1
|
Ozkul C, Eldemir K, Yildirim MS, Cobanoglu G, Eldemir S, Guzel NA, Irkec C, Guclu-Gunduz A. Relationship between sensation and balance and gait in multiple sclerosis patients with mild disability. Mult Scler Relat Disord 2024; 87:105690. [PMID: 38795594 DOI: 10.1016/j.msard.2024.105690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/31/2024] [Accepted: 05/17/2024] [Indexed: 05/28/2024]
Abstract
BACKGROUND Patients with Multiple Sclerosis (PwMS) often experience sensory, balance, and gait problems. Impairment in any sensation may increase imbalance and gait disorder in PwMS. This study aimed to (1) compare foot plantar sensations, knee position sense, balance, and gait in PwMS compared to Healthy Individuals (HI) and (2) examine the relationship between plantar sensations, knee position sense, balance, and gait in PwMS. METHODS Thirty PwMS with mild disability and 10 HI participated in this study. Light touch threshold, two-point discrimination, vibration duration, and knee position sense were examined on the Dominant Side (DS) and Non-Dominant Side (NDS). Balance and spatio-temporal gait analysis were evaluated in all participants. RESULTS PwMS had higher postural sway with eyes closed on the foam surface, longer swing phase of DS, longer single support phase of NDS, and shorter double support phase of DS compared to HI (p < 0.05). The results of regression analysis showed that the light touch thresholds of the 1st and 5th toes of the DS were associated with postural sway in different sensory conditions (p < 0.05). In contrast, the light touch thresholds of the 1st and 5th toes, two-point discrimination of the heel, vibration duration of the 1st metatarsal head and knee position sense of the NDS, and light touch threshold in the medial arch of both sides were associated with the gait parameters (p < 0.05). CONCLUSION PwMS, even with mild disabilities needs neurorehabilitation to improve plantar sensation and knee position sense.
Collapse
Affiliation(s)
- Cagla Ozkul
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Türkiye.
| | - Kader Eldemir
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Ordu University, Ordu, Türkiye
| | - Muhammed Seref Yildirim
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Trakya University, Edirne, Türkiye
| | - Gamze Cobanoglu
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Türkiye
| | - Sefa Eldemir
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Sivas Cumhuriyet University, Sivas, Türkiye
| | - Nevin Atalay Guzel
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Türkiye
| | - Ceyla Irkec
- Department of Neurology, Lokman Hekim University, Ankara, Türkiye
| | - Arzu Guclu-Gunduz
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Türkiye
| |
Collapse
|
2
|
Cofré Lizama LE, Panisset MG, Peng L, Tan Y, Kalincik T, Galea MP. Postural behaviour in people with multiple sclerosis: A complexity paradox. Gait Posture 2024; 111:14-21. [PMID: 38608470 DOI: 10.1016/j.gaitpost.2024.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/31/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024]
Abstract
BACKGROUND Balance deficits are a major concern for people with multiple sclerosis (pwMS). Measuring complexity of motor behaviour can offer an insight into MS-related changes in adaptability of the balance control system when dealing with increasingly complex tasks. QUESTION Does postural behaviour complexity differ between pwMS at early stages of the disease and healthy controls (HC)? Does postural behaviour complexity change across increasingly complex tasks? METHODS Forty-eight pwMS and 24 HC performed four increasingly complex postural tasks with eyes open (EO), eyes closed (EC), on firm (FS) and compliant surface (CS). Lumbar and sternum sensors recorded 3D acceleration, from which complexity index (CI) was calculated using multiscale sample entropy (MSE) in the frontal and sagittal planes. RESULTS We found that only the complexity index in both planes during the eyes closed on compliant surface (EC-CS) task was significantly lower in pwMS compared to HC. We also found that complexity in pwMS was significantly lower during EC-CS compared to the other three tasks when using both lumbar and sternum sensors. SIGNIFICANCE Increasing the complexity of postural tasks reduces the complexity of postural behaviour in pwMS. This paradox may reflect reduced adaptability of the sensorimotor integration processes at early stages of MS. CI can provide a different perspective on balance deficits and could potentially be a more sensitive biomarker of MS progression and an early indicator of balance deficit.
Collapse
Affiliation(s)
| | - Maya G Panisset
- Department of Medicine, The University of Melbourne, Parkville, VIC 3050, Australia
| | - Liuhua Peng
- School of Mathematics and Statistics, The University of Melbourne, Parkville, VIC 3050, Australia
| | - Ying Tan
- Department of Mechanical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Tomas Kalincik
- Clinical Outcomes Research Unit, The University of Melbourne, Melbourne, VIC 3052, Australia; Neuroimmunology Centre, Department of Neurology, Royal Melbourne Hospital, VIC 3052, Australia
| | - Mary P Galea
- Department of Medicine, The University of Melbourne, Parkville, VIC 3050, Australia; Australian Rehabilitation Research Centre, Royal Park Campus, Parkville, VIC 3052, Australia
| |
Collapse
|
3
|
Vonesch A, Duhot C, Lelard T, Léonard G, Błażkiewicz M, Mouras H. Non-Linear Measures of Postural Control in Response to Painful and Non-Painful Visual Stimuli. ENTROPY (BASEL, SWITZERLAND) 2023; 25:1561. [PMID: 37998253 PMCID: PMC10670807 DOI: 10.3390/e25111561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
Over the past decade, researchers have focused on studying the functional context of perceiving painful stimuli, particularly concerning the posturographic correlates of emotional processing. The aim of this study was to investigate the differential modulation of non-linear measures characterizing postural control in the context of perceiving painful stimuli. The study involved 36 healthy young participants who, while standing, viewed images depicting feet and hands in painful or non-painful situations, both actively (by imagining themselves affected by the situation) and passively. For Center of Pressure (COP) displacement, three non-linear measures (Sample Entropy, Fractal Dimension, and Lyapunov exponent) were calculated. The results suggest lower values of FD and LyE in response to active stimulation compared to those recorded for passive stimulation. Above all, our results pledge for the usefulness of the Lyapunov exponent for assessing postural modulation dynamics in response to painful stimuli perception. The feasibility of this calculation could provide an interesting insight in the collection of biomarkers related to postural correlates of emotional processes and their modulation in neurological disease where socio-affective functions can be often impaired before cognitive ones.
Collapse
Affiliation(s)
- Alexandre Vonesch
- UR-UPJV 4559 LNFP Laboratoire de Neurosciences Fonctionnelles et Pathologies, Université de Picardie Jules Verne, 80054 Amiens, France
| | - Cassandre Duhot
- UR-UPJV 4559 LNFP Laboratoire de Neurosciences Fonctionnelles et Pathologies, Université de Picardie Jules Verne, 80054 Amiens, France
| | - Thierry Lelard
- UR UPJV 3300 APERE Adaptation Physiologiques à l’Exercice et Réadaptation à l’Effort, Université de Picardie Jules Verne, 80054 Amiens, France;
| | - Guillaume Léonard
- Research Centre on Aging, CIUSSS de l’Estrie—CHUS, Sherbrooke, QC J1H 4C4, Canada;
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Michalina Błażkiewicz
- Faculty of Rehabilitation, The Józef Piłsudski University of Physical Education in Warsaw, 00-809 Warsaw, Poland;
| | - Harold Mouras
- UR-UPJV 4559 LNFP Laboratoire de Neurosciences Fonctionnelles et Pathologies, Université de Picardie Jules Verne, 80054 Amiens, France
| |
Collapse
|
4
|
Castor CGM, Santos TRT, Souza TR, Araújo PA, Okai-Nóbrega LA, Ocarino JM, Silva A, Fonseca ST. Effect of sleep deprivation on postural control and dynamic stability in healthy young adults. Neurosci Lett 2023; 797:137055. [PMID: 36610588 DOI: 10.1016/j.neulet.2023.137055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023]
Abstract
BACKGROUND Postural control results from non-linear interactions of multiple neuromusculoskeletal elements and contextual factors. The use of non-linear analyses that consider the temporal evolution of postural adjustments, such as sample entropy, could inform about the changes in postural control due to contextual disturbances such as sleep deprivation. RESEARCH QUESTION What are the effects of sleep deprivation on static postural control and dynamic stability in healthy young adults? METHODS A quasi-experimental study was performed with 17 healthy young males submitted to 24 h of monitored sleep deprivation. The postural control was measured using sample entropy, area, and total average velocity of the center of pressure on a force platform. The dynamic stability was measured using the Modified Star Excursion Balance Test (SEBTm) composite score for each lower limb. Repeated-measures analysis of variance (baseline × 12 h × 15 h × 18 h × 21 h × 24 h of sleep deprivation) verified the effect of sleep deprivation in the postural control variables. Paired t-test compared the composite score of the SEBTm between baseline and 24 h sleep deprivation. RESULTS Sample entropy decreased after 18 h of sleep deprivation (p = 0.032) and 24 h of sleep deprivation (p = 0.001). Despite the significant main effect for the area (p = 0.012) and speed (p = 0.007) of the center of pressure, no pairwise differences were identified in the post hoc analysis. The non-dominant lower limb SEBTm composite score was reduced after 24 h of sleep deprivation (p = 0.033), and no difference was observed in the dominant limb. SIGNIFICANCE Sleep deprivation reduced the adaptability in static postural control and dynamic stability of the non-dominant lower limb of healthy young male adults. Sample entropy seemed more sensitive to capture the effects of sleep deprivation than the classical postural control variables.
Collapse
Affiliation(s)
- Camila G M Castor
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thiago R T Santos
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Faculty of Physical Education and Physical Therapy, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - Thales R Souza
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Priscila A Araújo
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Liria A Okai-Nóbrega
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Juliana M Ocarino
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Andressa Silva
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio T Fonseca
- Graduate Program in Rehabilitation Sciences, Physical Therapy Department, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Centro de Treinamento Esportivo, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
| |
Collapse
|
5
|
Liddy J, Busa M. Considerations for Applying Entropy Methods to Temporally Correlated Stochastic Datasets. ENTROPY (BASEL, SWITZERLAND) 2023; 25:306. [PMID: 36832672 PMCID: PMC9955719 DOI: 10.3390/e25020306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/18/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
The goal of this paper is to highlight considerations and provide recommendations for analytical issues that arise when applying entropy methods, specifically Sample Entropy (SampEn), to temporally correlated stochastic datasets, which are representative of a broad range of biomechanical and physiological variables. To simulate a variety of processes encountered in biomechanical applications, autoregressive fractionally integrated moving averaged (ARFIMA) models were used to produce temporally correlated data spanning the fractional Gaussian noise/fractional Brownian motion model. We then applied ARFIMA modeling and SampEn to the datasets to quantify the temporal correlations and regularity of the simulated datasets. We demonstrate the use of ARFIMA modeling for estimating temporal correlation properties and classifying stochastic datasets as stationary or nonstationary. We then leverage ARFIMA modeling to improve the effectiveness of data cleaning procedures and mitigate the influence of outliers on SampEn estimates. We also emphasize the limitations of SampEn to distinguish among stochastic datasets and suggest the use of complementary measures to better characterize the dynamics of biomechanical variables. Finally, we demonstrate that parameter normalization is not an effective procedure for increasing the interoperability of SampEn estimates, at least not for entirely stochastic datasets.
Collapse
Affiliation(s)
- Joshua Liddy
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Michael Busa
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA 01003, USA
- Institute for Applied Life Sciences, University of Massachusetts Amherst, Amherst, MA 01003, USA
| |
Collapse
|
6
|
Sensorimotor recalibration of postural control strategies occurs after whole body vibration. Sci Rep 2023; 13:522. [PMID: 36627328 PMCID: PMC9831994 DOI: 10.1038/s41598-022-27117-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 12/26/2022] [Indexed: 01/11/2023] Open
Abstract
Efficient postural control results from an effective interplay between sensory feedbacks integration and muscle modulation and can be affected by ageing and neuromuscular injuries. With this study, we investigated the effect of whole-body vibratory stimulation on postural control strategies employed to maintain an upright posture. We explored both physiological and posturography metrics, through corticomuscular and intramuscular coherence, and muscle networks analyses. The stimulation disrupts balance in the short term, but leads to a greater contribution of cortical activity, necessary to modulate muscle activation via the formation of (new) synergies. We also observed a reconfiguration of muscle recruitment patterns that returned to pre-stimulation levels after few minutes, accompanied by a slight improvement of balance in the anterior-posterior direction. Our results suggest that, in the context of postural control, appropriate mechanical stimulation is capable of triggering a recalibration of the sensorimotor set and might offer new perspectives for motor re-education.
Collapse
|
7
|
Carpinella I, Anastasi D, Gervasoni E, Di Giovanni R, Tacchino A, Brichetto G, Confalonieri P, Rovaris M, Solaro C, Ferrarin M, Cattaneo D. Balance Impairments in People with Early-Stage Multiple Sclerosis: Boosting the Integration of Instrumented Assessment in Clinical Practice. SENSORS (BASEL, SWITZERLAND) 2022; 22:9558. [PMID: 36502265 PMCID: PMC9736931 DOI: 10.3390/s22239558] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/15/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
The balance of people with multiple sclerosis (PwMS) is commonly assessed during neurological examinations through clinical Romberg and tandem gait tests that are often not sensitive enough to unravel subtle deficits in early-stage PwMS. Inertial sensors (IMUs) could overcome this drawback. Nevertheless, IMUs are not yet fully integrated into clinical practice due to issues including the difficulty to understand/interpret the big number of parameters provided and the lack of cut-off values to identify possible abnormalities. In an attempt to overcome these limitations, an instrumented modified Romberg test (ImRomberg: standing on foam with eyes closed while wearing an IMU on the trunk) was administered to 81 early-stage PwMS and 38 healthy subjects (HS). To facilitate clinical interpretation, 21 IMU-based parameters were computed and reduced through principal component analysis into two components, sway complexity and sway intensity, descriptive of independent aspects of balance, presenting a clear clinical meaning and significant correlations with at least one clinical scale. Compared to HS, early-stage PwMS showed a 228% reduction in sway complexity and a 63% increase in sway intensity, indicating, respectively, a less automatic (more conscious) balance control and larger and faster trunk movements during upright posture. Cut-off values were derived to identify the presence of balance abnormalities and if these abnormalities are clinically meaningful. By applying these thresholds and integrating the ImRomberg test with the clinical tandem gait test, balance impairments were identified in 58% of PwMS versus the 17% detected by traditional Romberg and tandem gait tests. The higher sensitivity of the proposed approach would allow for the direct identification of early-stage PwMS who could benefit from preventive rehabilitation interventions aimed at slowing MS-related functional decline during neurological examinations and with minimal modifications to the tests commonly performed.
Collapse
Affiliation(s)
| | - Denise Anastasi
- IRCCS Fondazione Don Carlo Gnocchi Onlus, 20148 Milan, Italy
| | - Elisa Gervasoni
- IRCCS Fondazione Don Carlo Gnocchi Onlus, 20148 Milan, Italy
| | - Rachele Di Giovanni
- Department of Rehabilitation, Centro di Recupero e Rieducazione Funzionale (CRRF) “Mons. Luigi Novarese”, 13040 Moncrivello, Italy
| | - Andrea Tacchino
- Italian Multiple Sclerosis Foundation, Scientific Research Area, 16126 Genoa, Italy
| | - Giampaolo Brichetto
- Italian Multiple Sclerosis Foundation, Scientific Research Area, 16126 Genoa, Italy
| | - Paolo Confalonieri
- IRCCS Foundation “Carlo Besta” Neurological Institute, 20133 Milan, Italy
| | - Marco Rovaris
- IRCCS Fondazione Don Carlo Gnocchi Onlus, 20148 Milan, Italy
| | - Claudio Solaro
- Department of Rehabilitation, Centro di Recupero e Rieducazione Funzionale (CRRF) “Mons. Luigi Novarese”, 13040 Moncrivello, Italy
| | | | - Davide Cattaneo
- IRCCS Fondazione Don Carlo Gnocchi Onlus, 20148 Milan, Italy
- Department of Physiopathology and Transplants, University of Milan, 20122 Milan, Italy
| |
Collapse
|
8
|
Reduced System Complexity of Heart Rate Dynamics in Patients with Hyperthyroidism: A Multiscale Entropy Analysis. ENTROPY 2022; 24:e24020258. [PMID: 35205552 PMCID: PMC8871399 DOI: 10.3390/e24020258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 02/04/2023]
Abstract
Studying heart rate dynamics would help understand the effects caused by a hyperkinetic heart in patients with hyperthyroidism. By using a multiscale entropy (MSE) analysis of heart rate dynamics derived from one-channel electrocardiogram recording, we aimed to compare the system complexity of heart rate dynamics between hyperthyroid patients and control subjects. A decreased MSE complexity index (CI) computed from MSE analysis reflects reduced system complexity. Compared with the control subjects (n = 37), the hyperthyroid patients (n = 37) revealed a significant decrease (p < 0.001) in MSE CI (hyperthyroid patients 10.21 ± 0.37 versus control subjects 14.08 ± 0.21), sample entropy for each scale factor (from 1 to 9), and high frequency power (HF) as well as a significant increase (p < 0.001) in low frequency power (LF) in normalized units (LF%) and ratio of LF to HF (LF/HF). In conclusion, besides cardiac autonomic dysfunction, the system complexity of heart rate dynamics is reduced in hyperthyroidism. This finding implies that the adaptability of the heart rate regulating system is impaired in hyperthyroid patients. Additionally, it might explain the exercise intolerance experienced by hyperthyroid patients. In addition, hyperthyroid patients and control subjects could be distinguished by the MSE CI computed from MSE analysis of heart rate dynamics.
Collapse
|
9
|
Zanin M, Olivares F, Pulido-Valdeolivas I, Rausell E, Gomez-Andres D. Gait analysis under the lens of statistical physics. Comput Struct Biotechnol J 2022; 20:3257-3267. [PMID: 35782747 PMCID: PMC9237948 DOI: 10.1016/j.csbj.2022.06.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/10/2022] [Accepted: 06/10/2022] [Indexed: 11/29/2022] Open
Abstract
Human gait is a fundamental activity, essential for the survival of the individual, and an emergent property of the interactions between complex physical and cognitive processes. Gait is altered in many situations, due both to external constraints, as e.g. paced walk, and to physical and neurological pathologies. Its study is therefore important as a way of improving the quality of life of patients, but also as a door to understanding the inner working of the human nervous system. In this review we explore how four statistical physics concepts have been used to characterise normal and pathological gait: entropy, maximum Lyapunov exponent, multi-fractal analysis and irreversibility. Beyond some basic definitions, we present the main results that have been obtained in this field, as well as a discussion of the main limitations researchers have dealt and will have to deal with. We finally conclude with some biomedical considerations and avenues for further development.
Collapse
Affiliation(s)
- Massimiliano Zanin
- Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (CSIC-UIB), Campus UIB, Palma de Mallorca 07122, Spain
| | - Felipe Olivares
- Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (CSIC-UIB), Campus UIB, Palma de Mallorca 07122, Spain
| | - Irene Pulido-Valdeolivas
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Universidad Autónoma de Madrid, Calle del Arzobispo Morcillo 2, Madrid 28029, Spain
| | - Estrella Rausell
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Universidad Autónoma de Madrid, Calle del Arzobispo Morcillo 2, Madrid 28029, Spain
| | - David Gomez-Andres
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Universidad Autónoma de Madrid, Calle del Arzobispo Morcillo 2, Madrid 28029, Spain
- Pediatric Neurology, Vall d'Hebron Institut de Recerca (VHIR), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, ERN-RND & EURO-NMD, Pg. de la Vall d'Hebron 119-129, Barcelona 08035, Spain
| |
Collapse
|
10
|
Abstract
Parkinson’s disease (PD) is a type of neurodegenerative diseases. PD influences gait in many aspects: reduced gait speed and step length, increased axial rigidity, and impaired rhythmicity. Gait-related data used in this study are from PhysioNet. Twenty-one PD patients and five healthy controls (CO) were sorted into four groups: PD without task (PDw), PD with dual task (PDd), control without task (COw), and control with dual task (COd). Since dual task actions are attention demanding, either gait or cognitive function may be affected. To quantify the used walking data, eight pressure sensors installed in each insole are used to measure the vertical ground reaction force. Thus, quantitative measurement analysis is performed utilizing multiscale entropy (MSE) and complexity index (CI) to analyze and differentiate between the ground reaction force of the four different groups. Results show that the CI of patients with PD is higher than that of CO and 11 of the sensor signals are statistically significant (p < 0.05). The COd group has larger CI values at the beginning (p = 0.021) but they get lower at the end of the test (p = 0.000) compared to that in the COw group. The end-of-test CI for the PDw group is lower in one of the feet sensor signals, and in the right total ground reaction force compared to the PDd group counterparts. In conclusion, when people start to adjust their gait due to pathology or stress, CI may increase first and reach a peak, but it decreases afterward when stress or pathology is further increased.
Collapse
|
11
|
Abstract
Various walking speeds may induce different responses on the plantar pressure patterns. Current methods used to analyze plantar pressure patterns are linear and ignore nonlinear features. The purpose of this study was to analyze the complexity of plantar pressure images after walking at various speeds using nonlinear bidimensional multiscale entropy (MSE2D). Twelve participants (age: 27.1 ± 5.8 years; height: 170.3 ± 10.0 cm; and weight: 63.5 ± 13.5 kg) were recruited for walking at three speeds (slow at 1.8 mph, moderate at 3.6 mph, and fast at 5.4 mph) for 20 minutes. A plantar pressure measurement system was used to measure plantar pressure patterns. Complexity index (CI), a summation of MSE2D from all time scales, was used to quantify the changes of complexity of plantar pressure images. The analysis of variance with repeated measures and Fisher’s least significant difference correction were used to examine the results of this study. The results showed that CI of plantar pressure images of 1.8 mph (1.780) was significantly lower compared with 3.6 (1.790) and 5.4 mph (1.792). The results also showed that CI significantly increased from the 1st min (1.780) to the 10th min (1.791) and 20th min (1.791) with slow walking (1.8 mph). Our results indicate that slow walking at 1.8 mph may not be good for postural control compared with moderate walking (3.6 mph) and fast walking (5.4 mph). This study demonstrates that bidimensional multiscale entropy is able to quantify complexity changes of plantar pressure images after different walking speeds.
Collapse
|
12
|
Li Y, Liu T, Venuti CE. Development of postural stability in children with autism spectrum disorder: a cross-sectional study. Int Biomech 2021; 8:54-62. [PMID: 34414860 PMCID: PMC8381937 DOI: 10.1080/23335432.2021.1968316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The purpose was to investigate the effects of age on postural stability for children with autism spectrum disorder (ASD). Twenty-nine children with mild ASD were assigned into one of the three groups: 6–8 years (U8), 9–11 years (U11) and 12–14 years (U14). Participants stood barefoot with both feet on a force platform and maintained stationary for 15 seconds during eyes-open and eyes-closed conditions. Center of pressure data were collected and variables were calculated, including displacements, total distances, sway areas, and sample entropy. The variables were compared among the three groups using a mixed-model ANOVA. The age group effect was significant for mediolateral center of pressure displacement (p = 0.04) and sway distance (p = 0.02). Post-hoc comparisons revealed that U8 exhibited greater mediolateral displacement and total distance compared to U14, regardless of test conditions. The U14 group exhibited improved mediolateral postural stability compared to U8, whereas no differences were found between U8 and U11 or between U11 and U14. This may suggest that children with ASD could slowly develop postural stability but only demonstrate significant changes over a long period of time. Early intervention programs aimed to improve complexity of postural control could be beneficial.
Collapse
Affiliation(s)
- Yumeng Li
- Department of Health and Human Performance, Texas State University, San Marcos, TX, USA
| | - Ting Liu
- Department of Health and Human Performance, Texas State University, San Marcos, TX, USA
| | - Carrie E Venuti
- Department of Health and Human Performance, Texas State University, San Marcos, TX, USA
| |
Collapse
|
13
|
Paolucci T, Bernetti A, Sbardella S, La Russa C, Murgia M, Salomè A, Villani C, Altieri M, Santilli V, Paoloni M, Agostini F, Mangone M. Straighten your back! Self-correction posture and postural balance in "non rehabilitative instructed" multiple sclerosis patients. NeuroRehabilitation 2020; 46:333-341. [PMID: 32250329 DOI: 10.3233/nre-192987] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUD Patients with MS, regardless of the complexity of the activity or sensory conditions, commonly present a significant postural control deficit compared to healthy subjects. OBJECTIVE To investigate which postural self-correction strategies are adopted by patients with Multiple Sclerosis versus a group of healthy-subjects and how self-correction can influence the control of postural balance. METHODS A case-control prospective observational study was conducted. Person with Multiple Sclerosis and a group of healthy volunteers were enrolled. Patients included were instructed with vocal commands, to reach a self-correction posture, and they were compared to healthy subjects. Clinical assessments including Balance, Stabilometry and Postural evaluation of the spine were performed. RESULTS Sixty patients (30: control-group; 30: treatment-group) were enrolled. In the treatment group, the analysis reported a significant statistical difference between path length and center of pressure speed in self-correction posture with closed-eyes (p = 0,049; 0,047) and an improvement in C7 and L3 levels in self-correction posture (p < 0,01-C7; p < 0,01-L3). There are significant statistical differences about path length between the two groups in all examined conditions (p = 0,0001). At sagittal plane evaluation, results show an increase of all measurements in both posture (C7-neutral posture p = 0,0001; L3-neutral posture p = 0,0001; C7-self-correction posture p = 0,0001; L3-self-correction posture p = 0,0001). CONCLUSION Further study should investigate dynamic situations and different Multiple Sclerosis forms to complete balance analysis and to establish a correct rehabilitative program with self-correction exercise as powerful focus.
Collapse
Affiliation(s)
- Teresa Paolucci
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy
| | - Andrea Bernetti
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Silvia Sbardella
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Chiara La Russa
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Massimiliano Murgia
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Angela Salomè
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Ciro Villani
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Marta Altieri
- Multiple Sclerosis Center, Sapienza University of Rome, Rome, Italy
| | - Valter Santilli
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Marco Paoloni
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Francesco Agostini
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| | - Massimiliano Mangone
- Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Rome, Italy
| |
Collapse
|
14
|
Powell DW, Blackmore SE, Puppa M, Lester D, Murray NG, Reed-Jones RJ, Xia RP. Deep brain stimulation enhances movement complexity during gait in individuals with Parkinson's disease. Neurosci Lett 2020; 728:133588. [PMID: 29751070 DOI: 10.1016/j.neulet.2018.05.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/13/2018] [Accepted: 05/04/2018] [Indexed: 12/11/2022]
Abstract
Deep brain stimulation (DBS) is associated with substantial improvements in motor symptoms of PD. Emerging evidence has suggested that nonlinear measures of complexity may provide greater insight into the efficacy of anti-PD treatments. This study investigated sample entropy and complexity index values in individuals with PD when DBS was OFF compared to ON. Five individuals with PD using DBS performed a four-minute treadmill walking task while 3D kinematics were collected over two periods of 30 s. Participants were tested in the DBS-ON and DBS-OFF conditions. Sample entropy (SE) and complexity index (CI) values were calculated for ankle, knee and hip joint angles. Paired samples t-tests were used to compare mean SE and CI values between the DBS-OFF and DBS-ON conditions, respectively. No differences in SE or CI were observed between the DBS-ON and DBS-OFF conditions at the ankle. At the knee, the DBS-ON was associated with greater SE and CI values than the DBS-OFF condition. At the hip, DBS-ON was associated with greater SE and CI values than the DBS-OFF condition. DBS enhances complexity of movement at the hip and knee joints while complexity at the ankle joint is not significantly altered. Greater complexity of knee and hip joint motion may represent increased adaptability and a greater number of available strategies to complete the gait task.
Collapse
Affiliation(s)
- Douglas W Powell
- Exercise Neuroscience Research Laboratory, School of Health Studies, University of Memphis, Memphis, TN, USA.
| | - Sarah E Blackmore
- Exercise Neuroscience Research Laboratory, School of Health Studies, University of Memphis, Memphis, TN, USA
| | - Melissa Puppa
- Exercise Neuroscience Research Laboratory, School of Health Studies, University of Memphis, Memphis, TN, USA
| | - Deranda Lester
- Exercise Neuroscience Research Laboratory, School of Health Studies, University of Memphis, Memphis, TN, USA
| | - Nicholas G Murray
- School of Community Health Sciences, University of Nevada at Reno, Reno, NV, USA
| | - Rebecca J Reed-Jones
- Kinesiology Laboratory, Department of Kinesiology, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
| | - Rui-Ping Xia
- Department of Physical Therapy, University of Saint Mary, Leavenworth, KS, USA
| |
Collapse
|
15
|
Complexity-Based Measures of Postural Sway during Walking at Different Speeds and Durations Using Multiscale Entropy. ENTROPY 2019. [PMCID: PMC7514472 DOI: 10.3390/e21111128] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
: Participation in various physical activities requires successful postural control in response to the changes in position of our body. It is important to assess postural control for early detection of falls and foot injuries. Walking at various speeds and for various durations is essential in daily physical activities. The purpose of this study was to evaluate the changes in complexity of the center of pressure (COP) during walking at different speeds and for different durations. In this study, a total of 12 participants were recruited for walking at two speeds (slow at 3 km/h and moderate at 6 km/h) for two durations (10 and 20 minutes). An insole-type plantar pressure measurement system was used to measure and calculate COP as participants walked on a treadmill. Multiscale entropy (MSE) was used to quantify the complexity of COP. Our results showed that the complexity of COP significantly decreased (p < 0.05) after 20 min of walking (complexity index, CI = −3.51) compared to 10 min of walking (CI = −3.20) while walking at 3 km/h, but not at 6 km/h. Our results also showed that the complexity index of COP indicated a significant difference (p < 0.05) between walking at speeds of 3 km/h (CI = −3.2) and 6 km/h (CI = −3.6) at the walking duration of 10 minutes, but not at 20 minutes. This study demonstrated an interaction between walking speeds and walking durations on the complexity of COP.
Collapse
|
16
|
Multiscale Entropy of Cardiac and Postural Control Reflects a Flexible Adaptation to a Cognitive Task. ENTROPY 2019. [PMCID: PMC7514245 DOI: 10.3390/e21101024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In humans, physiological systems involved in maintaining stable conditions for health and well-being are complex, encompassing multiple interactions within and between system components. This complexity is mirrored in the temporal structure of the variability of output signals. Entropy has been recognized as a good marker of systems complexity, notably when calculated from heart rate and postural dynamics. A degraded entropy is generally associated with frailty, aging, impairments or diseases. In contrast, high entropy has been associated with the elevated capacity to adjust to an ever-changing environment, but the link is unknown between entropy and the capacity to cope with cognitive tasks in a healthy young to middle-aged population. Here, we addressed classic markers (time and frequency domains) and refined composite multiscale entropy (MSE) markers (after pre-processing) of heart rate and postural sway time series in 34 participants during quiet versus cognitive task conditions. Recordings lasted 10 min for heart rate and 51.2 s for upright standing, providing time series lengths of 500–600 and 2048 samples, respectively. The main finding was that entropy increased during cognitive tasks. This highlights the possible links between our entropy measures and the systems complexity that probably facilitates a control remodeling and a flexible adaptability in our healthy participants. We conclude that entropy is a reliable marker of neurophysiological complexity and adaptability in autonomic and somatic systems.
Collapse
|
17
|
Changed Temporal Structure of Neuromuscular Control, Rather Than Changed Intersegment Coordination, Explains Altered Stabilographic Regularity after a Moderate Perturbation of the Postural Control System. ENTROPY 2019; 21:e21060614. [PMID: 33267328 PMCID: PMC7515107 DOI: 10.3390/e21060614] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/19/2019] [Accepted: 06/19/2019] [Indexed: 11/20/2022]
Abstract
Sample entropy (SaEn) applied on center-of-pressure (COP) data provides a measure for the regularity of human postural control. Two mechanisms could contribute to altered COP regularity: first, an altered temporal structure (temporal regularity) of postural movements (H1); or second, altered coordination between segment movements (coordinative complexity; H2). The current study used rapid, voluntary head-shaking to perturb the postural control system, thus producing changes in COP regularity, to then assess the two hypotheses. Sixteen healthy participants (age 26.5 ± 3.5; seven females), whose postural movements were tracked via 39 reflective markers, performed trials in which they first stood quietly on a force plate for 30 s, then shook their head for 10 s, finally stood quietly for another 90 s. A principal component analysis (PCA) performed on the kinematic data extracted the main postural movement components. Temporal regularity was determined by calculating SaEn on the time series of these movement components. Coordinative complexity was determined by assessing the relative explained variance of the first five components. H1 was supported, but H2 was not. These results suggest that moderate perturbations of the postural control system produce altered temporal structures of the main postural movement components, but do not necessarily change the coordinative structure of intersegment movements.
Collapse
|
18
|
Postural Control Entropy Is Increased When Adopting an External Focus of Attention. Motor Control 2019; 23:230-242. [DOI: 10.1123/mc.2017-0089] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
19
|
Moravejolahkami AR, Paknahad Z, Chitsaz A. Association of dietary patterns with systemic inflammation, quality of life, disease severity, relapse rate, severity of fatigue and anthropometric measurements in MS patients. Nutr Neurosci 2019; 23:920-930. [DOI: 10.1080/1028415x.2019.1580831] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Zamzam Paknahad
- Department of Clinical Nutrition, School of Nutrition & Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ahmad Chitsaz
- Department of Neurology, Isfahan University of Medical Sciences Isfahan, Iran
| |
Collapse
|
20
|
Santinelli FB, Barbieri FA, Pinheiro CF, Amado AC, Sebastião E, van Emmerik REA. Postural Control Complexity and Fatigue in Minimally Affected Individuals with Multiple Sclerosis. J Mot Behav 2019; 51:551-560. [DOI: 10.1080/00222895.2019.1567458] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Felipe B. Santinelli
- Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, Graduate Program in Movement Sciences, São Paulo State University (UNESP)–Campus Bauru, Brazil
| | - Fabio A. Barbieri
- Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, Graduate Program in Movement Sciences, São Paulo State University (UNESP)–Campus Bauru, Brazil
| | - Carina F. Pinheiro
- Department of Health Sciences, Ribeirão Preto Medical School University of São Paulo, São Paulo, Brazil
| | - Avelino C. Amado
- Department of Kinesiology School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA
| | - Emerson Sebastião
- Department of Kinesiology and Physical Education, Northern Illinois University, IL
| | - Richard E. A. van Emmerik
- Department of Kinesiology School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA
| |
Collapse
|
21
|
Shahvarpour A, Gagnon D, Preuss R, Henry SM, Larivière C. Trunk postural balance and low back pain: Reliability and relationship with clinical changes following a lumbar stabilization exercise program. Gait Posture 2018; 61:375-381. [PMID: 29448220 DOI: 10.1016/j.gaitpost.2018.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/05/2018] [Accepted: 02/06/2018] [Indexed: 02/02/2023]
Abstract
Lumbar stabilization programs reduce pain and disability, but the mechanisms of action underlying this treatment are unknown. Trunk postural control during unstable sitting represents a surrogate measure of motor control mechanisms involved to maintain the dynamic stability of the spine. This exploratory study aimed to determine the reliability of trunk postural control measures over an 8-week interval, their sensitivity to low back pain status and treatment and their relationship with clinical outcomes. Trunk postural control measures were determined in patients with low back pain before and after an 8-week lumbar stabilization exercise program. Healthy controls were assessed over the same interval, but without any treatment, to determine the reliability of the measures and act as a control group at baseline. The kinematics of a wobble chair during unstable sitting was summarized using different linear and nonlinear measures quantifying the quantity and quality of movement, respectively. The reliability of the measures was moderate to excellent. The results showed significant reduction in pain and disability following the intervention. While no impairment at baseline scores was found, some linear and nonlinear measures changed over the intervention period among the patient group. However, for nonlinear measures only, significant correlations were detected with the change scores of pain and disability. The change of measures over the intervention period was likely due to learning rather than the intervention as similar alteration was detected in the healthy subjects. The results suggest that only the quality (not the quantity) of movement may have relationship with pain and disability.
Collapse
Affiliation(s)
- Ali Shahvarpour
- School of Rehabilitation, Faculty of Medicine, Université de Montréal, 2900 Boul, Edouard-Montpetit, Montreal, Quebec , H3T 1J4 Canada; Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST), 505 Boul, de Maisonneuve O. Montreal, Quebec, H3A 3C2, Canada; Center for Interdisciplinary Research in Rehabilitation of Greater Montreal (CRIR), Montreal Rehabilitation Institute, Montreal, Quebec, Canada.
| | - Dany Gagnon
- School of Rehabilitation, Faculty of Medicine, Université de Montréal, 2900 Boul, Edouard-Montpetit, Montreal, Quebec , H3T 1J4 Canada; Center for Interdisciplinary Research in Rehabilitation of Greater Montreal (CRIR), Montreal Rehabilitation Institute, Montreal, Quebec, Canada.
| | - Richard Preuss
- School of Physical and Occupational Therapy, McGill University, 3654 prom Sir-William-Osler, Montreal, Quebec, H3G 1Y5, Canada; Center for Interdisciplinary Research in Rehabilitation of Greater Montreal (CRIR), Montreal Rehabilitation Institute, Montreal, Quebec, Canada.
| | - Sharon M Henry
- Department of Rehabilitation and Movement Science, The University of Vermont, 305 Rowell Building, Burlington, VT, United States.
| | - Christian Larivière
- Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST), 505 Boul, de Maisonneuve O. Montreal, Quebec, H3A 3C2, Canada; Center for Interdisciplinary Research in Rehabilitation of Greater Montreal (CRIR), Montreal Rehabilitation Institute, Montreal, Quebec, Canada.
| |
Collapse
|
22
|
Comber L, Sosnoff JJ, Galvin R, Coote S. Postural control deficits in people with Multiple Sclerosis: A systematic review and meta-analysis. Gait Posture 2018; 61:445-452. [PMID: 29486362 DOI: 10.1016/j.gaitpost.2018.02.018] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 02/15/2018] [Accepted: 02/17/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Multiple sclerosis (MS) is a neurological condition that can affect the postural stability of the individual and predispose falls in this population. METHODS A systematic literature search identified case-control studies investigating differences in postural control across a diversity of task conditions, with the exception of gait, between people with MS and healthy controls. Meta-analysis was conducted where a variable was presented by four or more studies. RESULTS Forty-three studies of people with a mean Expanded Disability Status Scale (EDSS) of 1.0 to 6.0 were included. Seven conditions of assessment and 105 individual measurement variables relating to postural control were included. Quiet stance was the only condition (11 studies) possessing sufficient data to contribute to meta-analysis in terms of centre of pressure path length (SMD = 1.04, 95% CI {0.86-1.22}, p < 0.001), medio-lateral velocity (SMD = 1.35, 95% CI {0.77-1.92}, p < 0.001) and 95% confidence ellipse (SMD = 0.83 95% CI {0.59-1.08}, p < 0.001). RESULTS indicate that regardless of task complexity or sensory condition, people with MS display considerable deficits in postural control in comparison to healthy controls. CONCLUSIONS The large number of variables and lack of standardisation of reporting makes data synthesis challenging, however, people with MS display considerable deficits in postural control compared to healthy controls regardless of task condition or complexity.
Collapse
Affiliation(s)
- Laura Comber
- School of Allied Health, Health Research Institute, University of Limerick, Ireland.
| | - Jacob J Sosnoff
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, IL, USA.
| | - Rose Galvin
- School of Allied Health, Health Research Institute, University of Limerick, Ireland.
| | - Susan Coote
- School of Allied Health, Health Research Institute, University of Limerick, Ireland.
| |
Collapse
|
23
|
Human Postural Control: Assessment of Two Alternative Interpretations of Center of Pressure Sample Entropy through a Principal Component Factorization of Whole-Body Kinematics. ENTROPY 2018; 20:e20010030. [PMID: 33265120 PMCID: PMC7512231 DOI: 10.3390/e20010030] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 12/21/2017] [Accepted: 01/01/2018] [Indexed: 11/19/2022]
Abstract
Sample entropy (SaEn), calculated for center of pressure (COP) trajectories, is often distinct for compromised postural control, e.g., in Parkinson, stroke, or concussion patients, but the interpretation of COP-SaEn remains subject to debate. The purpose of this paper is to test the hypotheses that COP-SaEn is related (Hypothesis 1; H1) to the complexity of the postural movement structures, i.e., to the utilization and coordination of the mechanical degrees of freedom; or (Hypothesis 2; H2) to the irregularity of the individual postural movement strategies, i.e., to the neuromuscular control of these movements. Twenty-one healthy volunteers (age 26.4 ± 2.4; 10 females), equipped with 27 reflective markers, stood on a force plate and performed 2-min quiet stances. Principal movement strategies (PMs) were obtained from a principal component analysis (PCA) of the kinematic data. Then SaEn was calculated for the COP and PM time-series. H1 was tested by correlating COP-SaEn to the relative contribution of the PMs to the subject specific overall movement and H2 by correlating COP-SaEn and PM-SaEn. Both hypotheses were supported. This suggests that in a healthy population the COP-SaEn is linked to the complexity of the coordinative structure of postural movements, as well as to the irregularity of the neuromuscular control of specific movement components.
Collapse
|
24
|
Lubetzky AV, McCoy SW, Price R, Kartin D. Response to Tendon Vibration Questions the Underlying Rationale of Proprioceptive Training. J Athl Train 2017; 52:97-107. [PMID: 28125270 DOI: 10.4085/1062-6050-52.1.06] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
CONTEXT Proprioceptive training on compliant surfaces is used to rehabilitate and prevent ankle sprains. The ability to improve proprioceptive function via such training has been questioned. Achilles tendon vibration is used in motor-control research as a form of proprioceptive stimulus. Using measures of postural steadiness with nonlinear measures to elucidate control mechanisms, tendon vibration can be applied to investigate the underlying rationale of proprioceptive training. OBJECTIVE To test whether the effect of vibration on young adults' postural control depended on the support surface. DESIGN Descriptive laboratory study. SETTING Research laboratory. PATIENTS OR OTHER PARTICIPANTS Thirty healthy adults and 10 adults with chronic ankle instability (CAI; age range = 18-40 years). INTERVENTION(S) With eyes open, participants stood in bilateral stance on a rigid plate (floor), memory foam, and a Both Sides Up (BOSU) ball covering a force platform. We applied bilateral Achilles tendon vibration for the middle 20 seconds in a series of 60-second trials and analyzed participants' responses from previbration to vibration (pre-vib) and from vibration to postvibration (vib-post). MAIN OUTCOME MEASURE(S) We calculated anterior-posterior excursion of the center of pressure and complexity index derived from the area under multiscale entropy curves. RESULTS The excursion response to vibration differed by surface, as indicated by a significant interaction of P < .001 for the healthy group at both time points and for the CAI group vib-post. Although both groups demonstrated increased excursion from pre-vib and from vib-post, a decrease was observed on the BOSU. The complexity response to vibration differed by surface for the healthy group (pre-vib, P < .001). The pattern for the CAI group was similar but not significant. Complexity changes vib-post were the same on all surfaces for both groups. CONCLUSIONS Participants reacted less to ankle vibration when standing on the BOSU as compared with the floor, suggesting that proprioceptive training may not be occurring. Different balance-training paradigms to target proprioception, including tendon vibration, should be explored.
Collapse
Affiliation(s)
- Anat Vilnai Lubetzky
- Department of Physical Therapy, Steinhardt School of Culture Education and Human Performance, New York University
| | | | - Robert Price
- Department of Rehabilitation Medicine, University of Washington, Seattle
| | - Deborah Kartin
- Department of Rehabilitation Medicine, University of Washington, Seattle
| |
Collapse
|
25
|
Busa MA, van Emmerik RE. Multiscale entropy: A tool for understanding the complexity of postural control. JOURNAL OF SPORT AND HEALTH SCIENCE 2016; 5:44-51. [PMID: 30356502 PMCID: PMC6188573 DOI: 10.1016/j.jshs.2016.01.018] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 06/19/2015] [Accepted: 11/20/2015] [Indexed: 05/20/2023]
Abstract
Clinical disorders often are characterized by a breakdown in dynamical processes that contribute to the control of upright standing. Disruption to a large number of physiological processes operating at different time scales can lead to alterations in postural center of pressure (CoP) fluctuations. Multiscale entropy (MSE) has been used to identify differences in fluctuations of postural CoP time series between groups with and without known physiological impairments at multiple time scales. The purpose of this paper is to: 1) review basic elements and current developments in entropy techniques used to assess physiological complexity; and 2) identify how MSE can provide insights into the complexity of physiological systems operating at multiple time scales that underlie the control of posture. We review and synthesize evidence from the literature providing support for MSE as a valuable tool to evaluate the breakdown in the physiological processes that accompany changes due to aging and disease in postural control. This evidence emerges from observed lower MSE values in individuals with multiple sclerosis, idiopathic scoliosis, and in older individuals with sensory impairments. Finally, we suggest some future applications of MSE that will allow for further insight into how physiological deficits impact the complexity of postural fluctuations; this information may improve the development and evaluation of new therapeutic interventions.
Collapse
|