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VanDyk T, Meyer B, DePetrillo P, Donahue N, O'Leary A, Fox S, Cheney N, Ceruolo M, Solomon AJ, McGinnis RS. Digital Phenotypes of Instability and Fatigue Derived From Daily Standing Transitions in Persons With Multiple Sclerosis. IEEE Trans Neural Syst Rehabil Eng 2023; 31:2279-2286. [PMID: 37115839 PMCID: PMC10408384 DOI: 10.1109/tnsre.2023.3271601] [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] [Indexed: 04/29/2023]
Abstract
Impairment in persons with multiple sclerosis (PwMS) can often be attributed to symptoms of motor instability and fatigue. Symptom monitoring and queued interventions often target these symptoms. Clinical metrics are currently limited to objective physician assessments or subjective patient reported measures. Recent research has turned to wearables for improving the objectivity and temporal resolution of assessment. Our group has previously observed wearable assessment of supervised and unsupervised standing transitions to be predictive of fall-risk in PwMS. Here we extend the application of standing transition quantification to longitudinal home monitoring of symptoms. Subjects (N=23) with varying degrees of MS impairment were recruited and monitored with accelerometry for a total of ∼ 6 weeks each. These data were processed using a preexisting framework, applying a deep learning activity classifier to isolate periods of standing transition from which descriptive features were extracted for analysis. Participants completed daily and biweekly assessments describing their symptoms. From these data, Canonical Correlation Analysis was used to derive digital phenotypes of MS instability and fatigue. We find these phenotypes capable of distinguishing fallers from non-fallers, and further that they demonstrate a capacity to characterize symptoms at both daily and sub-daily resolutions. These results represent promising support for future applications of wearables, which may soon augment or replace current metrics in longitudinal monitoring of PwMS.
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Pivovarova-Ramich O, Zimmermann HG, Paul F. Multiple sclerosis and circadian rhythms: Can diet act as a treatment? Acta Physiol (Oxf) 2023; 237:e13939. [PMID: 36700353 DOI: 10.1111/apha.13939] [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: 09/17/2022] [Revised: 12/15/2022] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Multiple sclerosis (MS) is an autoimmune inflammatory and neurodegenerative disease of the central nervous system (CNS) with increasing incidence and prevalence. MS is associated with inflammatory and metabolic disturbances that, as preliminary human and animal data suggest, might be mediated by disruption of circadian rhythmicity. Nutrition habits can influence the risk for MS, and dietary interventions may be effective in modulating MS disease course. Chronotherapeutic approaches such as time-restricted eating (TRE) may benefit people with MS by stabilizing the circadian clock and restoring immunological and metabolic rhythms, thus potentially counteracting disease progression. This review provides a summary of selected studies on dietary intervention in MS, circadian rhythms, and their disruption in MS, including clock gene variations, circadian hormones, and retino-hypothalamic tract changes. Furthermore, we present studies that reported diurnal variations in MS, which might result from circadian disruption. And lastly, we suggest how chrononutritive approaches like TRE might counteract MS disease activity.
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Affiliation(s)
- Olga Pivovarova-Ramich
- Research Group Molecular Nutritional Medicine, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- Department of Endocrinology, Diabetes and Nutrition, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- German Center for Diabetes Research (DZD), Munich-Neuherberg, Germany
| | - Hanna Gwendolyn Zimmermann
- Experimental and Clinical Research Center, Max-Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Einstein Center Digital Future, Berlin, Germany
| | - Friedemann Paul
- Experimental and Clinical Research Center, Max-Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Department of Neurology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
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Kong L, Zhang X, Meng L, Xue H, Zhou W, Meng X, Zhang Q, Shen J. Effects of music therapy intervention on gait disorders in persons with multiple sclerosis: A systematic review of clinical trials. Mult Scler Relat Disord 2023; 73:104629. [PMID: 36963169 DOI: 10.1016/j.msard.2023.104629] [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: 10/24/2022] [Revised: 03/15/2023] [Accepted: 03/18/2023] [Indexed: 03/26/2023]
Abstract
BACKGROUND Music Therapy (MT) is a unique treatment method for Persons with Multiple Sclerosis (PwMS) that can accelerate their functional recovery. MT has been proven to adjust the gait performance of PwMS in a short period. Its therapeutic effects in gait disorders of PwMS for long-term intervention are also starting to draw interest, but it has yet to be investigated. AIM This review aimed to systematically examine the outcomes of PwMS with gait disorders after receiving MT intervention. METHODS A systematic review has been performed using several academic databases with keywords such as music therapy, multiple sclerosis, and gait. The study protocol was registered on PROSPERO (CRD42022365668). RESULTS A total of 405 studies were initially identified. After applying the inclusion and exclusion criteria, twelve studies were finally included. The results showed that all PwMS received MT intervention with different strategies, and ten studies confirmed that gait disorders of PwMS were effectively improved by MT intervention. CONCLUSION Most previous studies focused on the transient effects of MT on the gait performance of PwMS. This review bridges gaps in the long-term intervention of MT on gait disorders of PwMS and offers references for therapists to design treatment plans. According to this review, MT intervention has positive therapeutic effects on gait disorders in PwMS.
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Affiliation(s)
- Lingyu Kong
- Physical Education and Sports School, Soochow University, Suzhou, 215021, PR China
| | - Xinwen Zhang
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, 215021, PR. China
| | - Lingyue Meng
- Physical Education and Sports School, Soochow University, Suzhou, 215021, PR China
| | - Hao Xue
- Physical Education and Sports School, Soochow University, Suzhou, 215021, PR China
| | - Wenlong Zhou
- Physical Education and Sports School, Soochow University, Suzhou, 215021, PR China
| | - Xin Meng
- Physical Education and Sports School, Soochow University, Suzhou, 215021, PR China
| | - Qiuxia Zhang
- Physical Education and Sports School, Soochow University, Suzhou, 215021, PR China.
| | - Jianzhong Shen
- Rehabilitation Diagnosis and Treatment Center, Shanghai Yongci Rehabilitation Hospital, Shanghai, 201107, PR. China.
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Hansen C, Chebil B, Cockroft J, Bianchini E, Romijnders R, Maetzler W. Changes in Coordination and Its Variability with an Increase in Functional Performance of the Lower Extremities. BIOSENSORS 2023; 13:156. [PMID: 36831922 PMCID: PMC9953305 DOI: 10.3390/bios13020156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Clinical gait analysis has a long-standing tradition in biomechanics. However, the use of kinematic data or segment coordination has not been reported based on wearable sensors in "real-life" environments. In this work, the skeletal kinematics of 21 healthy and 24 neurogeriatric participants was collected in a magnetically disturbed environment with inertial measurement units (IMUs) using an accelerometer-based functional calibration method. The system consists of seven IMUs attached to the lower back, the thighs, the shanks, and the feet to acquire and process the raw sensor data. The Short Physical Performance Battery (SPPB) test was performed to relate joint kinematics and segment coordination to the overall SPPB score. Participants were then divided into three subgroups based on low (0-6), moderate (7-9), or high (10-12) SPPB scores. The main finding of this study is that most IMU-based parameters significantly correlated with the SPPB score and the parameters significantly differed between the SPPB subgroups. Lower limb range of motion and joint segment coordination correlated positively with the SPPB score, and the segment coordination variability correlated negatively. The results suggest that segment coordination impairments become more pronounced with a decreasing SPPB score, indicating that participants with low overall SPPB scores produce a peculiar inconsistent walking pattern to counteract lower extremity impairment in strength, balance, and mobility. Our findings confirm the usefulness of SPPB through objectively measured parameters, which may be relevant for the design of future studies and clinical routines.
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Affiliation(s)
- Clint Hansen
- Neurogeriatrics, University Hospital Kiel, 24105 Kiel, Germany
| | - Baraah Chebil
- Neurogeriatrics, University Hospital Kiel, 24105 Kiel, Germany
| | - John Cockroft
- Neuromechanics Unit, Stellenbosch University, Stellenbosch 7602, South Africa
| | | | - Robbin Romijnders
- Neurogeriatrics, University Hospital Kiel, 24105 Kiel, Germany
- Digital Signal Processing and System Theory, Kiel University, 24118 Kiel, Germany
| | - Walter Maetzler
- Neurogeriatrics, University Hospital Kiel, 24105 Kiel, Germany
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Castelli L, Giovannini S, Iacovelli C, Fusco A, Pastorino R, Marafon DP, Pozzilli C, Padua L. Training-dependent plasticity and far transfer effect enhanced by Bobath rehabilitation in Multiple Sclerosis. Mult Scler Relat Disord 2022; 68:104241. [PMID: 36274281 DOI: 10.1016/j.msard.2022.104241] [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: 08/18/2022] [Revised: 09/21/2022] [Accepted: 10/09/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Multiple Sclerosis (MS) is a disease that often results in motor and/or cognitive disability. Despite the increasing availability of effective drug therapies, rehabilitation is very important means of counteracting the progression of disability and improving physical function, impacting social participation and improving quality of life. Several rehabilitation approaches can be used in the context of neuro-motor rehabilitation, but there is insufficient evidence for them in the literature. OBJECTIVES This study has the twofold purpose of: (i) investigate whether rehabilitation according to Bobath Concept can improve balance and some aspects of cognitive function in MS patients; (ii) explore whether the ability to improve postural control, an indirect index of adaptive neuroplasticity, is preserved in MS patients and whether it can be improved with rehabilitation. METHOD This is an independent wait-listed study. Forty people with MS (pwMS) were enrolled: patients in the Bobath group underwent 8 weeks of rehabilitation according to the Bobath Concept. For aim 1, pwMS were assessed at baseline (T0), at the end of the 8 weeks of treatment (T1) and after 8 weeks of observation (T2) with motor and cognitive scales. For aim 2, the same 40 pwMS were matched with healthy controls and were subjected to a postural learning task using the force platform at T0, T1 and T2. RESULTS Patients in Bobath group scored better on balance and cognitive function at T1, but this improvement was not maintained at T2. All patients were less accurate than controls in the postural learning task at each assessment; however, patients also demonstrated an increase in accuracy after training, similar to that of healthy controls. The learning curve was better for patients randomized to the active group than the waitlist at T1 time, but this advantage was not maintained at the T2 assessment. CONCLUSION In light of the results, this study supports the use of rehabilitation according to Bobath Concept to improve balance control and some executive functions in MS. Despite worse baseline performance, pwMS were able to learn a postural control task on par with healthy controls. Also, supports the hypothesis that adaptive plasticity is preserved despite MS and can be promoted by rehabilitation.
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Affiliation(s)
- Letizia Castelli
- Department of Aging, Neurological, Orthopaedic and Head-Neck Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Silvia Giovannini
- Department of Geriatrics and Orthopaedics, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; UOS Riabilitazione Post-acuzie, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy.
| | - Chiara Iacovelli
- Department of Aging, Neurological, Orthopaedic and Head-Neck Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Augusto Fusco
- UOC Neuroriabilitazione ad Alta Intensità, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Roberta Pastorino
- Department of Woman and Child Health and Public Health-Public Health Area, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; Section of Hygiene, University Department of Life Sciences and Public Health, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Denise Pires Marafon
- Section of Hygiene, University Department of Life Sciences and Public Health, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Carlo Pozzilli
- Department of Human Neurosciences, Sapienza University, Roma, Italy
| | - Luca Padua
- Department of Geriatrics and Orthopaedics, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; UOC Neuroriabilitazione ad Alta Intensità, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
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Ma J, Williams J, Morris PG, Chan PSWY. Effectiveness of mindful walking intervention in nature on sleep quality and mood among university student during Covid-19: A randomised control study. Explore (NY) 2022; 19:405-416. [PMID: 35973933 PMCID: PMC9365743 DOI: 10.1016/j.explore.2022.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/07/2022] [Accepted: 08/07/2022] [Indexed: 11/04/2022]
Abstract
OBJECTIVE The aim of this project was to conduct a randomised control study to examine whether outdoor mindful walking in nature can effectively improve university students' sleep quality, mood, and mindfulness during the lockdown of Covid-19 pandemic in the U.K. METHODS Participants were measured at T0 (pre-study baseline), T1 (pre-intervention), T2 (post-intervention), and T3 (follow-up). A total of 104 participants (female = 94) who were experiencing sleep difficulties were randomly allocated to either an experimental (i.e., nature) or control (i.e., urban) walking environments. Participants in each walking condition independently undertook a daily 35-minute walk for a week (7 days). Subjective sleep quality, total mood disturbance, mindfulness, and degree of nature, and participants' perspectives and suggestions about the intervention, were collected. RESULTS Findings suggest that both groups exhibited significant improvements on participant's trait mindfulness, sleep quality and mood after the intervention. However, mindful walking in nature did not bring additional mental health benefits to participants than those who walked in urban environment. Participants reflected their perspectives about the intervention, which will assist with further intervention development. CONCLUSIONS Findings contribute to the evidence base for the effectiveness of outdoor mindful walking interventions on mental health. Especially these findings add new knowledge of how mindful walking outdoors reduces university students' mood disturbances and improves their sleep quality and mindfulness level during the pandemic.
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Affiliation(s)
- Jingni Ma
- School of Health in Social Science, University of Edinburgh, Edinburgh, EH8 9AG, UK.
| | - Joanne Williams
- Room 2.4, Doorway 6, Medical Quad, Teviot Place, Edinburgh, EH8 9AG, UK
| | | | - Professor Stella W Y Chan
- Charlie Waller Chair in Evidence-based Psychological Treatment, School of Psychology & Clinical Language Sciences, University of Reading, Earley Gate, Whiteknights, Reading RG6 6ES, UK
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A machine learning-based model to evaluate multiple sclerosis predictor factors with emphasis on neurophysiological indices of physical activity. MEDICINE IN DRUG DISCOVERY 2022. [DOI: 10.1016/j.medidd.2022.100132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Gulde P, Rieckmann P. The Association Between Actigraphy-Derived Behavioral Clusters and Self-Reported Fatigue in Persons With Multiple Sclerosis: Cross-sectional Study. JMIR Rehabil Assist Technol 2022; 9:e31164. [PMID: 35297774 PMCID: PMC8972102 DOI: 10.2196/31164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 10/06/2021] [Accepted: 12/22/2021] [Indexed: 11/13/2022] Open
Abstract
Background Persons with multiple sclerosis frequently report increased levels of fatigue and fatigability. However, behavioral surrogates that are strongly associated with self-reports are lacking, which limits research and treatment. Objective The aim of this study was to derive distinct behavioral syndromes that are reflected by self-reports concerning fatigue and fatigability. Methods We collected actigraphic data of 30 persons with multiple sclerosis over a period of 1 week during an inpatient stay at a neurorehabilitation facility. Further, participants completed the German fatigue severity scale. A principal component analysis of actigraphic parameters was performed to extract the latent component levels of behaviors that reflect fatigue (quantity of activity) and fatigability (fragmentation of activity). The resulting components were used in a cluster analysis. Results Analyses suggested 3 clusters, one with high activity (d=0.65-1.57) and low clinical disability levels (d=0.91-1.39), one with high levels of sedentary behavior (d=1.06-1.58), and one with strong activity fragmentation (d=1.39-1.94). The cluster with high levels of sedentary behavior further revealed strong differences from the other clusters concerning participants’ reported levels of fatigue (d=0.99-1.28). Conclusions Cluster analysis data proved to be feasible to meaningfully differentiate between different behavioral syndromes. Self-reports reflected the different behavioral syndromes strongly. Testing of additional domains (eg, volition or processing speed) and assessments during everyday life seem warranted to better understand the origins of reported fatigue symptomatology.
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Affiliation(s)
- Philipp Gulde
- Center for Clinical Neuroplasticity, Medical Park Loipl, Medical Park Societas Europaea, Bischofswiesen, Germany.,Human Movement Science, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Peter Rieckmann
- Center for Clinical Neuroplasticity, Medical Park Loipl, Medical Park Societas Europaea, Bischofswiesen, Germany
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Fonseka RD, Natarajan P, Mobbs RJ. Inter-bout and intra-bout gait variability-proposed objective measures of gait deterioration during prolonged walking in spine care. JOURNAL OF SPINE SURGERY (HONG KONG) 2022; 8:180-184. [PMID: 35441111 PMCID: PMC8990389 DOI: 10.21037/jss-21-88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 09/29/2021] [Indexed: 06/14/2023]
Affiliation(s)
- R. Dineth Fonseka
- Faculty of Medicine, University of New South Wales, Sydney, Australia
- NeuroSpine Surgery Research Group (NSURG), Sydney, Australia
- Wearables and Gait Analysis Research Group (WAGAR), Sydney, Australia
| | - Pragadesh Natarajan
- Faculty of Medicine, University of New South Wales, Sydney, Australia
- NeuroSpine Surgery Research Group (NSURG), Sydney, Australia
- Wearables and Gait Analysis Research Group (WAGAR), Sydney, Australia
| | - Ralph J. Mobbs
- Faculty of Medicine, University of New South Wales, Sydney, Australia
- NeuroSpine Surgery Research Group (NSURG), Sydney, Australia
- Wearables and Gait Analysis Research Group (WAGAR), Sydney, Australia
- Department of Neurosurgery, Prince of Wales Hospital, Sydney, Australia
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Does Time of Day influence postural control and gait? A review of the literature. Gait Posture 2022; 92:153-166. [PMID: 34836768 DOI: 10.1016/j.gaitpost.2021.10.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 09/13/2021] [Accepted: 10/17/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Like many physiologic processes, Time of Day may influence postural control and gait. A better understanding of diurnal variations in postural control and gait may help to improve diagnoses, reduce falls, and optimize rehabilitation and training routines. This review summarizes the current literature that addresses these questions. RESEARCH QUESTION Does time of day affect postural control and gait? METHODS We searched PubMed, Google Scholar, and IEEE using a combination of keyword and MeSH terms. We included papers that studied human subjects and assessed gait or postural control as a function of time of day. We evaluated the quality of the identified papers based on nine assessment criteria and analyzed them considering the topic (postural control or gait), age, and characteristics of the conducted assessments. We then quantitatively synthesized the results across studies using a meta-analytical approach (i.e., Hedges' g model). RESULTS Twenty-two papers considered the relationship between time of day and postural control, and eleven considered the relationship between time of day and gait. Six studies found that postural control was best in the morning, four described postural control being best in the afternoon, four described optimal postural control in the evening, and eight reported no time of day effect. Two studies found gait best in the morning, five described gait best in the afternoon, two described optimal gait in the evening, and two reported no time of day effect. The results of the quantitative analysis suggest that both postural control and gait were best in the evening. SIGNIFICANCE While there is no clear consensus on whether there is a time of day effect for postural control and gait, the findings of this review provide initial evidence suggesting that a small but statistically significant effect exists in favor of the evening. Standardized testing, including repeated and continuous evaluations, may help provide more definitive information on time of day influences on postural control and gait.
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Aristotelous P, Stefanakis M, Pantzaris M, Pattichis CS, Calder PC, Patrikios IS, Sakkas GK, Giannaki CD. The Effects of Specific Omega-3 and Omega-6 Polyunsaturated Fatty Acids and Antioxidant Vitamins on Gait and Functional Capacity Parameters in Patients with Relapsing-Remitting Multiple Sclerosis. Nutrients 2021; 13:3661. [PMID: 34684661 PMCID: PMC8540949 DOI: 10.3390/nu13103661] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/13/2021] [Accepted: 10/16/2021] [Indexed: 11/16/2022] Open
Abstract
Patients with multiple sclerosis (MS) are characterized by, among other symptoms, impaired functional capacity and walking difficulties. Polyunsaturated fatty acids (PUFAs) have been found to improve MS patients' clinical outcomes; however, their effect on other parameters associated with daily living activities need further investigation. The current study aimed to examine the effect of a 24-month supplementation with a cocktail dietary supplement formula, the NeuroaspisTM PLP10, containing specific omega-3 and omega-6 PUFAs and specific antioxidant vitamins on gait and functional capacity parameters of patients with MS. Fifty-one relapsing-remitting MS (RRMS) patients with low disability scores (age: 38.4 ± 7.1 years; 30 female) were randomized 1:1 to receive either a 20 mL daily dose of the dietary formula containing a mixture of omega-3 and omega-6 PUFAs (12,150 mg), vitamin A (0.6 mg), vitamin E (22 mg), and γ-tocopherol (760 mg), the OMEGA group (n = 27; age: 39 ± 8.3 years), or 20 mL placebo containing virgin olive oil, the placebo group (n = 24; age: 37.8 ± 5.3 years). The mean ± SD (standard deviation) Expanded Disability Status Scale (EDSS) score for the placebo group was 2.36 and for the OMEGA group 2.22. All enrolled patients in the study were on Interferon-β treatment. Spatiotemporal gait parameters and gait deviation index (GDI) were assessed using a motion capture system. Functional capacity was examined using various functional tests such as the six-minute walk test (6MWT), two sit-to-stand tests (STS-5 and STS-60), and the Timed Up and Go test (TUG). Isometric handgrip strength was assessed by a dynamometer. Leg strength was assessed using an isokinetic dynamometer. All assessments were performed at baseline and at 12 and 24 months of supplementation. A total of 36 patients completed the study (18 from each group). Six patients from the placebo group and 9 patients from the OMEGA group dropped out from the study or were lost to follow-up. The dietary supplement significantly improved the single support time and the step and stride time (p < 0.05), both spatiotemporal gait parameters. In addition, while GDI of the placebo group decreased by about 10% at 24 months, it increased by about 4% in the OMEGA group (p < 0.05). Moreover, performance in the STS-60 test improved in the OMEGA group (p < 0.05) and there was a tendency for improvement in the 6MWT and TUG tests. Long-term supplementation with high dosages of omega-3 and omega-6 PUFAs (compared to previous published clinical studies using PUFAs) and specific antioxidant vitamins improved some functional capacity and gait parameters in RRMS patients.
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Affiliation(s)
- Panayiotis Aristotelous
- Department of Life and Health Sciences, University of Nicosia, Nicosia 2417, Cyprus; (P.A.); (M.S.)
| | - Manos Stefanakis
- Department of Life and Health Sciences, University of Nicosia, Nicosia 2417, Cyprus; (P.A.); (M.S.)
| | - Marios Pantzaris
- The Cyprus Institute of Neurology and Genetics, Nicosia 2371, Cyprus;
- Cyprus School of Molecular Medicine, Nicosia 2371, Cyprus
| | | | - Philip C. Calder
- Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK;
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton SO16 6YD, UK
- School of Medicine, European University Cyprus, Nicosia 2404, Cyprus;
| | | | - Giorgos K. Sakkas
- Department of PE and Sport Science, University of Thessaly, 42100 Trikala, Greece;
- School of Sports and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
| | - Christoforos D. Giannaki
- Department of Life and Health Sciences, University of Nicosia, Nicosia 2417, Cyprus; (P.A.); (M.S.)
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Redlicka J, Zielińska-Nowak E, Lipert A, Miller E. Impact of Moderate Individually Tailored Physical Activity in Multiple Sclerosis Patients with Fatigue on Functional, Cognitive, Emotional State, and Postural Stability. Brain Sci 2021; 11:brainsci11091214. [PMID: 34573235 PMCID: PMC8470948 DOI: 10.3390/brainsci11091214] [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: 08/12/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 12/22/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic disease, with fatigue syndrome as one of the main symptoms. The aim of this study was to demonstrate that moderate physical activity (MPA) may have a beneficial effect on postural stability, balance, and clinical parameters. The research group consisted of 137 randomized patients hospitalized at the Department of Neurological Rehabilitation, Medical University of Lodz. Finally, 76 patients were qualified who were divided into two groups—high fatigue (HF) and low fatigue (LF). Participants were assessed twice: before and after a 4-week MPA program using: the Expanded Disability Status Scale (EDSS), the Fatigue Severity Scale (FSS), the Mini-Mental State Examination (MMSE), the Montreal Cognitive Assessment (MoCA), the Beck Depression Inventory (BDI), and the Geriatric Depression Scale (GDS), and stabilometric platform tests were performed. Results obtained after the 4-week MPA program showed a positive effect of the MPA with differences between LF and HF groups. The MPA was more effective in MS patients with LF in cognitive functions, functional status, and postural stability but among HF patients in an emotional state, especially in MS patients below 65 years, although in total, both groups benefited from the MPA.
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Affiliation(s)
- Justyna Redlicka
- Department of Neurological Rehabilitation, Medical University of Lodz, Milionowa 14, 93-113 Lodz, Poland; (J.R.); (E.Z.-N.)
| | - Ewa Zielińska-Nowak
- Department of Neurological Rehabilitation, Medical University of Lodz, Milionowa 14, 93-113 Lodz, Poland; (J.R.); (E.Z.-N.)
| | - Anna Lipert
- Department of Sports Medicine, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland;
| | - Elżbieta Miller
- Department of Neurological Rehabilitation, Medical University of Lodz, Milionowa 14, 93-113 Lodz, Poland; (J.R.); (E.Z.-N.)
- Correspondence:
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Gulde P, Vojta H, Hermsdörfer J, Rieckmann P. State and trait of finger tapping performance in multiple sclerosis. Sci Rep 2021; 11:17095. [PMID: 34429445 PMCID: PMC8384844 DOI: 10.1038/s41598-021-96485-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 07/20/2021] [Indexed: 11/09/2022] Open
Abstract
Finger tapping tests have been shown feasible to assess motor performance in multiple sclerosis (MS) and were observed to be strongly associated with the estimated clinical severity of the disease. Therefore, tapping tests could be an adequate tool to assess disease status in MS. In this study we examined potential influencing factors on a maximum tapping task with the whole upper-limb for 10 s in 40 MS patients using linear mixed effects modelling. Patients were tested in three sessions with two trials per body-side per session over the course of 4–27 days of inpatient rehabilitation. Tested factors were the expanded disability scale (EDSS) score, laterality of MS, age, sex, hand dominance, time of day, session, trial (first or second), time between sessions, and the reported day form. A second model used these factors to examine the self-reported day form of patients. Linear mixed effects modelling indicated the tapping test to have a good inter-trial (proportional variance < 0.01) and inter-session reliability (non-significant; when controlling for time between sessions), an influence of hand-dominance (proportional variance 0.08), to be strongly associated with the EDSS (eta2 = 0.22, interaction with laterality of MS eta2 = 0.12) and to be not associated with the reported day form. The model explained 87% (p < 0.01) of variance in tapping performance. Lastly, we were able to observe a positive effect of neurologic inpatient rehabilitation on task performance obvious from a significant effect of the time between sessions (eta2 = 0.007; longer time spans between sessions were associated with higher increments in performance). Day form was only impacted by EDSS and the time of the day (p < 0.01, R2 = 0.57, eta2TIME = 0.017, eta2EDSS = 01.19). We conclude that the tapping test is a reliable and valid assessment tool for MS.
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Affiliation(s)
- Philipp Gulde
- Centre for Clinical Neuroplasticity, Medical Park Loipl (Medical Park Group), Thanngasse 15, 83483, Bischofswiesen, Germany. .,Technical University of Munich, Munich, Germany.
| | - Heike Vojta
- Centre for Clinical Neuroplasticity, Medical Park Loipl (Medical Park Group), Thanngasse 15, 83483, Bischofswiesen, Germany
| | | | - Peter Rieckmann
- Centre for Clinical Neuroplasticity, Medical Park Loipl (Medical Park Group), Thanngasse 15, 83483, Bischofswiesen, Germany.,Friedich-Alexander University Erlangen-Nurnberg, Erlangen, Germany
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14
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Objective electrophysiological fatigability markers and their modulation through tDCS. Clin Neurophysiol 2021; 132:1721-1732. [PMID: 33867262 DOI: 10.1016/j.clinph.2021.02.391] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 01/28/2021] [Accepted: 02/05/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVE Cognitive fatigability is a frequent symptom after sustained performance. Fatigability is evident in healthy subjects but is also often comorbid in several neuropsychiatric diseases. However, to date, clinical diagnostic almost solely relies on the self-reported subjective experience of fatigue. The goals of this present study were i) to complement the purely subjective fatigue diagnostic with objective electrophysiological fatigability parameters and ii) to prove the potential therapeutic application of transcranial direct current stimulation (tDCS) as a fatigability intervention. METHODS We performed a pseudo-randomized, sham-controlled, parallel-group trial. Forty healthy participants received either anodal or sham tDCS over the left dorsolateral prefrontal cortex (DLPFC) while they performed an exhaustive cognitive task to induce cognitive fatigability. To assess fatigability changes, we analyzed variations of prepulse inhibition (PPI) and P50 suppression as well as frontomedial theta and occipital alpha power with time-on-task. RESULTS The task reliably induced subjective exhaustion in all participants. Furthermore, we confirmed fatigability-related increases in frontomedial theta and occipital alpha power throughout the task. Additionally, fatigability significantly reduced PPI as well as P50 sensory gating. Anodal tDCS over the left DLPFC successfully counteracted fatigability and reduced the fatigability-related increase in alpha power as well as the decline in both gating parameters. CONCLUSION Occipital alpha and sensorimotor/sensory gating are suitable parameters to assess the severity of fatigability objectively. Anodal tDCS can counteract fatigability and has therapeutic potential for the treatment of fatigability in neuropsychiatric diseases. SIGNIFICANCE Fatigability can be objectively assessed by electrophysiological measures and attenuated by tDCS.
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15
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Assessment of Multiple Sclerosis Disability Progression Using a Wearable Biosensor: A Pilot Study. J Clin Med 2021; 10:jcm10061160. [PMID: 33802029 PMCID: PMC8001885 DOI: 10.3390/jcm10061160] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 02/04/2023] Open
Abstract
Background: The evaluation of walking activity of people with multiple sclerosis (pwMS) is desirable. We evaluate the power of the correlation of motor parameters detected by the accelerometer in the Samsung Gear S2 smartwatch with multiple sclerosis (MS) disability measures and patient reported outcomes (PROs). Methods: We enrolled 25 relapsing remitting MS patients. We assessed disability with the expanded disability status scale, two-minute walking test (2MWT), timed 25-foot walk test (T25FWT), and nine-hole peg test. We collected PROs measuring fatigue, ambulatory ability, depression, quality of life, and bladder/bowel function. Participants were asked to wear the accelerometer for a period of 30 days. Results: The Spearman’s rank correlation coefficient showed a moderate negative correlation between the patient-determined disease steps (PDDS) score with the mean steps/day, a strong negative correlation between the PDDS score with the maximum number of daily steps (MNDS) and a moderate negative correlation between the fatigue severity scale score and MNDS. A moderate negative correlation between MNDS and the 2MWT and a moderate negative correlation between MNDS and the T25FW was found. Conclusion: Our results suggest that motor parameters derived from the accelerometer could be a reliable measure of motor disability in pwMS.
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16
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Periodized versus classic exercise therapy in Multiple Sclerosis: a randomized controlled trial. Mult Scler Relat Disord 2021; 49:102782. [PMID: 33503527 DOI: 10.1016/j.msard.2021.102782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/06/2021] [Accepted: 01/17/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Periodizing exercise interventions in Multiple Sclerosis (MS) shows good high intensity exercise training adherence. Whether this approach induces comparable training adaptations with respect to exercise capacity, body composition and muscle strength compared to conventional, linear progressive training programs however is not known. METHODS Thirty-one persons with MS (all phenotypes, mean EDSS 2.3±1.3) were randomized into a twelve-week periodized (MSPER, n=17) or a classic endurance (MSCLA, n=14) training program. At baseline (PRE), exercise capacity (maximal exercise test, VO2max), body composition (DEXA) and muscle strength (Biodex®) were assessed. Classic, moderate intensity endurance training (60-80% HRmax, 5 training sessions/2w, 60min/session) was performed on a stationary bicycle. Periodized exercise included 4 recurrent 3-week cycles of alternated endurance training (week 1: endurance training as described above), high intense exercise (week 2: 3 sessions/w, 3 × 20s all-out sprints, 10min/session) and recovery weeks (week 3: one sprint session as described above). POST measurements were performed similar to baseline. Total exercise volume of both programs was expressed as total peak-effort training minutes. RESULTS For MSCLA, total exercise volume included 1728 total peak-effort training minutes, whereas MSPER included only 736. Despite this substantially reduced training volume, twelve weeks of periodized training significantly (p<0.05) improved VO2max (+14%, p=0.001), workload (+20%) and time until exhaustion (+25%). Classic training significantly (p<0.05) improved workload (+10%) and time until exhaustion (+17%), but not VO2max (+5%, p=0.131). Pre-post improvements for VO2max were significantly higher in MSPER compared to MSCLA (p=0.046). CONCLUSION These data show that despite substantially lower training time (57% less peak-effort training minutes), 12 weeks of periodized exercise training in persons with MS seems to induce larger improvements in parameters of exercise capacity compared to classic endurance training. We therefore recommend to further investigate the effect of training periodization on various functional rehabilitation measures in MS.
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17
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Hajifar S, Sun H, Megahed FM, Jones-Farmer LA, Rashedi E, Cavuoto LA. A forecasting framework for predicting perceived fatigue: Using time series methods to forecast ratings of perceived exertion with features from wearable sensors. APPLIED ERGONOMICS 2021; 90:103262. [PMID: 32927403 DOI: 10.1016/j.apergo.2020.103262] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 05/14/2023]
Abstract
Advancements in sensing and network technologies have increased the amount of data being collected to monitor the worker conditions. In this study, we consider the use of time series methods to forecast physical fatigue using subjective ratings of perceived exertion (RPE) and gait data from wearable sensors captured during a simulated in-lab manual material handling task (Lab Study 1) and a fatiguing squatting with intermittent walking cycle (Lab Study 2). To determine whether time series models can accurately forecast individual response and for how many time periods ahead, five models were compared: naïve method, autoregression (AR), autoregressive integrated moving average (ARIMA), vector autoregression (VAR), and the vector error correction model (VECM). For forecasts of three or more time periods ahead, the VECM model that incorporates historical RPE and wearable sensor data outperformed the other models with median mean absolute error (MAE) <1.24 and median MAE <1.22 across all participants for Lab Study 1 and Lab Study 2, respectively. These results suggest that wearable sensor data can support forecasting a worker's condition and the forecasts obtained are as good as current state-of-the-art models using multiple sensors for current time prediction.
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Affiliation(s)
- Sahand Hajifar
- Department of Industrial and Systems Engineering, University at Buffalo, Buffalo, NY 14260, USA.
| | - Hongyue Sun
- Department of Industrial and Systems Engineering, University at Buffalo, Buffalo, NY 14260, USA.
| | - Fadel M Megahed
- Farmer School of Business, Miami University, Oxford, OH 45056, USA.
| | | | - Ehsan Rashedi
- Department of Industrial and Systems Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA.
| | - Lora A Cavuoto
- Department of Industrial and Systems Engineering, University at Buffalo, Buffalo, NY 14260, USA.
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18
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Ibrahim AA, Küderle A, Gaßner H, Klucken J, Eskofier BM, Kluge F. Inertial sensor-based gait parameters reflect patient-reported fatigue in multiple sclerosis. J Neuroeng Rehabil 2020; 17:165. [PMID: 33339530 PMCID: PMC7749504 DOI: 10.1186/s12984-020-00798-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/09/2020] [Indexed: 12/30/2022] Open
Abstract
Background Multiple sclerosis (MS) is a disabling disease affecting the central nervous system and consequently the whole body’s functional systems resulting in different gait disorders. Fatigue is the most common symptom in MS with a prevalence of 80%. Previous research studied the relation between fatigue and gait impairment using stationary gait analysis systems and short gait tests (e.g. timed 25 ft walk). However, wearable inertial sensors providing gait data from longer and continuous gait bouts have not been used to assess the relation between fatigue and gait parameters in MS. Therefore, the aim of this study was to evaluate the association between fatigue and spatio-temporal gait parameters extracted from wearable foot-worn sensors and to predict the degree of fatigue. Methods Forty-nine patients with MS (32 women; 17 men; aged 41.6 years, EDSS 1.0–6.5) were included where each participant was equipped with a small Inertial Measurement Unit (IMU) on each foot. Spatio-temporal gait parameters were obtained from the 6-min walking test, and the Borg scale of perceived exertion was used to represent fatigue. Gait parameters were normalized by taking the difference of averaged gait parameters between the beginning and end of the test to eliminate inter-individual differences. Afterwards, normalized parameters were transformed to principle components that were used as input to a Random Forest regression model to formulate the relationship between gait parameters and fatigue. Results Six principal components were used as input to our model explaining more than 90% of variance within our dataset. Random Forest regression was used to predict fatigue. The model was validated using 10-fold cross validation and the mean absolute error was 1.38 points. Principal components consisting mainly of stride time, maximum toe clearance, heel strike angle, and stride length had large contributions (67%) to the predictions made by the Random Forest. Conclusions The level of fatigue can be predicted based on spatio-temporal gait parameters obtained from an IMU based system. The results can help therapists to monitor fatigue before and after treatment and in rehabilitation programs to evaluate their efficacy. Furthermore, this can be used in home monitoring scenarios where therapists can monitor fatigue using IMUs reducing time and effort of patients and therapists.
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Affiliation(s)
- Alzhraa A Ibrahim
- Machine Learning and Data Analytics Lab, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany. .,Computer Science Department, Faculty of Computers and Information, Assiut University, Asyut, Egypt.
| | - Arne Küderle
- Machine Learning and Data Analytics Lab, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Heiko Gaßner
- Department of Molecular Neurology, University Hospital Erlangen, Erlangen, Bavaria, Germany
| | - Jochen Klucken
- Department of Molecular Neurology, University Hospital Erlangen, Erlangen, Bavaria, Germany.,Fraunhofer Institut for Integrated Circuits, Erlangen, Bavaria, Germany.,Medical Valley Digital Health Application Center, Bamberg, Bavaria, Germany
| | - Bjoern M Eskofier
- Machine Learning and Data Analytics Lab, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Felix Kluge
- Machine Learning and Data Analytics Lab, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
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19
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Zhang G, Wong IKK, Chen TLW, Hong TTH, Wong DWC, Peng Y, Yan F, Wang Y, Tan Q, Zhang M. Identifying Fatigue Indicators Using Gait Variability Measures: A Longitudinal Study on Elderly Brisk Walking. SENSORS 2020; 20:s20236983. [PMID: 33297364 PMCID: PMC7730469 DOI: 10.3390/s20236983] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/01/2020] [Accepted: 12/04/2020] [Indexed: 12/23/2022]
Abstract
Real-time detection of fatigue in the elderly during physical exercises can help identify the stability and thus falling risks which are commonly achieved by the investigation of kinematic parameters. In this study, we aimed to identify the change in gait variability parameters from inertial measurement units (IMU) during a course of 60 min brisk walking which could lay the foundation for the development of fatigue-detecting wearable sensors. Eighteen elderly people were invited to participate in the brisk walking trials for 60 min with a single IMU attached to the posterior heel region of the dominant side. Nine sets of signals, including the accelerations, angular velocities, and rotation angles of the heel in three anatomical axes, were measured and extracted at the three walking times (baseline, 30th min, and 60th min) of the trial for analysis. Sixteen of eighteen participants reported fatigue after walking, and there were significant differences in the median acceleration (p = 0.001), variability of angular velocity (p = 0.025), and range of angle rotation (p = 0.0011), in the medial–lateral direction. In addition, there were also significant differences in the heel pronation angle (p = 0.005) and variability and energy consumption of the angles in the anterior–posterior axis (p = 0.028, p = 0.028), medial–lateral axis (p = 0.014, p = 0.014), and vertical axis (p = 0.002, p < 0.001). Our study demonstrated that a single IMU on the posterior heel of the dominant side can address the variability of kinematics parameters for elderly performing prolonged brisk walking and could serve as an indicator for walking instability, and thus fatigue.
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Affiliation(s)
- Guoxin Zhang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Ivy Kwan-Kei Wong
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Tony Lin-Wei Chen
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Tommy Tung-Ho Hong
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Duo Wai-Chi Wong
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
- Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen 518057, China
| | - Yinghu Peng
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Fei Yan
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Yan Wang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
- Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen 518057, China
| | - Qitao Tan
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
| | - Ming Zhang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China; (G.Z.); (I.K.-K.W.); (T.L.-W.C.); (T.T.-H.H.); (D.W.-C.W.); (Y.P.); (F.Y.); (Y.W.); (Q.T.)
- Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen 518057, China
- Correspondence: ; Tel.: +852-2766-4939
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20
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Shah VV, McNames J, Mancini M, Carlson-Kuhta P, Spain RI, Nutt JG, El-Gohary M, Curtze C, Horak FB. Laboratory versus daily life gait characteristics in patients with multiple sclerosis, Parkinson's disease, and matched controls. J Neuroeng Rehabil 2020; 17:159. [PMID: 33261625 PMCID: PMC7708140 DOI: 10.1186/s12984-020-00781-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/25/2020] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND AND PURPOSE Recent findings suggest that a gait assessment at a discrete moment in a clinic or laboratory setting may not reflect functional, everyday mobility. As a step towards better understanding gait during daily life in neurological populations, we compared gait measures that best discriminated people with multiple sclerosis (MS) and people with Parkinson's Disease (PD) from their respective, age-matched, healthy control subjects (MS-Ctl, PD-Ctl) in laboratory tests versus a week of daily life monitoring. METHODS We recruited 15 people with MS (age mean ± SD: 49 ± 10 years), 16 MS-Ctl (45 ± 11 years), 16 people with idiopathic PD (71 ± 5 years), and 15 PD-Ctl (69 ± 7 years). Subjects wore 3 inertial sensors (one each foot and lower back) in the laboratory followed by 7 days during daily life. Mann-Whitney U test and area under the curve (AUC) compared differences between PD and PD-Ctl, and between MS and MS-Ctl in the laboratory and in daily life. RESULTS Participants wore sensors for 60-68 h in daily life. Measures that best discriminated gait characteristics in people with MS and PD from their respective control groups were different between the laboratory gait test and a week of daily life. Specifically, the toe-off angle best discriminated MS versus MS-Ctl in the laboratory (AUC [95% CI] = 0.80 [0.63-0.96]) whereas gait speed in daily life (AUC = 0.84 [0.69-1.00]). In contrast, the lumbar coronal range of motion best discriminated PD versus PD-Ctl in the laboratory (AUC = 0.78 [0.59-0.96]) whereas foot-strike angle in daily life (AUC = 0.84 [0.70-0.98]). AUCs were larger in daily life compared to the laboratory. CONCLUSIONS Larger AUC for daily life gait measures compared to the laboratory gait measures suggest that daily life monitoring may be more sensitive to impairments from neurological disease, but each neurological disease may require different gait outcome measures.
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Affiliation(s)
- Vrutangkumar V Shah
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA.
| | - James McNames
- Department of Electrical and Computer Engineering, Portland State University, Portland, OR, USA
- APDM Wearable Technologies, Portland, OR, USA
| | - Martina Mancini
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
| | - Patricia Carlson-Kuhta
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
| | - Rebecca I Spain
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
- Veterans Affairs Portland Health Care System, Portland, OR, USA
| | - John G Nutt
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
| | | | - Carolin Curtze
- Department of Biomechanics, University of Nebraska At Omaha, Omaha, NE, USA
| | - Fay B Horak
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239-3098, USA
- APDM Wearable Technologies, Portland, OR, USA
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21
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Taborri J, Studer V, Grossi P, Brambilla L, Patanè F, Ferrò MT, Mantegazza R, Rossi S. Reliability and Repeatability Analysis of Indices to Measure Gait Deterioration in MS Patients during Prolonged Walking. SENSORS (BASEL, SWITZERLAND) 2020; 20:E5063. [PMID: 32899946 PMCID: PMC7570495 DOI: 10.3390/s20185063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/31/2020] [Accepted: 09/04/2020] [Indexed: 11/23/2022]
Abstract
Gait deterioration caused by prolonged walking represents one of the main consequences of multiple sclerosis (MS). This study aims at proposing quantitative indices to measure the gait deterioration effects. The experimental protocol consisted in a 6-min walking test and it involved nine patients with MS and twenty-six healthy subjects. Pathology severity was assessed through the Expanded Disability Status Scale. Seven inertial units were used to gather lower limb kinematics. Gait variability and asymmetry were assessed by coefficient of variation (CoV) and symmetry index (SI), respectively. The evolution of ROM (range of motion), CoV, and SI was computed analyzing data divided into six 60-s subgroups. Maximum difference among subgroups and the difference between the first minute and the remaining five were computed. The indices were analyzed for intra- and inter-day reliability and repeatability. Correlation with clinical scores was also evaluated. Good to excellent reliability was found for all indices. The computed standard deviations allowed us to affirm the good repeatability of the indices. The outcomes suggested walking-related fatigue leads to an always more variable kinematics in MS, in terms of changes in ROM, increase of variability and asymmetry. The hip asymmetry strongly correlated with the clinical disability.
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Affiliation(s)
- Juri Taborri
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, 01100 Viterbo, Italy;
| | - Valeria Studer
- Multiple Sclerosis Center, Neurology Department, Martini Hospital, 10121 Turin, Italy;
| | - Paola Grossi
- Neuroimmunology Center for Multiple Sclerosis, Cerebrovascular Department, ASST Crema, 52242 Crema, Italy; (P.G.); (M.T.F.)
| | - Laura Brambilla
- Operating Units of Autoimmune and Neuromuscular Diseases, IRCCS Foundation Neurological Institute Carlo Besta, 20133 Milano, Italy; (L.B.); (R.M.)
| | - Fabrizio Patanè
- Department of Engineering, Mech. Meas. and Microelectr.lab (M3lab), University Niccolò Cusano, 00166 Rome, Italy;
| | - Maria Teresa Ferrò
- Neuroimmunology Center for Multiple Sclerosis, Cerebrovascular Department, ASST Crema, 52242 Crema, Italy; (P.G.); (M.T.F.)
| | - Renato Mantegazza
- Operating Units of Autoimmune and Neuromuscular Diseases, IRCCS Foundation Neurological Institute Carlo Besta, 20133 Milano, Italy; (L.B.); (R.M.)
| | - Stefano Rossi
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, 01100 Viterbo, Italy;
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22
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Erdeo F, Salcı Y, Uca AU, Armutlu K. Examination of the effects of coordination and balance problems on gait in ataxic multiple sclerosis patients. ACTA ACUST UNITED AC 2020; 24:269-277. [PMID: 31872805 PMCID: PMC8015554 DOI: 10.17712/nsj.2019.4.20190038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the effects of coordination and balance problems on gait and plantar pressure distribution in multiple sclerosis patients. METHODS This was an observational, cross-sectional study. It was conducted at Necmettin Erbakan University between March and December 2017. Twenty-four individuals with coordination problems, 36 individuals with balance problems and 32 healthy individuals were included in the study. The EDSS, Functional Reach Test, Dynamic Gait Index, baropodometry and stabilometry evaluations were performed. RESULTS There were significant differences between the groups (velocity p=0.000, cadence p=0.000, step width p=0.018, step length p=0.000, foot angle p=0.000). Multiple comparisons demonstrated that the velocities and cadences of the coordination group were lower, while their step widths were found to be higher, compared to the balance group (p=0.012, p=0.004, p=0.017, respectively). In static plantar pressure distribution, lateral forefoot pressure, lateral hindfoot pressure and medial hindfoot pressure were significantly different between the groups (p=0.002, p=0.000, respectively) Multiple comparisons showed that the pressure on the lateral part of the hindfoot in the coordination group was found to be significantly higher compared to the balance group (p=0.002). According to the dynamic plantar pressure distribution, lateral forefoot, medial forefoot, lateral hindfoot and medial hindfoot pressures were significantly different between the groups (p<0.05). CONCLUSION Coordination and balance problems affect gait and plantar pressure distribution. The identification of these changes will help physiotherapists determine specific therapeutic targets.
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Affiliation(s)
- Fatma Erdeo
- Department of Physiotherapy, Faculty of Health Science, Necmettin Erbakan University, Konya, Turkey. E-mail:
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Gait Variability and Energy Cost of Oveground Walking in Persons With Multiple Sclerosis: A Cross-Sectional Study. Am J Phys Med Rehabil 2019; 97:646-650. [PMID: 29595583 DOI: 10.1097/phm.0000000000000935] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE This study examined the associations between gait variability based on common spatiotemporal parameters and energetic cost of walking in persons with multiple sclerosis. DESIGN Eighty-six persons with multiple sclerosis underwent the 6-min walk while wearing a portable metabolic unit. The cost of walking was generated by dividing the net steady-state VO2 (milliliter per kilogram per minute) by walking speed during the 6-min walk. Participants further completed two trials of walking on the GAITRite mat at a self-selected pace for measuring spatiotemporal parameters. Variability of step length, step time, stride length, swing time, stance time, stride velocity, and single- and double-support time was indexed by the coefficient of variation. RESULTS Variability in the spatiotemporal variables and Expanded Disability Status Scale scores were significantly correlated with cost of walking (i.e., ρ = 0.25-0.36). Multivariate analysis revealed that disability (Expanded Disability Status Scale: β = 0.186), stance time variability (β = 1.446), and step length variability (β = -1.216) explained significant variance (R(2) = 0.38, P < 0.001) in cost of walking. CONCLUSIONS We provide evidence of the positive association between gait variability and cost of walking during overground walking in persons with multiple sclerosis. The findings highlight the need for interventions aiming to reduce gait variability, thereby reducing the energetic demands of walking in this population.
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Kaur R, Menon S, Zhang X, Sowers R, Hernandez ME. Exploring Characteristic Features in Gait Patterns for Predicting Multiple Sclerosis. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2019; 2019:4217-4220. [PMID: 31946799 DOI: 10.1109/embc.2019.8857604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multiple Sclerosis (MS), an autoimmune and demyelinating disease, is one the most prevalent neurological disabilities in young adults. It results in damage of the central nervous system, disrupting communication between the patient's brain, spinal cord and body. Mobility limitations is one of the earliest symptoms and affects a majority of persons with Multiple Sclerosis. We are working towards an effort to characterize individuals with MS, from those without, on the basis of variations in the gait patterns. In the proposed work, statistical methods were used to identify differentiating gait data features for MS characterization. The prediction algorithms built upon these characteristic features will help clinicians develop effective and early cure and therapy designs for persons with Multiple Sclerosis.
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Miller Renfrew L, Flowers P, Lord AC, Rafferty D, McFadyen AK, Bowers R, Mattison P, Paul L. An exploration of the experiences and utility of functional electrical stimulation for foot drop in people with multiple sclerosis. Disabil Rehabil 2018; 42:510-518. [PMID: 30299176 DOI: 10.1080/09638288.2018.1501100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Purpose: Functional electrical stimulation (FES) is effective in improving walking in people with multiple sclerosis (MS) with foot drop. There is limited research exploring people's experiences of using this device. This study aims to explore the utility, efficacy, acceptability, and impact on daily life of the device in people with MS.Methods: An interpretative phenomenological approach was employed. Ten participants who had used FES for 12 months were interviewed. Transcripts were analysed, and emergent themes identified.Results: Nine participants continued to use the device. Three relevant super-ordinate themes were identified; impact of functional electrical stimulation, sticking with functional electrical stimulation, and autonomy and control. Participants reported challenges using the device; however, all reported positive physical and psychological benefits. Intrinsic and external influences such as; access to professional help, the influence of others, an individual's ability to adapt, and experiences using the device, influenced their decisions to continue with the device. A thematic model of these factors was developed.Conclusions: This study has contributed to our understanding of people with MS experiences of using the device and will help inform prescribing decisions and support the continued, appropriate use of FES over the longer term.Implications for RehabilitationPeople with multiple sclerosis using functional electrical stimulation report benefits in many aspects of walking, improved psychological well-being and increased engagement in valued activities.A number of challenges impact on functional electrical stimulation use. Factors such as; a positive experience using the device, access to professional help, the influence of others, a strong sense of personal autonomy and an individual's ability to adapt, influence an individual's decision to continue using functional electrical stimulation.Clinicians prescribing functional electrical stimulation should be aware of these factors so that the right support and guidance can be provided to people with multiple sclerosis, thus improving outcomes and compliance over the long term.
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Affiliation(s)
- Linda Miller Renfrew
- MS Service, Douglas Grant Rehabilitation Centre, Irvine, UK.,School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Paul Flowers
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Anna C Lord
- MS Service, Douglas Grant Rehabilitation Centre, Irvine, UK
| | - Danny Rafferty
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | | | - Roy Bowers
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
| | - Paul Mattison
- MS Service, Douglas Grant Rehabilitation Centre, Irvine, UK
| | - Lorna Paul
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
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Baghdadi A, Megahed FM, Esfahani ET, Cavuoto LA. A machine learning approach to detect changes in gait parameters following a fatiguing occupational task. ERGONOMICS 2018; 61:1116-1129. [PMID: 29452575 DOI: 10.1080/00140139.2018.1442936] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 02/13/2018] [Indexed: 06/08/2023]
Abstract
The purpose of this study is to provide a method for classifying non-fatigued vs. fatigued states following manual material handling. A method of template matching pattern recognition for feature extraction ($1 Recognizer) along with the support vector machine model for classification were applied on the kinematics of gait cycles segmented by our stepwise search-based segmentation algorithm. A single inertial measurement unit on the ankle was used, providing a minimally intrusive and inexpensive tool for monitoring. The classifier distinguished between states using distance-based scores from the recogniser and the step duration. The results of fatigue detection showed an accuracy of 90% across data from 20 recruited subjects. This method utilises the minimum amount of data and features from only one low-cost sensor to reliably classify the state of fatigue induced by a realistic manufacturing task using a simple machine learning algorithm that can be extended to real-time fatigue monitoring as a future technology to be employed in the manufacturing facilities. Practitioner Summary: We examined the use of a wearable sensor for the detection of fatigue-related changes in gait based on a simulated manual material handling task. Classification based on foot acceleration and position trajectories resulted in 90% accuracy. This method provides a practical framework for predicting realistic levels of fatigue.
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Affiliation(s)
- Amir Baghdadi
- a Department of Industrial and Systems Engineering , University at Buffalo, The State University of New York , Buffalo , NY , USA
- b Department of Mechanical and Aerospace Engineering , University at Buffalo, The State University of New York , Buffalo , NY , USA
| | - Fadel M Megahed
- c Farmer School of Business , Miami University , Oxford , OH , USA
| | - Ehsan T Esfahani
- b Department of Mechanical and Aerospace Engineering , University at Buffalo, The State University of New York , Buffalo , NY , USA
| | - Lora A Cavuoto
- a Department of Industrial and Systems Engineering , University at Buffalo, The State University of New York , Buffalo , NY , USA
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Karpatkin H, Babyar S, DiCarrado S, McDarby M, Narovlianski M, Perez B, Rimawi I. Increases in fatigue do not change spasticity scores in persons with multiple sclerosis. Neurodegener Dis Manag 2018; 8:143-150. [PMID: 29943692 DOI: 10.2217/nmt-2017-0049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
AIM Fatigue is a common finding in multiple sclerosis (MS) which may result in worsening of gait, function and other MS symptoms, like spasticity. Although the worsening of spasticity with fatigue has been reported by persons with MS, the effect of fatigue on spasticity has not been measured. PURPOSE The purpose of this study was to compare lower extremity Modified Ashworth Scale (MAS) scores of persons with mild-to-moderate MS symptoms before and after fatigued and unfatigued conditions. METHODS Using a randomized crossover design, MS subjects underwent 6-min walk to induce fatigue and 6-min supine rests, with lower extremity spasticity measured before and after each condition. Friedman tests gave paired comparisons of MAS before and after each condition. RESULTS 16 subjects with mild-to-moderate MS completed the study (mean age = 56; standard deviation = 11.7). Friedman tests showed a significant decrease in mean rank for overall average MAS for both lower extremities (p = 0.031) when comparing fatigued to unfatigued conditions. This appeared to be driven by the right lower extremity average MAS (p = 0.002) and, more specifically, in post hoc pre to post-test comparisons for right knee flexor (p = 0.002 fatigued; p = 0.059 unfatigued) and right knee extensor (p = 0.001 fatigued; p = 0.020 unfatigued) MAS mean rank differences. Fatigue did not result in increased spasticity. CONCLUSION Spasticity in these subjects with MS was not worsened by fatigue suggesting that worsening of gait with fatigue may be due to causes other than spasticity.
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Affiliation(s)
- Herbert Karpatkin
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
| | - Suzanne Babyar
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
| | - Stefanie DiCarrado
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
| | - Melissa McDarby
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
| | - Morris Narovlianski
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
| | - Beremis Perez
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
| | - Iman Rimawi
- Department of Physical Therapy, Hunter College, The City University of New York, New York, NY 10010, USA
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Horn KK, Allen DD, Gibson-Horn C, Widener GL. Effects of Torso-Weighting on Standing Balance and Falls During the Sensory Organization Test in People with Multiple Sclerosis. Int J MS Care 2018; 20:68-75. [PMID: 29681777 DOI: 10.7224/1537-2073.2015-090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Background In people with multiple sclerosis (MS), common gait and balance impairments can lead to falls, fear of falling, activity restriction, and social isolation. Sensory augmentation in the form of torso-weighting has resulted in improvement in gait and balance, but research on its effect on falls in MS is lacking. Methods 60 people with MS and 10 bin-matched controls completed the Sensory Organization Test (SOT) while nonweighted and again while weighted using the Balance-Based Torso-Weighting assessment method. This was a quasi-experimental pre-post intervention study. The SOT composite scores, equilibrium scores, and number of falls occurring across six SOT conditions were compared between and within groups using 2-way analysis of variance, α = .05 with planned t test analyses of weighting effects. Results A significant increase in composite score of 9.14 points nonweighted to weighted occurred in the MS group (P < .001) but not in controls (P = .626). Equilibrium scores were significantly higher with weights in the MS group (P < .001) but not in controls (P = .5). Falls during the SOT were reduced by 35% with weights in the MS group versus without weights (P < .001), with the greatest number of falls occurring in the most challenging SOT conditions. Conclusions During a single testing session, torso-weighting produced significant improvements in postural stability and fall reduction during the SOT for people with MS but no change in controls. Further research is needed to determine whether torso-weighting has the potential to reduce falls in MS during real-world activities.
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Miller Renfrew L, Lord AC, McFadyen AK, Rafferty D, Hunter R, Bowers R, Mattison P, Moseley O, Paul L. A comparison of the initial orthotic effects of functional electrical stimulation and ankle-foot orthoses on the speed and oxygen cost of gait in multiple sclerosis. J Rehabil Assist Technol Eng 2018; 5:2055668318755071. [PMID: 31191925 PMCID: PMC6453037 DOI: 10.1177/2055668318755071] [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] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 12/14/2017] [Indexed: 11/17/2022] Open
Abstract
Background Foot drop affects walking in people with multiple sclerosis (pwMS). This study compares the initial orthotic effects of two treatments for foot drop: ankle-foot orthoses (AFO) and functional electrical stimulation (FES), on the speed and oxygen cost of walking in MS. Method and materials Seventy-eight pwMS were randomised to receive AFO or FES (ODFS PACE (OML, Salisbury, UK)). Participants completed the 25-ft walk test (25ftWT) and 5-min self-selected walk test (5minSSWT), from which oxygen cost was determined, with and without their device. Between-, within- and sub-group analyses (based on baseline walking speed of <0.8 m/s (slow) or ≥0.8 m/s (fast)) were undertaken. Results No significant differences between baseline measures were observed. The AFO group walked significantly slower than the FES group (5minSSWT, p = 0.037, 0.11 m/s). The AFO group walked significantly slower with than without AFO (25ftWT, p = 0.037), particularly in the fast-walking group ( p = 0.011). The slow-walking FES group walked significantly faster with FES than without (25ftWT; p = 0.029, 5minSSWT; p = 0.037). There were no differences in the fast-walking FES group or in the oxygen cost for either device. Conclusion AFO reduced walking speed, particularly in fast walkers. FES increased walking speed in slow, but not fast walkers.
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Affiliation(s)
- Linda Miller Renfrew
- Douglas Grant Rehabilitation Unit, Irvine, UK.,2School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Anna C Lord
- Douglas Grant Rehabilitation Unit, Irvine, UK
| | | | - Danny Rafferty
- 2School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | | | - Roy Bowers
- 4Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
| | | | | | - Lorna Paul
- 2School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
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Gümüş H. Fatigue Can Be Objectively Measured in Multiple Sclerosis: Multipl Sklerozda Yorgunluk Objektif Olarak Ölçülebilir. ACTA ACUST UNITED AC 2018; 55:S76-S79. [PMID: 30692862 DOI: 10.29399/npa.23396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Multiple Sclerosis (MS), is a chronic inflammatory demyelinating disorder affecting the white matter in the central nervous system (CNS), seen usually among young adults (20-40 years of age). Fatigue is an important symptom that affects a large portion of the patient population. The reason for fatigue seen in MS patients is still not well-known. Fatigue is a subjective and non-specific symptom; therefore, it is quite difficult to evaluate fatigue. This symptom has been reported in 75-87% of patients with multiple sclerosis (MS) and two-thirds of these patients indicated fatigue as one of the worst three common symptoms they experienced. In this review, objective measurement methods of fatigue which is a subjective complaint will be discussed.
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Affiliation(s)
- Haluk Gümüş
- Department of Neurology, Selçuk University School of Medicine, Konya, Turkey
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Abstract
Multiple sclerosis (MS) is a chronic disease of the central nervous system (CNS) and the most widespread nontraumatic cause of disability in young adults around the world. MS occurs in people of all ages, races, and ethnicities. MS is characterized by clinical symptoms resulting from lesions in the brain, spinal cord, or optic nerves that can affect balance, gait, and fall risk. Lesions accumulate over time and occur in different areas of the CNS causing symptoms that include weakness, spasticity, and fatigue, as well as changes in sensation, coordination, vision, cognition, and bladder function. Thus, it is not surprising that imbalance, gait dysfunction, and falls are common in people with MS. The overwhelming majority have abnormalities of postural control and gait even early in the disease course. In all, 50-80% have balance and gait dysfunction and over 50% fall at least once each year. Balance dysfunction in MS is conceptualized as three interrelated problems: decreased ability to maintain position, limited and slowed movement towards limits of stability, and delayed responses to postural displacements and perturbations. In addition, functional balance performance may be affected by impaired dual-task integration. Walking changes in MS include reduced gait speed, impaired walking balance, and reduced walking-related physical activity. Falls in people with MS are associated with injuries, reduced participation, and increased fear of falling. A wide and growing range of rehabilitation and medical interventions are available to address the changes in balance, gait, and fall risk associated with MS.
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Affiliation(s)
- Michelle H Cameron
- Department of Neurology, Oregon Health and Science University, Portland, OR, United States.
| | - Ylva Nilsagard
- Department of Neurology, Oregon Health and Science University, Portland, OR, United States
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Dalla-Costa G, Radaelli M, Maida S, Sangalli F, Colombo B, Moiola L, Comi G, Martinelli V. Smart watch, smarter EDSS: Improving disability assessment in multiple sclerosis clinical practice. J Neurol Sci 2017; 383:166-168. [PMID: 29246607 DOI: 10.1016/j.jns.2017.10.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 10/19/2017] [Accepted: 10/26/2017] [Indexed: 11/25/2022]
Abstract
BACKGROUND Patients' walking ability is critical for assessing the EDSS, the disability scale commonly used in MS clinical practice. Such assessment is usually based on patients' estimates or on the measures the neurologists observe during periodic visits. OBJECTIVES AND METHODS We evaluated the agreement between patients' and neurologists' estimates of maximum walking ability and patients' mean maximum walking ability measured in their daily life through a GPS smartwatch, and assessed limitations of the current methods. RESULTS Seventy-three patients with a median walking ability of 500m (IQR 400-800) were enrolled in the study. The agreement between patients' estimates and GPS measurements was modest (ICC 0.29, 95% CIs 0.06-0.49) and was influenced by course of the disease, patients' mood and inaccuracy at estimating long distances. A better reliability was found between neurologists' and GPS measures (ICC 0.68, 95% CIs 0.53-0.78), but the variability increased for longer distances and was influenced by patients' depressive symptoms, fatigue and course of the disease. CONCLUSIONS This study showed a poor agreement between patients' and neurologists' estimates of maximum walking ability and patients' mean maximum walking ability measured in their daily life through a GPS smartwatch, with many factors affecting patient's and neurologists' estimates of the EDSS. The use of remote measurement technologies may provide a better understanding of the impact of MS in a patient's life.
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Affiliation(s)
| | - Marta Radaelli
- Department of Neurology, San Raffaele Hospital, Milan, Italy
| | - Simona Maida
- Department of Neurology, San Raffaele Hospital, Milan, Italy
| | | | - Bruno Colombo
- Department of Neurology, San Raffaele Hospital, Milan, Italy
| | - Lucia Moiola
- Department of Neurology, San Raffaele Hospital, Milan, Italy
| | - Giancarlo Comi
- Department of Neurology, San Raffaele Hospital, Milan, Italy
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Loy BD, Taylor RL, Fling BW, Horak FB. Relationship between perceived fatigue and performance fatigability in people with multiple sclerosis: A systematic review and meta-analysis. J Psychosom Res 2017; 100:1-7. [PMID: 28789787 PMCID: PMC5875709 DOI: 10.1016/j.jpsychores.2017.06.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 06/23/2017] [Accepted: 06/23/2017] [Indexed: 01/14/2023]
Abstract
BACKGROUND Perceived fatigue (i.e., subjective perception of reduced capacity) is one of the most common and disabling symptoms for people with multiple sclerosis (MS). Perceived fatigue may also be related to performance fatigability (i.e., decline in physical performance over time), although study findings have been inconsistent. OBJECTIVE To locate all studies reporting the relationship between perceived fatigue and fatigability in people with MS, determine the population correlation, and examine moderating variables of the correlation size. METHODS In accordance with PRISMA guidelines, systematic searches were completed in Medline, PsychInfo, Google Scholar, and the Cochrane Library for peer-reviewed articles published between March 1983 and August 2016. Included articles measured perceived fatigue and performance fatigability in people with MS and provided a correlation between measures. Moderator variables expected to influence the relationship were also coded. Searches located 19 studies of 848 people with MS and a random-effects model was used to pool correlations. RESULTS The mean correlation between fatigue and fatigability was positive, "medium" in magnitude, and statistically significant, r=0.31 (95% CI=0.21, 0.42), p<0.001. Despite moderate between-study heterogeneity (I2=46%) no statistically significant moderators were found, perhaps due to the small number of studies per moderator category. CONCLUSION There is a significant relationship between perceived fatigue and fatigability in MS, such that people reporting elevated fatigue also are highly fatigable. The size of the relationship is not large enough to suggest fatigue and fatigability are the same construct, and both should continue to be assessed independently.
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Affiliation(s)
- Bryan D Loy
- Department of Neurology, Oregon Health & Science University, Portland, OR, United States.
| | - Ruby L Taylor
- Department of Neurology, Oregon Health & Science University, Portland, OR, United States; Department of Public Health, Santa Clara University, Santa Clara, CA, United States.
| | - Brett W Fling
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO, United States.
| | - Fay B Horak
- Department of Neurology, Oregon Health & Science University, Portland, OR, United States; Veterans Affairs Portland Health Care System, Portland, OR, United States.
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Short-Term and Long-Term Effects of an Exercise-Based Patient Education Programme in People with Multiple Sclerosis: A Pilot Study. Mult Scler Int 2017; 2017:2826532. [PMID: 28900546 PMCID: PMC5576429 DOI: 10.1155/2017/2826532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 07/07/2017] [Accepted: 07/16/2017] [Indexed: 11/21/2022] Open
Abstract
Background. Although people with Multiple Sclerosis (pwMS) benefit from physical exercise, they still show reduced physical activity and exercise behaviour. This study aimed to investigate short- and long-term effects of an exercise-based patient education programme (ePEP) that focuses on empowering pwMS to a sustainable and self-regulated exercise training management. Methods. Fourteen pwMS were randomly assigned to immediate experimental group (EG-I: n = 8) and waitlist-control group (EG-W: n = 6) and attended biweekly in a six-week ePEP. All participants were measured for walking ability, quality of life, fatigue, and self-efficacy towards physical exercise before and after the ePEP, after 12 weeks, and one year after baseline. Short-term effects were analysed in a randomised control trial and long-term effects of all ePEP participants (EG-I + EG-W = EG-all) in a quasi-experimental design. Results. Only functional gait significantly improved in EG-I compared to EG-W (p = 0.008, r = −0.67). Moderate to large effects were found in EG-all for walking ability. Not significant, however, relevant changes were detected for quality of life and fatigue. Self-efficacy showed no changes. Conclusion. The ePEP seems to be a feasible option to empower pwMS to a self-regulated and sustainable exercise training management shown in long-term walking improvements.
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Severini G, Manca M, Ferraresi G, Caniatti LM, Cosma M, Baldasso F, Straudi S, Morelli M, Basaglia N. Evaluation of Clinical Gait Analysis parameters in patients affected by Multiple Sclerosis: Analysis of kinematics. Clin Biomech (Bristol, Avon) 2017; 45:1-8. [PMID: 28390935 DOI: 10.1016/j.clinbiomech.2017.04.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 03/10/2017] [Accepted: 04/02/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Clinical Gait Analysis is commonly used to evaluate specific gait characteristics of patients affected by Multiple Sclerosis. The aim of this report is to present a retrospective cross-sectional analysis of the changes in Clinical Gait Analysis parameters in patients affected by Multiple Sclerosis. METHODS In this study a sample of 51 patients with different levels of disability (Expanded Disability Status Scale 2-6.5) was analyzed. We extracted a set of 52 parameters from the Clinical Gait Analysis of each patient and used statistical analysis and linear regression to assess differences among several groups of subjects stratified according to the Expanded Disability Status Scale and 6-Minutes Walking Test. The impact of assistive devices (e.g. canes and crutches) on the kinematics was also assessed in a subsample of patients. FINDINGS Subjects showed decreased range of motion at hip, knee and ankle that translated in increased pelvic tilt and hiking. Comparison between the two stratifications showed that gait speed during 6-Minutes Walking Test is better at discriminating patients' kinematics with respect to Expanded Disability Status Scale. Assistive devices were shown not to significantly impact gait kinematics and the Clinical Gait Analysis parameters analyzed. INTERPRETATION We were able to characterize disability-related trends in gait kinematics. The results presented in this report provide a small atlas of the changes in gait characteristics associated with different disability levels in the Multiple Sclerosis population. This information could be used to effectively track the progression of MS and the effect of different therapies.
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Affiliation(s)
- Giacomo Severini
- School of Electrical and Electronic Engineering, University College Dublin, Dublin, Ireland.
| | - Mario Manca
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Giovanni Ferraresi
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Luisa Maria Caniatti
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Michela Cosma
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Francesco Baldasso
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Sofia Straudi
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Monica Morelli
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
| | - Nino Basaglia
- Neuroscience and Rehabilitation Department, Ferrara University Hospital, Via della Fiera, 44100 Ferrara, Italy
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Craig JJ, Bruetsch AP, Lynch SG, Horak FB, Huisinga JM. Instrumented balance and walking assessments in persons with multiple sclerosis show strong test-retest reliability. J Neuroeng Rehabil 2017; 14:43. [PMID: 28532417 PMCID: PMC5441007 DOI: 10.1186/s12984-017-0251-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 05/12/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There is a need for objective movement assessment for clinical research trials aimed at improving gait and balance in persons with multiple sclerosis (PwMS). Wireless inertial sensors can accurately measure numerous walking and balance parameters but these measures require evaluation of reliability in PwMS. The current study determined the test-retest reliability of wireless inertial sensor measures obtained during an instrumented standing balance test and an instrumented Timed Up and Go test in PwMS. METHODS Fifteen PwMS and 15 healthy control subjects (HC) performed an instrumented standing balance and instrumented Timed Up and Go (TUG) test on two separate days. Ten instrumented standing balance measures and 18 instrumented TUG measures were computed from the wireless sensor data. Intraclass correlation coefficients (ICC) were calculated to determine test-retest reliability of all instrumented standing balance and instrumented TUG measures. Correlations were evaluated between the instrumented standing balance and instrumented TUG measures and self-reported walking and balance performance, fall history, and clinical disability. RESULTS For both groups, ICCs for instrumented standing balance measures were best for spatio-temporal measures, while frequency measures were less reliable. All instrumented TUG measures exhibited good to excellent (ICCs > 0.60) test-retest reliability in PwMS and in HC. There were no correlations between self-report walking and balance scores and instrumented TUG or instrumented standing balance metrics, but there were correlations between instrumented TUG and instrumented standing balance metrics and fall history and clinical disability status. CONCLUSIONS Measures from the instrumented standing balance and instrumented TUG tests exhibit good to excellent reliability, demonstrating their potential as objective assessments for clinical trials. A subset of the most reliable measures is recommended for measuring walking and balance in clinical settings.
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Affiliation(s)
- Jordan J Craig
- Landon Center on Aging, University of Kansas Medical Center, 3901 Rainbow Blvd., Mail Stop 1005, Kansas City, KS, 66160, USA.,Bioengineering Graduate Program, University of Kansas, 3135A Learned Hall, 1530 W 15th St, Lawrence, KS, 66045, USA
| | - Adam P Bruetsch
- Landon Center on Aging, University of Kansas Medical Center, 3901 Rainbow Blvd., Mail Stop 1005, Kansas City, KS, 66160, USA
| | - Sharon G Lynch
- Department of Neurology, University of Kansas Medical Center, 3901 Rainbow Blvd., Mail Stop 2002, Kansas City, KS, 66160, USA
| | - Fay B Horak
- Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, L226, Portland, Oregon, 97239-3098, USA
| | - Jessie M Huisinga
- Landon Center on Aging, University of Kansas Medical Center, 3901 Rainbow Blvd., Mail Stop 1005, Kansas City, KS, 66160, USA. .,Bioengineering Graduate Program, University of Kansas, 3135A Learned Hall, 1530 W 15th St, Lawrence, KS, 66045, USA. .,Department of Neurology, University of Kansas Medical Center, 3901 Rainbow Blvd., Mail Stop 2002, Kansas City, KS, 66160, USA.
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37
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Ayache SS, Chalah MA. Fatigue in multiple sclerosis – Insights into evaluation and management. Neurophysiol Clin 2017; 47:139-171. [DOI: 10.1016/j.neucli.2017.02.004] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Accepted: 02/15/2017] [Indexed: 12/20/2022] Open
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Tracking daily fatigue fluctuations in multiple sclerosis: ecological momentary assessment provides unique insights. J Behav Med 2017; 40:772-783. [PMID: 28281106 PMCID: PMC5613039 DOI: 10.1007/s10865-017-9840-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 02/28/2017] [Indexed: 12/03/2022]
Abstract
Studies investigating the prevalence, cause, and consequence of multiple sclerosis (MS) fatigue typically use single measures that implicitly assume symptom-stability over time, neglecting information about if, when, and why severity fluctuates. We aimed to examine the extent of moment-to-moment and day-to-day variability in fatigue in relapsing-remitting MS and healthy individuals, and identify daily life determinants of fluctuations. Over 4 weekdays, 76 participants (38 relapsing-remitting MS; 38 controls) recruited from multiple sites provided real-time self-reports six times daily (n = 1661 observations analyzed) measuring fatigue severity, stressors, mood, and physical exertion, and daily self-reports of sleep quality. Fatigue fluctuations were evident in both groups. Fatigue was highest in relapsing-remitting MS, typically peaking in late-afternoon. In controls, fatigue started lower and increased steadily until bedtime. Real-time stressors and negative mood were associated with increased fatigue, and positive mood with decreased fatigue in both groups. Increased fatigue was related to physical exertion in relapsing-remitting MS, and poorer sleep quality in controls. In relapsing-remitting MS, fatigue fluctuates substantially over time. Many daily life determinants of fluctuations are similar in relapsing-remitting MS and healthy individuals (stressors, mood) but physical exertion seems more relevant in relapsing-remitting MS and sleep quality most relevant in healthy individuals.
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Comber L, Galvin R, Coote S. Gait deficits in people with multiple sclerosis: A systematic review and meta-analysis. Gait Posture 2017; 51:25-35. [PMID: 27693958 DOI: 10.1016/j.gaitpost.2016.09.026] [Citation(s) in RCA: 178] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 09/19/2016] [Accepted: 09/26/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND Multiple Sclerosis (MS) results in postural instability and gait abnormalities which are associated with accidental falls. OBJECTIVE This systematic review and meta-analysis aims to quantify the effect of MS on gait to inform the development of falls prevention interventions. METHODS A systematic literature search identified case-control studies investigating differences in gait variables between people with MS and healthy controls. Meta-analysis examined the effect of MS on gait under normal and fast paced conditions. RESULTS Forty-one studies of people with Expanded Disability Status Scale (EDSS) 1.8 to 4.5 were included, of which 32 contributed to meta-analysis. A large effect of MS was found on stride length (Standardised Mean Difference, SMD=1.27, 95% CI{0.93, 1.61}), velocity (SMD=1.12, 95% CI{0.85, 1.39}), double support duration (SMD=0.85, 95% CI{0.51, 1.2}), step length (SMD=1.15, 95% CI{0.75, 1.5})and swing phase duration (SMD=1.23, 95% CI{0.06, 2.41}). A moderate effect was found on step width and stride time with the smallest effect found on cadence (SMD=0.43, 95% CI{0.14, 0.72}). All effect sizes increased for variables investigated under a fast walking pace condition (for example the effect on cadence increased to SMD=1.15, 95% CI{0.42, 1.88}). CONCLUSIONS MS has a significant effect on gait even for those with relatively low EDSS. This effect is amplified when walking at faster speeds suggesting this condition may be more beneficial for assessment and treatment. No studies investigated the association between these deficits and falls. Further investigation relating to the predictive or protective nature of these deficits in relation to falls is warranted.
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Affiliation(s)
- Laura Comber
- Department of Clinical Therapies, University of Limerick, Ireland.
| | - Rose Galvin
- Department of Clinical Therapies, University of Limerick, Ireland.
| | - Susan Coote
- Department of Clinical Therapies, University of Limerick, Ireland.
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Newly Identified Gait Patterns in Patients With Multiple Sclerosis May Be Related to Push-off Quality. Phys Ther 2016; 96:1744-1752. [PMID: 27174257 DOI: 10.2522/ptj.20150508] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 05/01/2016] [Indexed: 11/17/2022]
Abstract
BACKGROUND Limited walking ability is an important problem for patients with multiple sclerosis. A better understanding of how gait impairments lead to limited walking ability may help to develop more targeted interventions. Although gait classifications are available in cerebral palsy and stroke, relevant knowledge in MS is scarce. OBJECTIVE The aims of this study were: (1) to identify distinctive gait patterns in patients with MS based on a combined evaluation of kinematics, gait features, and muscle activity during walking and (2) to determine the clinical relevance of these gait patterns. DESIGN This was a cross-sectional study of 81 patients with MS of mild-to-moderate severity (Expanded Disability Status Scale [EDSS] median score=3.0, range=1.0-7.0) and an age range of 28 to 69 years. METHOD The patients participated in 2-dimensional video gait analysis, with concurrent measurement of surface electromyography and ground reaction forces. A score chart of 73 gait items was used to rate each gait analysis. A single rater performed the scoring. Latent class analysis was used to identify gait classes. RESULTS Analysis of the 73 gait variables revealed that 9 variables could distinguish 3 clinically meaningful gait classes. The 9 variables were: (1) heel-rise in terminal stance, (2) push-off, (3) clearance in initial swing, (4) plantar-flexion position in mid-swing, (5) pelvic rotation, (6) arm-trunk movement, (7) activity of the gastrocnemius muscle in pre-swing, (8) M-wave, and (9) propulsive force. The EDSS score and gait speed worsened in ascending classes. LIMITATIONS Most participants had mild-to-moderate limitations in walking ability based on their EDSS scores, and the number of walkers who were severely limited was small. CONCLUSIONS Based on a small set of 9 variables measured with 2-dimensional clinical gait analysis, patients with MS could be divided into 3 different gait classes. The gait variables are suggestive of insufficient ankle push-off.
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Pacifici I, Galli M, Kleiner AFR, Corona F, Coghe G, Marongiu E, Loi A, Crisafulli A, Cocco E, Marrosu MG, Pau M. The Required Coefficient of Friction for evaluating gait alterations in people with Multiple Sclerosis during gait. Mult Scler Relat Disord 2016; 10:174-178. [DOI: 10.1016/j.msard.2016.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/05/2016] [Accepted: 10/23/2016] [Indexed: 11/30/2022]
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Thoumie P, Lamotte D, Cantalloube S, Faucher M, Amarenco G. Motor determinants of gait in 100 ambulatory patients with multiple sclerosis. Mult Scler 2016; 11:485-91. [PMID: 16042234 DOI: 10.1191/1352458505ms1176oa] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A prospective analysis of gait and strength parameters was performed in 100 patients diagnosed with MS and pyramidal involvement admitted in a rehabilitation unit. The patients were divided into two groups based on their ability to walk in daily life (nonassisted or cane-assisted gait) and into four clinical subgroups depending on associated involvements such as sensory loss or cerebellar ataxia. Twenty healthy subjects were studied as a control group. Gait parameters were evaluated with a Locometre and muscle strength with an isokinetic dynamometer. The results showed that the average velocity and strength of the hamstring and quadriceps were strongly correlated and reduced in the MS group in comparison with the control, and in the cane-assisted group compared with the nonassisted group. Gait velocity tended to be more correlated to hamstring strength in the nonassisted group with a determination coefficient (r2) reaching a value of 0.44 in the sensory subgroup. These findings provide evidence that a correlation between strength reduction and gait impairment is obvious whatever the clinical form in patients with MS. This correlation is higher with hamstrings but may change depending on the disability level and the clinical form. This could be taken into account in the individual assessment of further rehabilitation programmes.
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Affiliation(s)
- P Thoumie
- Service de Rééducation Neuro-Orthopédique and Inserm U731, Paris, France.
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Newman MA, Dawes H, van den Berg M, Wade DT, Burridge J, Izadi H. Can aerobic treadmill training reduce the effort of walking and fatigue in people with multiple sclerosis: a pilot study. Mult Scler 2016; 13:113-9. [PMID: 17294619 DOI: 10.1177/1352458506071169] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Impaired mobility in multiple sclerosis (MS) is associated with high-energy costs and effort when walking, gait abnormalities, poor endurance and fatigue. This repeated measures trial with blinded assessments investigated the effect of treadmill walking at an aerobic training intensity in 16 adults with MS. The intervention consisted of 12 sessions of up to 30 minutes treadmill training (TT), at 55–85% of age-predicted maximum heart rate. The primary outcome measure was walking effort, measured by oxygen consumption (mL/kg per metre), during treadmill walking at comfortable walking speed (CWS). Associated changes in gait parameters using the ‘Gait-Rite’ mat, 10-m time and 2-minute distance, and Fatigue Severity Scale were examined. Following training, oxygen consumption decreased at rest (P = 0.008), CWS increased (P = 0.002), and 10-m times (P = 0.032) and walking endurance (P = 0.020) increased. At increased CWS, oxygen consumption decreased (P = 0.020), with a decreased time spent in stance in the weaker leg (P = 0.034), and a greater stride distance with the stronger leg (P = 0.044). Reported fatigue levels remained the same. Aerobic TT presents the opportunity to alter a motor skill and reduce the effort of walking, whilst addressing cardiovascular de-conditioning, thereby, potentially reducing effort and fatigue for some people with MS.
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Affiliation(s)
- M A Newman
- Physiotherapy Research Unit, NOC NHS Trust, Oxford OX3 7LD, UK
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Chung LH, Angelo J, van Emmerik REA, Kent JA. Energy cost of walking, symptomatic fatigue and perceived exertion in persons with multiple sclerosis. Gait Posture 2016; 48:215-219. [PMID: 27318306 DOI: 10.1016/j.gaitpost.2016.05.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 03/18/2016] [Accepted: 05/06/2016] [Indexed: 02/02/2023]
Abstract
A higher energy cost of walking (Cw) is sometimes observed in MS, and could contribute to fatigue. The purpose of this study was to compare Cw at three speeds in MS and controls, and determine the effects of walking speed on fatigue and perceived exertion. We hypothesized that MS would have higher Cw, fatigue and exertion during walking than controls. Ten persons with MS and 14 controls of similar age and physical activity levels were studied. Oxygen consumption (VO2) was obtained at rest and during treadmill walking at 0.6 and 1.4ms(-1), and preferred speed. Cw was calculated as net VO2:velocity. Fatigue and exertion were assessed using the visual analog fatigue and modified Borg scales, respectively. Preferred treadmill speed was not different between groups. Cw was higher in MS than controls across walking speeds (p=0.003), with a group-by-speed interaction indicating higher Cw in MS at 0.6ms(-1) (p=0.001), but not at preferred speed or 1.4ms(-1). MS reported greater fatigue (p=0.001) and exertion (p=0.004) at all speeds. Despite similar preferred speeds, and Cw at preferred and fast speeds, MS exhibited higher fatigue and exertion at all walking speeds. These results suggest that increased energy demands in MS are most notable at low speeds such as those used in everyday activities, which may contribute to fatigue over the day.
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Affiliation(s)
- Linda H Chung
- Department of Kinesiology, University of Massachusetts, Amherst, MA, USA
| | - Jillian Angelo
- Department of Kinesiology, University of Massachusetts, Amherst, MA, USA
| | | | - Jane A Kent
- Department of Kinesiology, University of Massachusetts, Amherst, MA, USA.
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Heine M, van den Akker LE, Blikman L, Hoekstra T, van Munster E, Verschuren O, Visser-Meily A, Kwakkel G. Real-Time Assessment of Fatigue in Patients With Multiple Sclerosis: How Does It Relate to Commonly Used Self-Report Fatigue Questionnaires? Arch Phys Med Rehabil 2016; 97:1887-1894.e1. [PMID: 27233157 DOI: 10.1016/j.apmr.2016.04.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 04/26/2016] [Accepted: 04/29/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVES (1) To assess real-time patterns of fatigue; (2) to assess the association between a real-time fatigue score and 3 commonly used questionnaires (Checklist Individual Strength [CIS] fatigue subscale, Modified Fatigue Impact Scale (MFIS), and Fatigue Severity Scale [FSS]); and (3) to establish factors that confound the association between the real-time fatigue score and the conventional fatigue questionnaires in patients with multiple sclerosis (MS). DESIGN Cross-sectional study. SETTING MS-specialized outpatient facility. PARTICIPANTS Ambulant patients with MS (N=165) experiencing severe self-reported fatigue. INTERVENTIONS Not applicable. MAIN OUTCOME MEASURES A real-time fatigue score was assessed by sending participants 4 text messages on a particular day (How fatigued do you feel at this moment?; score range, 0-10). Latent class growth mixed modeling was used to determine diurnal patterns of fatigue. Regression analyses were used to assess the association between the mean real-time fatigue score and the CIS fatigue subscale, MFIS, and FSS. Significant associations were tested for candidate confounders (eg, disease severity, work status, sleepiness). RESULTS Four significantly different fatigue profiles were identified by the real-time fatigue score, namely a stable high (n=79), increasing (n=57), stable low (n=16), and decreasing (n=13). The conventional questionnaires correlated poorly (r<.300) with the real-time fatigue score. The Epworth Sleepiness Scale significantly reduced the regression coefficient between the real-time fatigue score and conventional questionnaires, ranging from 15.4% to 35%. CONCLUSIONS Perceived fatigue showed 4 different diurnal patterns in patients with MS. Severity of sleepiness is an important confounder to take into account in the assessment of fatigue.
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Affiliation(s)
- Martin Heine
- Department of Rehabilitation Medicine, MOVE Research Institute, VU University Medical Center, Amsterdam, The Netherlands; Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and Rehabilitation Center De Hoogstraat, Utrecht, The Netherlands.
| | - Lizanne Eva van den Akker
- Department of Rehabilitation Medicine, EMGO Research Institute, VU University Medical Center, Amsterdam, The Netherlands
| | - Lyan Blikman
- Department of Rehabilitation Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Trynke Hoekstra
- Department of Health Sciences, VU University, Amsterdam, The Netherlands; Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
| | - Erik van Munster
- Department of Neurology, Jeroen Bosch Ziekenhuis, Den Bosch, The Netherlands
| | - Olaf Verschuren
- Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and Rehabilitation Center De Hoogstraat, Utrecht, The Netherlands
| | - Anne Visser-Meily
- Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and Rehabilitation Center De Hoogstraat, Utrecht, The Netherlands
| | - Gert Kwakkel
- Department of Rehabilitation Medicine, MOVE Research Institute, VU University Medical Center, Amsterdam, The Netherlands; Department of Neurorehabilitation, Reade Center of Rehabilitation and Rheumatology, Amsterdam, The Netherlands; Department of Physical Therapy and Human Movement Sciences, Northwestern University, Evanston, IL
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Garg H, Bush S, Gappmaier E. Associations Between Fatigue and Disability, Functional Mobility, Depression, and Quality of Life in People with Multiple Sclerosis. Int J MS Care 2016; 18:71-7. [PMID: 27134580 DOI: 10.7224/1537-2073.2015-013] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Fatigue is a common symptom in people with multiple sclerosis (MS), but its associations with disability, functional mobility, depression, and quality of life (QOL) remain unclear. We aimed to determine the associations between different levels of fatigue and disability, functional mobility, depression, and physical and mental QOL in people with MS. METHODS Eighty-nine individuals with MS (mean [SD] disease duration = 13.6 [9.8] years, mean [SD] Expanded Disability Status Scale [EDSS] score = 5.3 [1.5]) and no concurrent relapses were retrospectively analyzed. Participants were divided into two groups based on five-item Modified Fatigue Impact Scale (MFIS-5) scores: group LF (n = 32, MFIS-5 score ≤10 [low levels of fatigue]) and group HF (n = 57, MFIS-5 score >10 [high levels of fatigue]). RESULTS Sixty-four percent of the sample reported high levels of fatigue. Compared with group LF, group HF demonstrated significantly (P < .05) greater impairments in the Timed Up and Go test, Activities-specific Balance Confidence scale, and 12-item Multiple Sclerosis Walking Scale scores; depression; and QOL but not in the EDSS scores, which were not significantly different between groups. CONCLUSIONS Fatigue was found to be a predominant symptom in the study participants. Individuals reporting higher levels of fatigue concomitantly exhibited greater impairments in functional mobility, depression, and physical and mental QOL. Disability was not found to be related to level of fatigue. These findings can be important for appropriate assessment and management of individuals with MS with fatigue.
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Affiliation(s)
- Hina Garg
- Department of Physical Therapy (HG, EG) and the Department of Exercise and Sport Science (SB), University of Utah, Salt Lake City, UT, USA
| | - Steffani Bush
- Department of Physical Therapy (HG, EG) and the Department of Exercise and Sport Science (SB), University of Utah, Salt Lake City, UT, USA
| | - Eduard Gappmaier
- Department of Physical Therapy (HG, EG) and the Department of Exercise and Sport Science (SB), University of Utah, Salt Lake City, UT, USA
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Yang K, Xiong WX, Liu FT, Sun YM, Luo S, Ding ZT, Wu JJ, Wang J. Objective and quantitative assessment of motor function in Parkinson's disease-from the perspective of practical applications. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:90. [PMID: 27047949 DOI: 10.21037/atm.2016.03.09] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Parkinson's disease (PD) is a common neurodegenerative disorder with high morbidity because of the coming aged society. Currently, disease management and the development of new treatment strategies mainly depend on the clinical information derived from rating scales and patients' diaries, which have various limitations with regard to validity, inter-rater variability and continuous monitoring. Recently the prevalence of mobile medical equipment has made it possible to develop an objective, accurate, remote monitoring system for motor function assessment, playing an important role in disease diagnosis, home-monitoring, and severity evaluation. This review discusses the recent development in sensor technology, which may be a promising replacement of the current rating scales in the assessment of motor function of PD.
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Affiliation(s)
- Ke Yang
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Wei-Xi Xiong
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Feng-Tao Liu
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yi-Min Sun
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Susan Luo
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Zheng-Tong Ding
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Jian-Jun Wu
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Jian Wang
- Department & Institute of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
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The correlation between symptomatic fatigue to definite measures of gait in people with multiple sclerosis. Gait Posture 2016; 44:178-83. [PMID: 27004654 DOI: 10.1016/j.gaitpost.2015.12.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 05/21/2015] [Accepted: 12/10/2015] [Indexed: 02/02/2023]
Abstract
There is a general consensus relating to the multidimensional aspects of fatigue in people with multiple sclerosis (PwMS), however, the exact impact of this symptom on gait is not fully understood. Our primary aim was to examine the relationship between definite parameters of gait with self-reported symptomatic fatigue in PwMS according to their level of neurological impairment. Spatio-temporal parameters of gait were studied using an electronic walkway. The Multiple Sclerosis Walking Scale (MSWS-12) questionnaire, a patient-rated measure of walking ability was collected. The Modified Fatigue Impact Scale (MFIS) questionnaire was used to determine the level of symptomatic fatigue. One hundred and one PwMS (61 women) were included in the study analysis. Subjects were divided into mild and moderate neurological impaired groups. Fatigue was correlated with 5 (out of 14) spatiotemporal parameters. However, correlation scores were all <0.35, thus considered as weak correlations. In the mild group, the double support period was the only variable positively correlated to fatigue (Spearman's rho=0.28, P=0.05). In the moderate group, step and stride length were solely negatively correlated to fatigue (Spearman's rho=0.32, P=0.03). In contrast to the definite gait parameters, the MSWS-12 self-questionnaire was moderately positively correlated to the level of fatigue. Scores for the total, mild and moderate groups were 0.54, 0.57 and 0.51; P<0.01, respectively. The present results indicate that modifications in spatio-temporal parameters of gait are not closely related to symptomatic fatigue in PwMS. On the contrary, the self-reported MSWS-12 questionnaire is predisposed to level of fatigue in PwMS.
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Chalah MA, Riachi N, Ahdab R, Créange A, Lefaucheur JP, Ayache SS. Fatigue in Multiple Sclerosis: Neural Correlates and the Role of Non-Invasive Brain Stimulation. Front Cell Neurosci 2015; 9:460. [PMID: 26648845 PMCID: PMC4663273 DOI: 10.3389/fncel.2015.00460] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Accepted: 11/11/2015] [Indexed: 12/21/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic progressive inflammatory disease of the central nervous system (CNS) and the major cause of non-traumatic disability in young adults. Fatigue is a frequent symptom reported by the majority of MS patients during their disease course and drastically affects their quality of life. Despite its significant prevalence and impact, the underlying pathophysiological mechanisms are not well elucidated. MS fatigue is still considered the result of multifactorial and complex constellations, and is commonly classified into “primary” fatigue related to the pathological changes of the disease itself, and “secondary” fatigue attributed to mimicking symptoms, comorbid sleep and mood disorders, and medications side effects. Radiological, physiological, and endocrine data have raised hypotheses regarding the origin of this symptom, some of which have succeeded in identifying an association between MS fatigue and structural or functional abnormalities within various brain networks. Hence, the aim of this work is to reappraise the neural correlates of MS fatigue and to discuss the rationale for the emergent use of noninvasive brain stimulation (NIBS) techniques as potential treatments. This will include a presentation of the various NIBS modalities and a suggestion of their potential mechanisms of action in this context. Specific issues related to the value of transcranial direct current stimulation (tDCS) will be addressed.
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Affiliation(s)
- Moussa A Chalah
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil Créteil, France ; Service de Physiologie - Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique - Hôpitaux de Paris Créteil, France
| | - Naji Riachi
- Neurology Division, University Medical Center Rizk Hospital Beirut, Lebanon
| | - Rechdi Ahdab
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil Créteil, France ; Neurology Division, University Medical Center Rizk Hospital Beirut, Lebanon
| | - Alain Créange
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil Créteil, France ; Service de Neurologie, Hôpital Henri Mondor, Assistance Publique - Hôpitaux de Paris Créteil, France
| | - Jean-Pascal Lefaucheur
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil Créteil, France ; Service de Physiologie - Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique - Hôpitaux de Paris Créteil, France
| | - Samar S Ayache
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil Créteil, France ; Service de Physiologie - Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique - Hôpitaux de Paris Créteil, France
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Martin F, Inoue E, Cortese ICM, de Almeida Kruschewsky R, Adonis A, Grassi MFR, Galvão-Castro B, Jacobson S, Yamano Y, Taylor GP, Bland M. Timed walk as primary outcome measure of treatment response in clinical trials for HTLV-1-associated myelopathy: a feasibility study. Pilot Feasibility Stud 2015; 1:35. [PMID: 27965813 PMCID: PMC5153909 DOI: 10.1186/s40814-015-0031-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 10/07/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To advance the treatment of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP), randomised controlled therapeutic studies with appropriate and sensitive outcomes are reuired. One candidate outcome is the 10-metre walk test (10MWT), a patient-centred, simple and functional measure. To calculate sample size based on 10MWT as the primary outcome, variability within and between subjects must be known. METHODS Data on 10MWT from 76 patients with HAM/TSP were prospectively collected from four specialist centres in Brazil, Japan, USA and UK. Data, collected at two time points, 6 months apart, were log transformed and subjected to analysis of covariance. RESULTS Baseline mean (standard deviation = SD), median 10MWT were 23.5 (18.9), 16.3 s/10 m and at 6 months 24.9 (23.9), 16.4 s/10 m. The mean (SD) % increase in walk time was 5.74 % (28.2 %). After logarithmic transformation, the linear correlation between baseline and 24 weeks 10MWT was r = 0.938. Using these data, it was determined that a randomised controlled trial with 30 participants per group would have 90 % power to detect a 19 % decrease or a 23 % increase in 10MWT. CONCLUSIONS The intra-patient variability of 10MWT is relatively small in HAM/TSP over 6 months. 10MWT is a feasible outcome measure for a clinical trial in HAM/TSP. To our knowledge, this is the first ever recommendation for the sample size required for trials in HAM/TSP patients.
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Affiliation(s)
- Fabiola Martin
- Department of Biology, Centre for Immunology and Infection, Hull York Medical School, University of York, York, UK
| | - Eisuke Inoue
- National Centre for Child Health and Development, National Medical Centre for Children and Mothers, Research Institute, Tokyo, Japan
| | - Irene C M Cortese
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, USA
| | - Ramon de Almeida Kruschewsky
- Advanced Laboratory of Public Health, Gonçalo Moniz Center, Fundação Oswaldo Cruz, Salvador, Bahia Brazil ; Bahian School of Medicine and Public Health (EBMSP), Salvador, Bahia Brazil
| | - Adine Adonis
- Department of Medicine, Section of Virology, Imperial College London, London, UK
| | - Maria Fernanda Rios Grassi
- Advanced Laboratory of Public Health, Gonçalo Moniz Center, Fundação Oswaldo Cruz, Salvador, Bahia Brazil ; Bahian School of Medicine and Public Health (EBMSP), Salvador, Bahia Brazil
| | - Bernardo Galvão-Castro
- Advanced Laboratory of Public Health, Gonçalo Moniz Center, Fundação Oswaldo Cruz, Salvador, Bahia Brazil ; Bahian School of Medicine and Public Health (EBMSP), Salvador, Bahia Brazil
| | - Steven Jacobson
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, USA
| | - Yoshihisa Yamano
- Department of Rare Diseases Research, Institute of Medical Science, St. Marianna University Graduate School of Medicine, Kawasaki, Japan
| | - Graham P Taylor
- Department of Medicine, Section of Virology, Imperial College London, London, UK
| | - Martin Bland
- Department of Health Sciences, University of York, York, UK
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