming vestibular-driven signals for standing balance control.
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Affiliation(s)
- Paige V Copeland
- School of Health and Exercise Sciences, Faculty of Health and Social Development, The University of British Columbia Okanagan, ART 360 (Arts Building), 1147 Research Road, Kelowna, BC, V1V 1V7, Canada
| | - Megan L Trotman
- School of Health and Rehabilitation Sciences, The University of Queensland, St Lucia, QLD, Australia
| | - Hogun J Kang
- School of Health and Exercise Sciences, Faculty of Health and Social Development, The University of British Columbia Okanagan, ART 360 (Arts Building), 1147 Research Road, Kelowna, BC, V1V 1V7, Canada
| | - Chris J McNeil
- School of Health and Exercise Sciences, Faculty of Health and Social Development, The University of British Columbia Okanagan, ART 360 (Arts Building), 1147 Research Road, Kelowna, BC, V1V 1V7, Canada
| | - Brian H Dalton
- School of Health and Exercise Sciences, Faculty of Health and Social Development, The University of British Columbia Okanagan, ART 360 (Arts Building), 1147 Research Road, Kelowna, BC, V1V 1V7, Canada.
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Jáuregui-Renaud K, García-Jacuinde DM, Bárcenas-Olvera SP, Gresty MA, Gutiérrez-Márquez A. Spatial anxiety contributes to the dizziness-related handicap of adults with peripheral vestibular disease. Front Neurol 2024; 15:1365745. [PMID: 38633539 PMCID: PMC11022853 DOI: 10.3389/fneur.2024.1365745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/18/2024] [Indexed: 04/19/2024] Open
Abstract
In subjects with peripheral vestibular disease and controls, we assessed: 1. The relationship between spatial anxiety and perceived stress, and 2. The combined contribution of spatial anxiety, spatial perspective-taking, and individual cofactors to dizziness-related handicap. 309 adults participated in the study (153 with and 156 without peripheral vestibular disease), including patients with bilateral vestibular deficiency, unilateral deficiency (evolution <3 or ≥3 months), Meniere's disease, and Benign Paroxysmal Positional Vertigo. Assessments included: general health, personal habits, spatial anxiety (3-domains), perceived stress, spatial perspective-taking, dizziness-related handicap (3-domains), unsteadiness, sleep quality, motion sickness susceptibility, trait anxiety/depression, state anxiety, depersonalization/derealization. After bivariate analyses, analysis of covariance was performed (p ≤ 0.05). Spatial anxiety was related to unsteadiness and perceived stress, with an inverse relationship with trait anxiety (ANCoVA, adjusted R2 = 0.27-0.30, F = 17.945-20.086, p < 0.00001). Variability on perspective-taking was related to vestibular disease, trait and state anxiety, motion sickness susceptibility, and age (ANCoVA, adjusted R2 = 0.18, F = 5.834, p < 0.00001). All domains of spatial anxiety contributed to the Physical domain of dizziness-related handicap, while the Navigation domain contributed to the Functional domain of handicap. Handicap variability was also related to unsteadiness, spatial perspective-taking, quality of sleep, and trait anxiety/depression (ANCoVA, adjusted R2 = 0.66, F = 39.07, p < 0.00001). Spatial anxiety is related to perceived stress in adults both with and without vestibular disease, subjects with trait anxiety rated lower on spatial anxiety. State anxiety and acute stress could be helpful for recovery after peripheral vestibular lesion. Spatial anxiety and perspective-taking contribute to the Physical and Functional domains of dizziness-related handicap, possibly because it discourages behavior beneficial to adaptation.
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Affiliation(s)
- Kathrine Jáuregui-Renaud
- Unidad de Investigación Médica en Otoneurología, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Dulce Maria García-Jacuinde
- Departamento de Audiología y Otoneurología, Hospital General del Centro Médico Nacional “La Raza”, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Simón Pedro Bárcenas-Olvera
- Departamento de Audiología y Otoneurología, Hospital General del Centro Médico Nacional “La Raza”, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Michael A. Gresty
- Division of Brain Sciences, Imperial College London, Charing Cross Hospital, London, United Kingdom
| | - Aralia Gutiérrez-Márquez
- Departamento de Audiología y Otoneurología, Hospital General del Centro Médico Nacional “La Raza”, Instituto Mexicano del Seguro Social, Mexico City, Mexico
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Jarosz M, Pawlak K, Jarosz W, Wiernicka M, Barinow-Wojewódzki A, Stemplewski R. The effect of surgical repair of the chest on postural stability among patients with pectus excavatum. Sci Rep 2024; 14:45. [PMID: 38167457 PMCID: PMC10762140 DOI: 10.1038/s41598-023-50645-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024] Open
Abstract
Pectus excavatum is the most encountered of chest wall deformities. It may produce respiratory and cardiovascular symptoms, hence surgical repair of this defect is performed. The procedure involving the insertion of metal bars under the sternum (the Nuss procedure) usually brings significant improvement to patients. However, the effect of the repair on the postural stability of patients has not been studied so far. To investigate the problem of patients' stability in the postoperative period male patients with pectus excavatum (n = 21) and healthy controls (n = 22) were included in the study. Using posturography methods, we showed a negative impact of the pectus excavatum repair surgery on patients' postural stability in the first postoperative phase. The centre of pressure displacement parameters used to measure postural stability were lower after the repair for both, the frontal and sagittal plane as well as for the velocity of displacements in the sagittal plane in the double stance with eyes open. Poorer postural stability was also found in patients with pectus excavatum when compared to healthy controls. Our findings may be useful for functional monitoring in the evaluation and surgical management of pectus excavatum patients and also when designing the rehabilitation of patients undergoing the Nuss procedure.
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Affiliation(s)
- Maria Jarosz
- Doctoral School, Poznań University of Physical Education, 27/39 Królowej Jadwigi Street, 61-871, Poznan, Poland.
| | - Krystian Pawlak
- Wielkopolska Center of Pulmonology and Thoracic Surgery, 62 Szamarzewskiego Street, 60-569, Poznan, Poland
| | - Wojciech Jarosz
- Department of Medical Biology, Poznań University of Physical Education, 27/39 Królowej Jadwigi Street, 61-871, Poznan, Poland.
| | - Marzena Wiernicka
- Department of Musculoskeletal Rehabilitation, Poznań University of Physical Education, 27/39 Królowej Jadwigi Street, 61-871, Poznan, Poland
| | | | - Rafał Stemplewski
- Department of Digital Technologies in Physical Activity, Poznań University of Physical Education, 27/39 Królowej Jadwigi Street, 61-871, Poznan, Poland
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Stemplewski R, Ciążyńska J, Cyma-Wejchenig M, Maciaszek J. The effect of sleep deprivation on postural stability among physically active young adults. Sci Rep 2023; 13:17477. [PMID: 37838825 PMCID: PMC10576790 DOI: 10.1038/s41598-023-44790-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 10/12/2023] [Indexed: 10/16/2023] Open
Abstract
The study aimed to evaluate the effect of sleep deprivation on postural stability among physically active young adults. The study involved 22 physical education students. Average velocities and spatial distribution of the center of pressure displacements were taken as indicators of postural stability (double and one-leg standing). Two-way ANOVA with two factors of repeated measurements-"session" (control-experimental) and "daytime" (evening-morning)-was used. For indicators of the spatial distribution of the center of pressure in double stance with eyes open and eyes closed, and for average velocities for measurements with eyes closed, statistically significant interaction effects were found (at least p < 0.01, ƞ2 > 0.36, power statistics > 0.90) with the general tendency of higher results in the morning in the session with sleep deprivation than in the control session. In one-leg standing, an increase of average velocities was observed in the control session, and no differences in the session with sleep deprivation (interaction effect: at least p < 0.01, ƞ2 > 0.37, power statistics > 0.90). Besides spatial distribution indicators in double stance, there were no statistical differences between evening-morning tests in the session with sleep deprivation. Despite significant interaction effects, only the results of spatial distribution indicators in double stance were higher in the morning than in the evening in the session with sleep deprivation. So, no clear decline in postural stability after sleep deprivation was observed. This may suggest that sleep deprivation prevents natural regeneration rather than significantly worsening postural stability among physically active adults. It's possible that systematic physical activity might be one of the factors decreasing the risk of accidents among people exposed to sleep deprivation.
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Affiliation(s)
- Rafał Stemplewski
- Department of Digital Technologies in Physical Activity, Poznań University of Physical Education, Poznań, Poland.
| | - Julia Ciążyńska
- Department of Physical Activity and Health Promotion Science, Poznań University of Physical Education, Poznań, Poland
| | - Magdalena Cyma-Wejchenig
- Department of Digital Technologies in Physical Activity, Poznań University of Physical Education, Poznań, Poland
| | - Janusz Maciaszek
- Department of Physical Activity and Health Promotion Science, Poznań University of Physical Education, Poznań, Poland
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Soares de Almeida Ciquinato D, Lozza de Moraes Marchiori L, Aparecida Bazoni J, Eumann Mesas A, Alexandre da Silva R. Association between Objective and Subjective Sleep Parameters with Postural Control Responses among Brazilian Schoolteachers. Sleep Sci 2023; 16:131-138. [PMID: 37425976 PMCID: PMC10325837 DOI: 10.1055/s-0043-1770800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023] Open
Abstract
Objective To investigate the impact of sleep quality on postural control in teachers. Methods Cross-sectional study with 41 schoolteachers (mean age 45.7 ± 10.4 years). Sleep quality was assessed in two ways: objectively (through actigraphy), and subjectively (through the Pittsburgh Sleep Quality Index). Postural control was assessed in an upright posture during 3 trials of 30s (bipedal and semitandem stances in rigid and foam surfaces with eyes open) with a period of rest across trials, on a force platform, based in the center of pressure measurements in the anteroposterior and mediolateral directions. Results The prevalence of poor sleep quality in this study sample was 53.7% ( n = 22). No differences were found between Poor and Good sleep in the posturographic parameters (p > 0.05). Although, there was moderate correlation between postural control in the semitandem stance and subjective sleep efficiency for center of pressure area (rs = -0.424; p = 0.006) and amplitude in anteroposterior direction (rs = -0.386; p = 0.013). Discussion There is correlation between poor sleep quality and postural control in schoolteachers, as sleep efficiency decreases, postural sway increases. Poor sleep quality and postural control were investigated in other populations, but not in teachers. Several factors such as work overload, insufficient time for physical activities, among others, can contribute to a worse perception of sleep quality, as well as deterioration in postural control. Further studies with larger populations are needed to confirm these findings.
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Affiliation(s)
- Daiane Soares de Almeida Ciquinato
- Health Science Department, Doctoral and Master's Programs in Rehabilitation Sciences at UEL/UNOPAR, Pitagoras University-UNOPAR, Londrina, Parana, Brazil
| | - Luciana Lozza de Moraes Marchiori
- Health Science Department, Doctoral and Master's Programs in Rehabilitation Sciences at UEL/UNOPAR, Pitagoras University-UNOPAR, Londrina, Parana, Brazil
- Health Department, Interdisciplinary Laboratory for Intervention in Health Promotion, Cesumar University (Unicesumar), Maringa, Parana, Brazil
| | - Jessica Aparecida Bazoni
- Health Science Department, Doctoral and Master's Programs in Rehabilitation Sciences at UEL/UNOPAR, Pitagoras University-UNOPAR, Londrina, Parana, Brazil
| | - Arthur Eumann Mesas
- Public Health Department, Postgraduated Program in Public Health, State University of Londrina (UEL), Londrina, Parana, Brazil
| | - Rubens Alexandre da Silva
- Health Science Department, Doctoral and Master's Programs in Rehabilitation Sciences at UEL/UNOPAR, Pitagoras University-UNOPAR, Londrina, Parana, Brazil
- Department of Health Sciences, Centre intersectoriel en santé durable, Laboratoire de recherche BioNR, Université du Québec à Chicoutimi (UQAC), Cupht, Saguenay, Québec, Canada
- Specialized Geriatric Services, Hôpital de La Baie, Research Centre on Health, CIUSSS du Saguenay-Lac-Saint-Jean, Chicoutimi, Quebec, Canada
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Castor CGM, Santos TRT, Souza TR, Araújo PA, Okai-Nóbrega LA, Ocarino JM, Silva A, Fonseca ST. Effect of sleep deprivation on postural control and dynamic stability in healthy young adults. Neurosci Lett 2023; 797:137055. [PMID: 36610588 DOI: 10.1016/j.neulet.2023.137055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023]
Abstract
BACKGROUND Postural control results from non-linear interactions of multiple neuromusculoskeletal elements and contextual factors. The use of non-linear analyses that consider the temporal evolution of postural adjustments, such as sample entropy, could inform about the changes in postural control due to contextual disturbances such as sleep deprivation. RESEARCH QUESTION What are the effects of sleep deprivation on static postural control and dynamic stability in healthy young adults? METHODS A quasi-experimental study was performed with 17 healthy young males submitted to 24 h of monitored sleep deprivation. The postural control was measured using sample entropy, area, and total average velocity of the center of pressure on a force platform. The dynamic stability was measured using the Modified Star Excursion Balance Test (SEBTm) composite score for each lower limb. Repeated-measures analysis of variance (baseline × 12 h × 15 h × 18 h × 21 h × 24 h of sleep deprivation) verified the effect of sleep deprivation in the postural control variables. Paired t-test compared the composite score of the SEBTm between baseline and 24 h sleep deprivation. RESULTS Sample entropy decreased after 18 h of sleep deprivation (p = 0.032) and 24 h of sleep deprivation (p = 0.001). Despite the significant main effect for the area (p = 0.012) and speed (p = 0.007) of the center of pressure, no pairwise differences were identified in the post hoc analysis. The non-dominant lower limb SEBTm composite score was reduced after 24 h of sleep deprivation (p = 0.033), and no difference was observed in the dominant limb. SIGNIFICANCE Sleep deprivation reduced the adaptability in static postural control and dynamic stability of the non-dominant lower limb of healthy young male adults. Sample entropy seemed more sensitive to capture the effects of sleep deprivation than the classical postural control variables.
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Affiliation(s)
- Camila G M Castor
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thiago R T Santos
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Faculty of Physical Education and Physical Therapy, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - Thales R Souza
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Priscila A Araújo
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Liria A Okai-Nóbrega
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Juliana M Ocarino
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Andressa Silva
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio T Fonseca
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Altena E, Buguet E, Higginson C, Lee E, Douglass A, Spitale N, Robillard R. Vestibular symptoms are related to the proportion of REM sleep in people with sleep complaints: A preliminary report. J Vestib Res 2023; 33:165-172. [PMID: 37066952 PMCID: PMC10357186 DOI: 10.3233/ves-220113] [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] [Indexed: 04/18/2023]
Abstract
OBJECTIVE/BACKGROUND Though sleep problems (apnea, insomnia) and related daytime symptoms (fatigue, anxiety, depression) have been associated with vestibular problems (falls, dizziness), it is not well known which particular sleep features relate to vestibular problems. We thus assessed symptoms of vestibular problems in patients visiting a sleep clinic and evaluated how they were associated with objective sleep parameters derived from polysomnography and relevant daytime symptoms. PATIENTS/METHODS The polysomnography data of thirty-one patients (61% female, between 20 and 79 years of age) who were referred for clinical sleep assessment was collated with subjective measures of symptoms linked to vestibular problems (rated on the Situational Characteristics Questionnaire), as well as fatigue, anxiety and depression symptoms. Multiple linear regression was used to identify factors associated with vestibular symptoms, including analyses adjusted for age, sex, medication use and total sleep time. RESULTS A higher percentage of REM sleep and more severe anxiety symptoms were independently associated with more severe vestibular symptoms, which survived adjusted analyses. Other sleep stages, as well as as sleep efficiency, apnea-hypopnea index and oxygen saturation were not significantly related to vestibular symptoms. CONCLUSIONS These results point at vestibular symptoms as possible important and overlooked correlates of variations in sleep architecture in individuals with sleep complaints. Though replication is needed to confirm findings from this limited sample, the results highlight the importance of assessing vestibular symptoms in people with sleep complaints. In particular, further investigations will need to address the potential implication of REM sleep for vestibular functions and the directionality of this relation.
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Affiliation(s)
| | - Estelle Buguet
- Université de Bordeaux, CNRS UMR 5287, INCIA, Bordeaux, France
| | - Caitlin Higginson
- Sleep Research Unit, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, Canada
- Sleep Disorders Clinic, Royal Ottawa Mental Health Centre, Ottawa, Canada
| | - Elliott Lee
- Sleep Research Unit, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, Canada
- Sleep Disorders Clinic, Royal Ottawa Mental Health Centre, Ottawa, Canada
| | - Alan Douglass
- Sleep Research Unit, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, Canada
- Sleep Disorders Clinic, Royal Ottawa Mental Health Centre, Ottawa, Canada
| | - Naomi Spitale
- Sleep Research Unit, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, Canada
- Sleep Disorders Clinic, Royal Ottawa Mental Health Centre, Ottawa, Canada
| | - Rebecca Robillard
- Sleep Research Unit, Institute of Mental Health Research at the Royal, University of Ottawa, Ottawa, Canada
- School of Psychology, University of Ottawa, Ottawa, Canada
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Izadi M, Thomas E, Thomas AC, Bellafiore M. The effect of time-of-day and sleep deprivation on postural control: A systematic review. Gait Posture 2022; 97:94-103. [PMID: 35917703 DOI: 10.1016/j.gaitpost.2022.07.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 06/24/2022] [Accepted: 07/20/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Postural control (PC) can be affected by circadian rhythm and sleep deprivation, whereby it has been reported the result of PC measurement in clinical and experimental situations can be influenced by both factors. It has been suggested sleepiness can result in deficiency in PC, which in turn can lead to occupational accidents and subsequent injuries. This is while no study critically reviews or summarizes findings surrounding this topic in the literature. RESEARCH QUESTION Is there any significant effect of sleep deprivation and circadian rhythm on PC variables among healthy individuals? METHODS PubMed, Web of Science, Scopus, and Embase were used to detect relevant studies. Only studies that examined the effect of time of day and/or sleep loss on PC among healthy individuals were included in this systematic review. RESULTS Forty-nine studies were included based on the inclusion criteria. Both circadian rhythm and sleep loss had a significant effect on PC, whereas there are inconsistent findings for optimal postural control regarding time of day. In terms of sleep deprivation, all investigations indicated that sleep loss deteriorates PC. SIGNIFICANCE The current systematic review represents a significant effect of circadian rhythm and sleep deprivation on PC, whereby it is suggested that clinicians and researchers consider these factors when measuring PC since it may affect the result of research and clinical test. Moreover, PC may be worsened through sleeplessness; however, some studies revealed there is no linear relationship between time of wakefulness and deteriorating PC due to the influence of circadian rhythm. Hence, while PC, as an objective tool, can help to detect those who are sleep deprived, which in turn can lead to prevent possible musculoskeletal injuries, further studies are needed to reveal more understanding about the effect of sleep loss and circadian rhythm on PC.
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Affiliation(s)
- Mohammad Izadi
- Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy.
| | - Ewan Thomas
- Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy
| | - Abbey C Thomas
- Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Marianna Bellafiore
- Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy
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Picard-Deland C, Allaire MA, Nielsen T. Postural balance in frequent lucid dreamers: a replication attempt. Sleep 2022; 45:6581922. [PMID: 35522289 PMCID: PMC9272189 DOI: 10.1093/sleep/zsac105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 04/15/2022] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study Objectives
Early research suggests that the vestibular system is implicated in lucid dreaming, e.g. frequent lucid dreamers outperform others on static balance tasks. Furthermore, gravity-themed dreams, such as flying dreams, frequently accompany lucid dreaming. Nonetheless, studies are scarce.
Methods
We attempted to: (1) replicate previous findings using more sensitive static balance measures and (2) extend these findings by examining relationships with dreamed gravity imagery more generally. 131 participants (80 F; Mage=24.1 ± 4.1 yrs) estimated lucid dreaming frequency then completed a 5-day home log with ratings for dream lucidity awareness, control, and gravity sensations (flying, falling). They then performed balance tasks on a sensitive force plate, i.e. standing on one or both feet, with eyes open or closed. Center of pressure (CoP) Displacement and CoP Velocity on each trial measured postural stability.
Results
Findings partially support the claim of a vestibular contribution to lucid dreaming. Frequent lucid dreamers displayed better balance (lower CoP Velocity) than did other participants on some trials and lucid dreaming frequency was globally correlated with better balance (lower CoP Velocity). Lower CoP Velocity was related to flying sensations in men’s dreams and with more dream control in women’s dreams. However, body height—possibly due to its relationship to sex—and levels of sleepiness confound some of these effects.
Conclusion
While findings only provide a partial replication of previous work, they nonetheless support an emerging view that the vestibular system underlies basic attributes of bodily self-consciousness, such as feelings of self-agency and self-location, whether such consciousness occurs during wakefulness or dreaming.
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Affiliation(s)
- Claudia Picard-Deland
- Dream & Nightmare Laboratory, Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM – Hôpital du Sacré-Coeur de Montréal, Montréal, Québec, Canada
- Department of Neuroscience, Université de Montréal, Montréal, Québec, Canada
| | - Max-Antoine Allaire
- Dream & Nightmare Laboratory, Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM – Hôpital du Sacré-Coeur de Montréal, Montréal, Québec, Canada
- Department of Psychology, Université de Montréal, Montréal, Québec, Canada
| | - Tore Nielsen
- Corresponding author. Tore Nielsen, Dream & Nightmare Laboratory, Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM—Hôpital du Sacré-Cœur de Montréal, 5400 Gouin Blvd West, Montreal, Quebec, Canada H4J 1C5.
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Tanwar T, Veqar Z. Association Between Sleep Parameters and Postural Control: A Literature Review. SLEEP MEDICINE RESEARCH 2022. [DOI: 10.17241/smr.2022.01235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background and Objective The purpose of the review was to explore the association between sleep parameters and postural control.Methods The PubMed, Science Direct, and EBSCO were searched using the keywords ‘sleep’ including either sleep quality, sleep deprivation, poor sleep quality; and ‘postural control’ including either dynamic balance, static balance, postural balance, and balance control. Related studies published till December 2017 were selected.Results Acute sleep deprivation resulted in an impairment in postural control. Chronic sleep deprivation and postural control were also found to be related in a similar way to that of total sleep deprivation, thus affecting postural control negatively. Time of day was found to influence the postural control such that the postural control was better in the morning than in the latter part of the day. A study of the impact of aging on the effects of sleep deprivation on postural control revealed that loss of sleep had a more disturbing effect on postural control in the olderadult group than in younger participants, thus indicating a high risk of fall among the elderly.Conclusions Despite various limitations and methodological differences, this review has identified a negative influence on postural control due to impaired sleep in a wide range of populations, indicating the need for a more focused approach to sleep when assessing and measuring postural control.
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Wang H, Tian Y, Wang Y, He Q, Qiu J, Feng T, Chen H, Lei X. Distinct neural responses of morningness and eveningness chronotype to homeostatic sleep pressure revealed by resting-state functional magnetic resonance imaging. CNS Neurosci Ther 2022; 28:1439-1446. [PMID: 35699408 PMCID: PMC9344083 DOI: 10.1111/cns.13887] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 05/08/2022] [Accepted: 05/13/2022] [Indexed: 11/27/2022] Open
Abstract
Background Chronotype is an appropriate variable to investigate sleep homeostatic and circadian rhythm. Based on functional MRI, the resting‐state functional connectivity (rsFC) of insula‐angular decrease with the increase in homeostatic sleep pressure (HSP). However, the distinct neural response of different chronotype remained to be clarified. Therefore, we investigated how HSP influenced insular‐angular neural interaction of different chronotype. Methods 64 morningness‐chronotype (MCPs) and 128 eveningness‐chronotype participants (ECPs) received resting‐state functional MRI (rsfMRI) scan. HSP was divided into three levels (Low, Medium, and High) based on the elapsed time awake. Insular‐angular rsFC was calculated for MCPs and ECPs on each HSP. Results As the levels of HSP increased, the negative rsFC between right insular and bilateral angular increased in MCPs while decreased in ECPs. Specifically, ECPs compared with MCPs showed lower rsFC at medium levels of HSP, but higher rsFC at high levels of HSP. In addition, ECPs compared with MCPs exhibited lower rsFC between right insular and right angular at low levels of HSP. Conclusion The distinct modes of rsFC was found in different chronotype in response to HSP. The results provided the foundation and evidence for investigating the processes of circadian rhythm and sleep homeostatic.
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Affiliation(s)
- Haien Wang
- Sleep and NeuroImaging Center, Faculty of Psychology, Southwest University, Chongqing, China.,Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Yun Tian
- Sleep and NeuroImaging Center, Faculty of Psychology, Southwest University, Chongqing, China.,Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Yulin Wang
- Sleep and NeuroImaging Center, Faculty of Psychology, Southwest University, Chongqing, China.,Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Qinghua He
- Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Jiang Qiu
- Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Tingyong Feng
- Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Hong Chen
- Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
| | - Xu Lei
- Sleep and NeuroImaging Center, Faculty of Psychology, Southwest University, Chongqing, China.,Key Laboratory of Cognition and Personality (Southwest University), Ministry of Education, Chongqing, China
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12
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Umemura GS, Furtado F, dos Santos FC, Gonçalves BDSB, Forner-Cordero A. Is Balance Control Affected by Sleep Deprivation? A Systematic Review of the Impact of Sleep on the Control of Balance. Front Neurosci 2022; 16:779086. [PMID: 35651634 PMCID: PMC9150847 DOI: 10.3389/fnins.2022.779086] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 04/19/2022] [Indexed: 11/29/2022] Open
Abstract
Background Sleep is a complex physiological function that should be addressed from different perspectives and consider the circadian rhythm. Sleep deprivation, either acute or chronic, negatively affects several functions, including motor control. Balance control is essential in several daily life activities and balance problems are related to falls. Research Question This review focuses on how sleep conditions impact balance control. Methods Systematic literature review according to PRISMA guidelines. Results The literature provided strong evidence that acute sleep deprivation impairs postural control. Chronic sleep deprivation as well as low sleep quality had similar effects, although there is a lower number of works addressing this issue. Furthermore, time awake worsens postural controls and it can be used to detect sleepiness and fatigue. The sleep deprivation showed a stronger negative effect on postural control when removing the visual information (eyes closed) than when reducing proprioceptive feedback (soft surface). There is scarce literature about the effects of chronotype, circadian patterns and chronic sleep deprivation, a frequent problem, on balance control; however they consistently indicate that there is an relationship between them. Most of the studies only consider one-night (acute) sleep deprivation without monitoring prior sleep conditions and the circadian rhythm phase of the participants. However, a few studies indicated that these factors must be considered. Significance These results suggest that the sleep conditions of a subject should be considered for several days prior to balance control tests. Therefore, we propose a revision of current postural measurement protocols to include sleep assessment, such as sleep quality questionnaires or actimetry, and to consider the circadian rhythm of the participants to plan the hour of the tests.
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Affiliation(s)
- Guilherme Silva Umemura
- Biomechatronics Laboratory, Department of Mechatronics, Escola Politécnica, University of São Paulo, São Paulo, Brazil
| | - Fabianne Furtado
- Biomechatronics Laboratory, Department of Mechatronics, Escola Politécnica, University of São Paulo, São Paulo, Brazil
- Federal Institute of Education, Science and Technology of Southeast of Minas Gerais, Barbacena, Brazil
| | - Fabia Camile dos Santos
- Biomechatronics Laboratory, Department of Mechatronics, Escola Politécnica, University of São Paulo, São Paulo, Brazil
| | | | - Arturo Forner-Cordero
- Biomechatronics Laboratory, Department of Mechatronics, Escola Politécnica, University of São Paulo, São Paulo, Brazil
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13
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Griggs S, Harper A, Hickman RL. A systematic review of sleep deprivation and neurobehavioral function in young adults. Appl Nurs Res 2022; 63:151552. [PMID: 35034695 PMCID: PMC8766996 DOI: 10.1016/j.apnr.2021.151552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 10/04/2021] [Accepted: 12/06/2021] [Indexed: 02/03/2023]
Abstract
AIM To examine the effect of sleep deprivation (total and partial) on neurobehavioral function compared to a healthy sleep opportunity (7-9 h) in young adults 18-30 years. BACKGROUND More than one-third of young adults are sleep deprived, which negatively affects a range of neurobehavioral functions, including psychomotor vigilance performance (cognitive), affect, and daytime sleepiness. METHODS A systematic review of randomized controlled trials (RCTs) on sleep deprivation and neurobehavioral function. Multiple electronic databases (Cochrane Central Registry of Controlled Trials [CENTRAL], PubMed, PsycINFO, CINAHL, and Web of Science) were searched for relevant RCTs published in English from the establishment of each database to December 31, 2020. RESULTS Nineteen RCTs were selected (N = 766, mean age = 23.7 ± 3.1 years; 44.8% female). Seven were between-person (5 were parallel-group designs and 2 had multiple arms), and 12 were within-person designs (9 were cross over and 3 used a Latin square approach). Total sleep deprivation had the strongest detrimental effect on psychomotor vigilance performance, with the largest effects on vigilance tasks in young adults in the included studies. CONCLUSION Acute sleep deprivation degrades multiple dimensions of neurobehavioral function including psychomotor vigilance performance, affect, and daytime sleepiness in young adults. The effect of chronic sleep deprivation on the developing brain and associated neurobehavioral functions in young adults remains unclear.
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Affiliation(s)
- Stephanie Griggs
- Case Western Reserve University, Frances Payne Bolton School of Nursing, Cleveland, Ohio, USA 44106
| | - Alison Harper
- Case Western Reserve University, Frances Payne Bolton School of Nursing, Department of Anthropology, Cleveland, Ohio, USA 44106
| | - Ronald L. Hickman
- Ruth M. Anderson Endowed Professor of Nursing and Associate Dean for Research Case Western Reserve University, Frances Payne Bolton School of Nursing, Cleveland, OH, USA 44106
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14
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Observational and genetic evidence highlight the association of human sleep behaviors with the incidence of fracture. Commun Biol 2021; 4:1339. [PMID: 34837057 PMCID: PMC8626439 DOI: 10.1038/s42003-021-02861-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 11/05/2021] [Indexed: 12/19/2022] Open
Abstract
We combined conventional evidence from longitudinal data in UK Biobank and genetic evidence from Mendelian randomization (MR) approach to infer the causality between sleep behaviors and fracture risk. We found that participants with insomnia showed 6.4% higher risk of fracture (hazard ratio [HR] = 1.064, 95% CI = 1.038-1.090, P = 7.84 × 10-7), falls and bone mineral density (BMD) mediated 24.6% and 10.6% of the intermediary effect; the MR analyses provided the consistent evidence. A U-shape relationship was observed between sleep duration and fracture risk (P < 0.001) with the lowest risk at sleeping 7-8 h per day. The excessive daytime sleepiness and "evening" chronotype were associated with fracture risk in observational study, but the association between chronotype and fracture did not show in MR analyses. We further generated a sleep risk score (SRS) with potential risk factors (i.e., insomnia, sleep duration, chronotype, and daytime sleepiness). We found that the risk of fracture increased with an increasing SRS (HR = 1.087, 95% CI = 1.065-1.111, P = 1.27 × 10-14). Moreover, 17.4% of the fracture cases would be removed if all participants exhibited a healthy sleep pattern. In conclusion, insomnia had a causal effect on fracture, falls had a larger intermediary effect than BMD in this association. Individuals with fracture risk could benefit from the intervention on unhealthy sleep pattern.
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15
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Differences in the Effect of Sleep Deprivation on the Postural Stability among Men and Women. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18073796. [PMID: 33916500 PMCID: PMC8038654 DOI: 10.3390/ijerph18073796] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 03/31/2021] [Accepted: 04/02/2021] [Indexed: 01/11/2023]
Abstract
Objective: Sleepiness caused by sleep deprivation may increase the risk of injuries and damages during physical activity. Individual data so far indicate a generally better static postural stability of women regardless of sleeping conditions. The main aim of this study was to assess the impact of sleep deprivation on postural stability according to gender after 24 h of sleep deprivation. Methods: Participants included 83 students (36 men and 47 women). Postural stability was measured with eyes open and closed eyes before and after sleep deprivation. Data from posturographic platform were used to assess postural stability objectively. Results: The type of test determined the size of observed changes in postural stability. The data suggest that women are better able to cope with the effects of sleep deprivation than men. Conclusion: Postural control system is very important in sport and in physically active people. The results show that men are more sensitive to sleep deprivation than women because they had higher COP (center of pressure) values in tests. Less postural stability of the body due to sleep deprivation indicates a higher risk of injury during physical activity.
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16
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Souissi N, Zouita A, Abedelmalek S, Trabelsi K, Clark CCT, Dziri K, Chtourou H, Souissi N. Partial sleep restriction impairs static postural control in elite judo athletes. BIOL RHYTHM RES 2020. [DOI: 10.1080/09291016.2020.1843254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Nafaa Souissi
- Activité Physique, Sport et Santé, UR18JS01, Observatoire National du Sport, Tunis, Tunisia
| | - Amira Zouita
- Biomechanics Laboratory, National Institute of Orthopedics “M.T. Kassab”, Tunis, Tunisia
| | - Salma Abedelmalek
- Faculty of Medicine, Laboratory of Physiology and Functional Exploration, Sousse, Tunisia
- Research Unit, Departement of Sport Science and Physical Activity, Colfoote of Education, University of Ha’il, Ha'il, Arabi Saudi Kingdom
| | - Khaled Trabelsi
- High Institute of Sport and Physical Education, University of Sfax, Sfax, Tunisia
- Research Laboratory “Education, Motricité, Sport etSanté”, EM2S, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Cain C. T. Clark
- Centre for Intelligent Healthcare, Coventry University, Coventry, UK
| | - Katherine Dziri
- Biomechanics Laboratory, National Institute of Orthopedics “M.T. Kassab”, Tunis, Tunisia
| | - Hamdi Chtourou
- Activité Physique, Sport et Santé, UR18JS01, Observatoire National du Sport, Tunis, Tunisia
- High Institute of Sport and Physical Education, University of Sfax, Sfax, Tunisia
| | - Nizar Souissi
- Activité Physique, Sport et Santé, UR18JS01, Observatoire National du Sport, Tunis, Tunisia
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17
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Mantua J, Bessey AF, Ritland BM, Naylor JA, Chabuz R, McKeon AB, Capaldi VF, Sowden WJ. Sleep loss is related to unstable stationary balance in U.S. Army soldiers in an operationally-relevant context. Sleep Med 2020; 73:130-134. [DOI: 10.1016/j.sleep.2020.04.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 04/08/2020] [Accepted: 04/11/2020] [Indexed: 01/23/2023]
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18
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Micarelli A, Viziano A, Lanzillotta A, Giorgino FM, Pisano C, Ruvolo G, Alessandrini M. Postural control abnormalities related to sleep deprivation in patients with Marfan Syndrome. J Vestib Res 2019; 29:261-269. [PMID: 31707379 DOI: 10.3233/ves-190684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Marfan syndrome (MFS) is a rare autosomal dominant connective tissue disorder affecting virtually every organ. Sleep disturbances, associated to high collapsibility in upper airways, are common in MFS; daytime sleepiness could lead to reduction in attention and motor coordination, with detrimental effects on balance. OBJECTIVE To evaluate otoneurological function in MFS patients, compared to healthy subjects, and to investigate possible correlations with sleep deprivation extent. METHODS Forty-one MFS patients underwent a thorough otoneurological examination, video Head Impulse Test (vHIT), and static posturography. Sleep parameters were recorded by home monitoring. Daytime sleepiness and dizziness-related handicap were screened by means of Dizziness Handicap Inventory (DHI) and Epworth Sleepiness Scale (ESS). Results were compared with 49 healthy controls (HC). RESULTS DHI and ESS scores were increased in MFS patients (p < 0,01). vHIT scores showed no between-group effect. Classical (surface and length) and frequency-domain posturographic parameters were significantly increased in MFS with respect to HC (p < 0,01). A positive correlation was found between ESS scores and posturographic parameters in MFS patients. CONCLUSIONS An impaired postural control, related to the extent of sleep deprivation, was found in MFS patients. Such results could advocate for screening and treating sleep deprivation and balance dysfunctions in MFS patients.
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Affiliation(s)
- Alessandro Micarelli
- Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, 'Tor Vergata' University, Rome, Italy.,ITER Center for Balance and Rehabilitation Research (ICBRR), Rome, Italy
| | - Andrea Viziano
- Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, 'Tor Vergata' University, Rome, Italy
| | - Alessia Lanzillotta
- Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, 'Tor Vergata' University, Rome, Italy
| | - Federica Maria Giorgino
- Department of Experimental Medicine, Respiratory Unit, 'Tor Vergata' University, Rome, Italy
| | - Calogera Pisano
- Department of Surgery Sciences, Cardiac Surgery Unit, 'Tor Vergata' University, Rome, Italy
| | - Giovanni Ruvolo
- Department of Surgery Sciences, Cardiac Surgery Unit, 'Tor Vergata' University, Rome, Italy
| | - Marco Alessandrini
- Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, 'Tor Vergata' University, Rome, Italy
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19
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Montesinos L, Castaldo R, Cappuccio FP, Pecchia L. Day-to-day variations in sleep quality affect standing balance in healthy adults. Sci Rep 2018; 8:17504. [PMID: 30504839 PMCID: PMC6269497 DOI: 10.1038/s41598-018-36053-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 11/10/2018] [Indexed: 11/23/2022] Open
Abstract
Acute sleep deprivation is known to affect human balance and posture control. However, the effects of variations in sleep quality and pattern over consecutive days have received less attention. This study investigated the associations between day-to-day variations in sleep quality and standing balance in healthy subjects. Twenty volunteers (12 females and 8 males; age: 28.8 ± 5.7 years, body mass index: 23.4 ± 3.4 kg/m2, resting heart rate: 63.1 ± 8.7 bpm) with no history of sleep disorders or balance impairments participated in the study. Sleep and balance were assessed over two consecutive days. Sleep quality variations were assessed using sleep diary, actigraphy and heart rate variability (HRV) measures. Sleep was monitored at home, using an unobtrusive wearable device. Balance was assessed in a gait lab using foot centre of pressure (COP) displacement during quiet standing. Subjects with a day-to-day deterioration in sleep quantity and quality (i.e., decreased duration and increased fragmentation, increased nocturnal activity and decreased HRV) exhibited significant changes in balance (i.e., larger COP area, amplitude and standard deviation). Conversely, subjects with no significant alterations in sleep quantity and quality showed no significant changes in COP displacements. These results confirmed our hypothesis that changes in sleep quality and pattern over consecutive days may affect balance.
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Affiliation(s)
- Luis Montesinos
- School of Engineering, University of Warwick, Coventry, United Kingdom
- Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Mexico City, Mexico
| | - Rossana Castaldo
- School of Engineering, University of Warwick, Coventry, United Kingdom
- Institute of Advanced Study, University of Warwick, Coventry, United Kingdom
| | - Francesco P Cappuccio
- Warwick Medical School, University of Warwick, Coventry, United Kingdom
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, United Kingdom
| | - Leandro Pecchia
- School of Engineering, University of Warwick, Coventry, United Kingdom.
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20
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Swanson CM, Kohrt WM, Buxton OM, Everson CA, Wright KP, Orwoll ES, Shea SA. The importance of the circadian system & sleep for bone health. Metabolism 2018; 84:28-43. [PMID: 29229227 PMCID: PMC5994176 DOI: 10.1016/j.metabol.2017.12.002] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/28/2017] [Accepted: 12/01/2017] [Indexed: 01/01/2023]
Abstract
Adequate sleep timed appropriately during the circadian night is important for numerous biological processes and systems. New evidence suggests that both sleep timing and duration may be important for optimal bone health as well. This review examines the diurnal variation of bone turnover markers (BTMs) and the importance of circadian clock genes in regulating bone mass. In addition, this review explores the evidence for a link between shift work (and its associated disturbances in sleep duration/quality and circadian alignment) and alterations in bone metabolism and bone health. Finally, we review how commonly used medications and over-the-counter substances (e.g. caffeine, melatonin) complicate the relationship between sleep and circadian disorders and bone health.
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Affiliation(s)
- Christine M Swanson
- Division of Endocrinology, Metabolism, and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
| | - Wendy M Kohrt
- Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Eastern Colorado VA Geriatric, Research, Education, and Clinical Center, Aurora, CO, USA
| | - Orfeu M Buxton
- Department of Biobehavioral Health, Pennsylvania State University, University Park, PA, USA; Division of Sleep Medicine, Harvard Medical School, Boston, MA, USA; Sleep Health Institute, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, MA, USA; Department of Social and Behavioral Sciences, Harvard Chan School of Public Health, Boston, MA, USA
| | - Carol A Everson
- Department of Medicine, Division of Endocrinology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Kenneth P Wright
- Division of Endocrinology, Metabolism, and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, USA
| | - Eric S Orwoll
- Division of Endocrinology and Bone and Mineral Unit, Oregon Health & Science University, Portland, OR, USA
| | - Steven A Shea
- Oregon Institute of Occupational Health Sciences, Oregon Health & Science University, Portland, OR, USA; OHSU-PSU School of Public Health, Portland, OR, USA
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21
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Hensen HA, Krishnan AV, Eckert DJ. Sleep-Disordered Breathing in People with Multiple Sclerosis: Prevalence, Pathophysiological Mechanisms, and Disease Consequences. Front Neurol 2018; 8:740. [PMID: 29379466 PMCID: PMC5775511 DOI: 10.3389/fneur.2017.00740] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 12/22/2017] [Indexed: 12/26/2022] Open
Abstract
Sleep problems are common in people with multiple sclerosis (MS). Reported prevalence rates of sleep-disordered breathing (SDB) vary between 0 and 87%. Differences in recruitment procedures and study designs likely contribute to the wide variance in reported prevalence rates of SBD in MS. This can make attempts to compare SDB rates in people with MS to the general population challenging. Little is known about the pathophysiological mechanisms that contribute to SDB in people with MS or whether MS contributes to SDB disease progression. However, compared to the general obstructive sleep apnea (OSA) population, there are clear differences in the clinical phenotypes of SDB in the MS population. For instance they are typically not obese and rates of SDB are often comparable or higher to the general population, despite the high female predominance of MS. Thus, the risk factors and pathophysiological causes of SDB in people with MS are likely to be different compared to people with OSA who do not have MS. There may be important bidirectional relationships between SDB and MS. Demyelinating lesions of MS in the brain stem and spinal cord could influence breathing control and upper airway muscle activity to cause SDB. Intermittent hypoxia caused by apneas during the night can increase oxidative stress and may worsen neurodegeneration in people with MS. In addition, inflammation and changes in cytokine levels may play a key role in the relationship between SDB and MS and their shared consequences. Indeed, fatigue, neurocognitive dysfunction, and depression may worsen considerably if both disorders coexist. Recent studies indicate that treatment of SDB in people with MS with conventional first-line therapy, continuous positive airway pressure therapy, can reduce fatigue and cognitive impairment. However, if the causes of SDB differ in people with MS, so too may the optimal therapy. Thus, many questions remain concerning the relationship between these two disorders and the underlying mechanisms and shared consequences. Improved understanding of these factors has the potential to unlock new therapeutic targets.
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Affiliation(s)
- Hanna A Hensen
- Neuroscience Research Australia (NeuRA), Sydney, NSW, Australia.,School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Arun V Krishnan
- Prince of Wales Clinical School, University of New South Wales, Sydney, NSW, Australia
| | - Danny J Eckert
- Neuroscience Research Australia (NeuRA), Sydney, NSW, Australia.,School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
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22
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Tyagi S, Perera S, Brach JS. Balance and Mobility in Community-Dwelling Older Adults: Effect of Daytime Sleepiness. J Am Geriatr Soc 2016; 65:1019-1025. [PMID: 27991662 DOI: 10.1111/jgs.14735] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To examine the effect of self-reported daytime sleepiness on performance-based balance measures and self-reported balance confidence in community-dwelling older adults. DESIGN Cross-sectional secondary analysis of an observational cohort study designed to develop and refine measures of balance and mobility in community-dwelling older adults. SETTING Community. PARTICIPANTS Older adults (aged 78.2 ± 5.9) (n = 120). MEASUREMENTS The performance-based gait and balance measures included gait speed, double support time, and step width. Narrow walk, obstacle walk, and timed standing balance were also assessed. The Activities-Specific Balance Confidence Scale was included as a self-reported measure. Daytime sleepiness was defined as an Epworth Sleepiness Scale score of 9 or greater. Body mass index, fall-related comorbidities, and use of central nervous system (CNS) medications were considered as covariates. RESULTS Forty-five percent of participants reported daytime sleepiness. Participants reporting daytime sleepiness differed significantly from those without in gait speed (adjusted difference (standard error (SE)) -0.09 (0.04) m/s, P = .03), step width (adjusted difference (SE) 0.02 (0.01), P = .03), and self-reported balance confidence (adjusted difference (SE) -1.02 (0.38), P = .01) even after adjusting for covariates. Two-way analysis of variance of CNS medication use and daytime sleepiness showed no significant interaction effects. CONCLUSION Self-reported daytime sleepiness is associated with slower gait speed and poor balance confidence in community-dwelling older adults. Subjective sleep assessment should be considered when assessing balance and implementing interventions for improving balance in older adults. Further study is needed to examine the role of CNS medication use.
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Affiliation(s)
- Shachi Tyagi
- Division of Geriatrics and Gerontology, Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Subashan Perera
- Division of Geriatrics and Gerontology, Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jennifer S Brach
- Department of Physical Therapy, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
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23
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Furtado F, Gonçalves BDSB, Abranches ILL, Abrantes AF, Forner-Cordero A. Chronic Low Quality Sleep Impairs Postural Control in Healthy Adults. PLoS One 2016; 11:e0163310. [PMID: 27732604 PMCID: PMC5061348 DOI: 10.1371/journal.pone.0163310] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 09/07/2016] [Indexed: 02/04/2023] Open
Abstract
The lack of sleep, both in quality and quantity, is an increasing problem in modern society, often related to workload and stress. A number of studies have addressed the effects of acute (total) sleep deprivation on postural control. However, up to date, the effects of chronic sleep deficits, either in quantity or quality, have not been analyzed. Thirty healthy adults participated in the study that consisted of registering activity with a wrist actigraph for more than a week before performing a series of postural control tests. Sleep and circadian rhythm variables were correlated and the sum of activity of the least active 5-h period, L5, a rhythm variable, obtained the greater coefficient value with sleep quality variables (wake after sleep onset WASO and efficiency sleep). Cluster analysis was performed to classify subjects into two groups based on L5 (low and high). The balance tests scores used to asses postural control were measured using Biodex Balance System and were compared between the two groups with different sleep quality. The postural tests were divided into dynamic (platform tilt with eyes open, closed and cursor) and static (clinical test of sensory integration). The results showed that during the tests with eyes closed, the group with worse sleep quality had also worse postural control performance. Lack of vision impairs postural balance more deeply in subjects with chronic sleep inefficiency. Chronic poor sleep quality impairs postural control similarly to total sleep deprivation.
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Affiliation(s)
- Fabianne Furtado
- Department of Mechatronics, Escola Politécnica, University of Sao Paulo, São Paulo, Brazil
- Federal Institute of Education, Science, and Technology of Southeast of Minas Gerais, Barbacena, Minas Gerais, Brazil
| | | | | | - Ana Flávia Abrantes
- Federal Institute of Education, Science, and Technology of Southeast of Minas Gerais, Barbacena, Minas Gerais, Brazil
| | - Arturo Forner-Cordero
- Department of Mechatronics, Escola Politécnica, University of Sao Paulo, São Paulo, Brazil
- * E-mail: ;
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Narciso FV, Barela JA, Aguiar SA, Carvalho ANS, Tufik S, de Mello MT. Effects of Shift Work on the Postural and Psychomotor Performance of Night Workers. PLoS One 2016; 11:e0151609. [PMID: 27115868 PMCID: PMC4845980 DOI: 10.1371/journal.pone.0151609] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 03/01/2016] [Indexed: 11/18/2022] Open
Abstract
The purpose of the study was to investigate the effects of shift work on the psychomotor and postural performance of night workers. The study included 20 polysomnography technicians working schedule of 12-h night shift by 36-h off. On the first day of protocol, the body mass and height were measured, and an actigraph was placed on the wrist of each participant. On the second day of protocol, sleepiness by Karolinska Sleepiness Scale, postural control by force platform (30 seconds) and psychomotor performance by Psychomotor Vigilance Task (10 minutes) were measured before and after 12-h night work. Results showed that after 12-h night work, sleepiness increased by 59% (p<0.001), postural control variables increased by 9% (p = 0.048), and 14% (p = 0.006). Mean reaction time, and the number of lapses of attention increased by 13% (p = 0.006) and 425% (p = 0.015), respectively, but the mean reciprocal reaction time decreased by 7%. In addition, there were correlations between sleepiness and postural control variables with opened eyes (r = 0.616, 95% confidence interval [CI] = 0.361-0.815; r = 0.538; 95% CI = 0.280-0.748) and closed eyes (r = 0.557; 95% CI = 0.304-0.764, r = 0497; 95% CI = 0.325-0.715) and a pronounced effect of sleepiness on postural sway (R2 = 0.393; 95% CI = 0.001-0.03). Therefore, 12-h night work system and sleepiness showed a negative impact in postural and psychomotor vigilance performance of night workers. As unexpected, the force platform was feasibility to detect sleepiness in this population, underscoring the possibility of using this method in the workplace to prevent occupational injuries and accidents.
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Affiliation(s)
| | | | | | | | - Sergio Tufik
- Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Marco Túlio de Mello
- Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- * E-mail:
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Alonso JF, Romero S, Mañanas MA, Alcalá M, Antonijoan RM, Giménez S. Acute Sleep Deprivation Induces a Local Brain Transfer Information Increase in the Frontal Cortex in a Widespread Decrease Context. SENSORS (BASEL, SWITZERLAND) 2016; 16:E540. [PMID: 27089346 PMCID: PMC4851054 DOI: 10.3390/s16040540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 04/05/2016] [Accepted: 04/12/2016] [Indexed: 01/24/2023]
Abstract
Sleep deprivation (SD) has adverse effects on mental and physical health, affecting the cognitive abilities and emotional states. Specifically, cognitive functions and alertness are known to decrease after SD. The aim of this work was to identify the directional information transfer after SD on scalp EEG signals using transfer entropy (TE). Using a robust methodology based on EEG recordings of 18 volunteers deprived from sleep for 36 h, TE and spectral analysis were performed to characterize EEG data acquired every 2 h. Correlation between connectivity measures and subjective somnolence was assessed. In general, TE showed medium- and long-range significant decreases originated at the occipital areas and directed towards different regions, which could be interpreted as the transfer of predictive information from parieto-occipital activity to the rest of the head. Simultaneously, short-range increases were obtained for the frontal areas, following a consistent and robust time course with significant maps after 20 h of sleep deprivation. Changes during sleep deprivation in brain network were measured effectively by TE, which showed increased local connectivity and diminished global integration. TE is an objective measure that could be used as a potential measure of sleep pressure and somnolence with the additional property of directed relationships.
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Affiliation(s)
- Joan F Alonso
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- Barcelona College of Industrial Engineering, Universitat Politècnica de Catalunya, Barcelona 08037, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza 50018, Spain.
| | - Sergio Romero
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza 50018, Spain.
| | - Miguel A Mañanas
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- Barcelona College of Industrial Engineering, Universitat Politècnica de Catalunya, Barcelona 08037, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza 50018, Spain.
| | - Marta Alcalá
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- Barcelona College of Industrial Engineering, Universitat Politècnica de Catalunya, Barcelona 08037, Spain.
| | - Rosa M Antonijoan
- Drug Research Centre, Hospital de la Santa Creu i Sant Pau, Barcelona 08026, Spain.
- Department of Pharmacology and Therapeutics, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain.
- CIBER de Salud Mental (CIBERSAM), Madrid 28029, Spain.
| | - Sandra Giménez
- Drug Research Centre, Hospital de la Santa Creu i Sant Pau, Barcelona 08026, Spain.
- Department of Pharmacology and Therapeutics, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain.
- CIBER de Salud Mental (CIBERSAM), Madrid 28029, Spain.
- Sleep Unit, Respiratory Department, Hospital de la Santa Creu i Sant Pau, Barcelona 08028, Spain.
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Aguiar SA, Barela JA. Adaptation of sensorimotor coupling in postural control is impaired by sleep deprivation. PLoS One 2015; 10:e0122340. [PMID: 25799560 PMCID: PMC4370556 DOI: 10.1371/journal.pone.0122340] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/13/2015] [Indexed: 12/03/2022] Open
Abstract
The purpose of the study was to investigate the effects of sleep deprivation (SD) in adaptation of the coupling between visual information and body sway in young adults’ postural control due to changes in optic flow characteristics. Fifteen young adults were kept awake for approximately 25 hours and formed the SD group, while fifteen adults who slept normally the night before the experiment participated as part of the control group. All participants stood as still as possible in a moving room before and after being exposed to one trial with higher amplitude and velocity of room movement. Postural performance and the coupling between visual information, provided by a moving room, and body sway were examined. Results showed that after an abrupt change in visual cues, larger amplitude, and higher velocity of the room, the influence of room motion on body sway was decreased in both groups. However, such a decrease was less pronounced in sleep deprived as compared to control subjects. Sleep deprived adults were able to adapt motor responses to the environmental change provided by the increase in room motion amplitude. Nevertheless, they were not as efficient as control subjects in doing so, which demonstrates that SD impairs the ability to adapt sensorimotor coupling while controlling posture when a perturbation occurs.
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Affiliation(s)
- Stefane A. Aguiar
- Institute of Physical Activity and Sport Sciences, Cruzeiro do Sul University, São Paulo, Brazil
| | - José A. Barela
- Institute of Physical Activity and Sport Sciences, Cruzeiro do Sul University, São Paulo, Brazil
- Institute of Biosciences, São Paulo State University, Rio Claro, Brazil
- * E-mail:
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Aguiar SA, Barela JA. Sleep deprivation affects sensorimotor coupling in postural control of young adults. Neurosci Lett 2014; 574:47-52. [PMID: 24858135 DOI: 10.1016/j.neulet.2014.05.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 11/26/2022]
Abstract
Although impairments in postural control have been reported due to sleep deprivation, the mechanisms underlying such performance decrements still need to be uncovered. The purpose of this study was to investigate the effects of sleep deprivation on the relationship between visual information and body sway in young adults' postural control. Thirty adults who remained awake during one night and 30 adults who slept normally the night before the experiment participated in this study. The moving room paradigm was utilized, manipulating visual information through the movement of a room while the floor remained motionless. Subjects stood upright inside of a moving room during four 60-s trials. In the first trial the room was kept stationary and in the following trials the room moved with a frequency of 0.2Hz, peak velocity of 0.6cm/s and 0.9cm peak-to-peak amplitude. Body sway and room displacement were measured through infrared markers. Results showed larger and faster body sway in sleep deprived subjects with and without visual manipulation. The magnitude with which visual stimulus influenced body sway and its temporal relationship were unaltered in sleep deprived individuals, but they became less coherent and more variable as they had to maintain upright stance during trials. These results indicate that after sleep deprivation adults become less stable and accurate in relating visual information to motor action, and this effect is observed after only a brief period performing postural tasks. The low cognitive load employed in this task suggests that attentional difficulties are not the only factor leading to sensorimotor coupling impairments observed following sleep deprivation.
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Affiliation(s)
- Stefane A Aguiar
- Institute of Physical Activity and Sport Sciences, Cruzeiro do Sul University, São Paulo, SP, Brazil
| | - José A Barela
- Institute of Physical Activity and Sport Sciences, Cruzeiro do Sul University, São Paulo, SP, Brazil; Institute of Biosciences, São Paulo State University, Rio Claro, SP, Brazil.
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Abstract
OBJECTIVE Proper concussion assessment is imperative for properly caring for athletes who sustain traumatic brain injuries. Decreased sleep quality and sleep quantity affect cognition and may threaten the validity of clinical measures often used as a part of the concussion assessment. The purpose of this study was to determine if sleep quality or sleep quantity affects performance on clinical measures of concussion. DESIGN Prospective cohort design. SETTING Clinical research center. PARTICIPANTS One hundred fifty-five college student-athletes (57 females, 98 males; age = 18.8 ± 0.8 years; mass = 78.4 ± 19.6 kg; height = 177.4 ± 12.3 cm). INTERVENTIONS We performed preseason baseline testing by using a well-accepted and multifaceted protocol inclusive of neurocognition, balance performance, and symptom reporting. Information related to sleep quality and sleep quantity was also collected during preseason baseline testing. MAIN OUTCOME MEASURES The CNS Vital Signs battery (computerized neurocognitive test), Sensory Organization Test (computerized dynamic posturography), and a Graded Symptom Checklist (symptom evaluation) were used. RESULTS Subjects with a low sleep quantity the night before baseline reported both a greater number of symptoms and higher total symptom severity score. No clinically significant effects for sleep quality were observed. CONCLUSIONS Sleep-deprived athletes reporting for baseline testing should be rescheduled for testing after a normal night's sleep.
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Circadian amplitude and homeostatic buildup rate in postural control. Gait Posture 2013; 38:192-7. [PMID: 23245641 DOI: 10.1016/j.gaitpost.2012.11.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 11/07/2012] [Accepted: 11/09/2012] [Indexed: 02/02/2023]
Abstract
Postural control during quiet stance is a common everyday physical activity. Sleepiness is increasingly prevalent in our 24-h society. Yet, little research exists that quantitatively links the fluctuations in sleepiness and postural control. This study quantifies the circadian amplitude and homeostatic buildup rate in postural control. With a force plate we assessed postural control in 12 participants (21-38 years) every 2h during 24h of sustained wakefulness. The sway area was 1.39 ± 0.71 mm(2) at the circadian high around noon, and 4.02 ± 0.67 mm(2) at the circadian low around 6 am (a 189% change, p=0.02). The circadian amplitude of the sway area was therefore 2.63 mm(2). The sway area was 1.92 ± 0.64 mm(2) at the start of the 24-h period and 4.42 ± 0.69 mm(2) at the end of the period (a 130% change, p<0.001). The homeostatic buildup rate of sway area was 0.04 h(-1). The circadian- and homeostatic effects on sway variability, sway velocity, sway frequency and fractal dimension were smaller but still significant. This study found that the circadian amplitude and homeostatic buildup rate are quantifiable from posturographic data, and that they have significant impact on postural control. This finding is important because it means that one could apply the framework of the famous two-process model of sleep regulation (published by Borbély in 1982) to explain the previously reported sleepiness-related changes in postural control.
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Elfering A, Grebner S, Boillat C. Busy at Work and Absent-Minded at Home. SWISS JOURNAL OF PSYCHOLOGY 2013. [DOI: 10.1024/1421-0185/a000114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This study investigates whether cognitive failures mediate the potential influence of work demands and conscientiousness on body balance problems and domestic near-falls at home after work. The participants were 109 employees (55% female). We used the Workplace Cognitive Failure Scale (WCFS) to measure the frequency of failure in memory function, failure in attention regulation, and failure in action execution. Performance constraints, time pressure, and concentration demands were assessed by the Instrument for Stress-Oriented Task Analysis (ISTA). In a structural equation model, work-related cognitive failure significantly mediated the influence of work demands on after-work domestic body balance problems encountered in the previous 4 weeks. Work-related cognitive failure did not mediate the directional link between conscientiousness and body balance problems. Mental work demands have aftereffects after work is finished. The risk of domestic fall is due in part to cognitive failure that reflects cognitive strain from mental workload. Work redesign is likely to reduce the risk of falling not only at work, but also after work at home.
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Affiliation(s)
- Achim Elfering
- Department of Psychology, University of Bern, Switzerland
| | - Simone Grebner
- Department of Psychology, University of Bern, Switzerland
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31
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The effect of extended wake on postural control in young adults. Exp Brain Res 2012; 221:329-35. [PMID: 22821076 DOI: 10.1007/s00221-012-3175-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 06/28/2012] [Indexed: 10/28/2022]
Abstract
The sleep-wake cycle is a major determinant of locomotor activity in humans, and the neural and physiological processes necessary for optimum postural control may be impaired by an extension of the wake period into habitual sleep time. There is growing evidence for such a contribution from sleep-related factors, but great inconsistency in the methods used to assess this contribution, particularly in control for circadian phase position. Postural control was assessed at hourly intervals across 14 h of extended wake in nine young adult participants. Force plate parameters of medio-lateral and anterior-posterior sway, centre of pressure (CoP) trace length, area, and velocity were assessed with eyes open and eyes closed over 3-min periods. A standard measure of psychomotor vigilance was assessed concurrently under constant routine conditions. After controlling for individual differences in circadian phase position, a significant effect of extended wake was found for anterior-posterior sway and for psychomotor vigilance. These data suggest that extended wake may increase the risk of a fall or other consequences of impaired postural control.
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Robillard R, Prince F, Filipini D, Carrier J. Aging worsens the effects of sleep deprivation on postural control. PLoS One 2011; 6:e28731. [PMID: 22163330 PMCID: PMC3233602 DOI: 10.1371/journal.pone.0028731] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 11/14/2011] [Indexed: 11/18/2022] Open
Abstract
Falls increase with age and cause significant injuries in the elderly. This study aimed to determine whether age modulates the interactions between sleep deprivation and postural control and to evaluate how attention influences these interactions in the elderly. Fifteen young (24±2.7 y.o.) and 15 older adults (64±3.2 y.o.) stood still on a force plate after a night of sleep and after total sleep deprivation. Center of pressure range and velocity were measured with eyes open and with eyes closed while participants performed an interference task, a control task, and no cognitive task. Sleep deprivation increased the antero-posterior range of center of pressure in both age groups and center of pressure speed in older participants only. In elderly participants, the destabilizing effects of sleep deprivation were more pronounced with eyes closed. The interference task did not alter postural control beyond the destabilization induced by sleep loss in older subjects. It was concluded that sleep loss has greater destabilizing effects on postural control in older than in younger participants, and may therefore increase the risk of falls in the elderly.
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Affiliation(s)
- Rébecca Robillard
- Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada
- Département de Psychologie, Université de Montréal, Montréal, Québec, Canada
| | - François Prince
- Département de Kinésiologie, Université de Montréal, Montréal, Québec, Canada
| | - Daniel Filipini
- Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada
| | - Julie Carrier
- Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada
- Institut Universitaire de Gériatrie de Montréal, Université de Montréal, Montréal, Québec, Canada
- Département de Psychologie, Université de Montréal, Montréal, Québec, Canada
- * E-mail:
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Prehn-Kristensen A, Molzow I, Munz M, Wilhelm I, Müller K, Freytag D, Wiesner CD, Baving L. Sleep restores daytime deficits in procedural memory in children with attention-deficit/hyperactivity disorder. RESEARCH IN DEVELOPMENTAL DISABILITIES 2011; 32:2480-2488. [PMID: 21820271 DOI: 10.1016/j.ridd.2011.06.021] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 06/24/2011] [Indexed: 05/31/2023]
Abstract
Sleep supports the consolidation of declarative and procedural memory. While prefrontal cortex (PFC) activity supports the consolidation of declarative memory during sleep, opposite effects of PFC activity are reported with respect to the consolidation of procedural memory during sleep. Patients with attention-deficit/hyperactivity disorder (ADHD) are characterised by a prefrontal hypoactivity. Therefore, we hypothesised that children with ADHD benefit from sleep with respect to procedural memory more than healthy children. Sixteen children with ADHD and 16 healthy controls (aged 9-12) participated in this study. A modification of the serial-reaction-time task was conducted. In the sleep condition, learning took place in the evening and retrieval after a night of sleep, whereas in the wake condition learning took place in the morning and retrieval in the evening without sleep. Children with ADHD showed an improvement in motor skills after sleep compared to the wake condition. Sleep-associated gain in reaction times was positively correlated with the amount of sleep stage 4 and REM-density in ADHD. As expected, sleep did not benefit motor performance in the group of healthy children. These data suggest that sleep in ADHD normalizes deficits in procedural memory observed during daytime. It is discussed whether in patients with ADHD attenuated prefrontal control enables sleep-dependent gains in motor skills by reducing the competitive interference between explicit and implicit components within a motor task.
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Affiliation(s)
- Alexander Prehn-Kristensen
- Center for Integrative Psychiatry, Department of Child and Adolescent Psychiatry and Psychotherapy, Christian-Albrechts-University School of Medicine, 24105 Kiel, Germany.
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