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Yıldız NT, Canlı M, Kocaman H, Kuzu Ş, Valamur İ, Yıldırım H, Alkan H. Validity and Reliability of the Timed 360° Turn Test in Individuals with Ankle Sprain. Indian J Orthop 2024; 58:1145-1152. [PMID: 39087049 PMCID: PMC11286884 DOI: 10.1007/s43465-024-01213-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Accepted: 06/18/2024] [Indexed: 08/02/2024]
Abstract
Background The Timed 360° turn test (T-360° TT) was developed to assess balance and turning ability. Although validity and reliability have been performed in different diseases, validity and reliability have not been performed in individuals with ankle sprain (AS). Purpose The purpose of this study was to investigate the validity and reliability of the T-360° TT in individuals with AS. Methods The study included 54 individuals with AS. Participants were initially evaluated with T-360° TT, Timed Up and Go (TUG) test and Biodex Balance System (BBS). To assess test-retest reliability, the T-360° TT was performed again 5 days after the first measurement by the same assessor. Results At the end of the study, strong positive correlations were found between T-360° TT with TUG test and BBS (p < 0.05). In addition, T-360° TT had excellent test-retest reliability (Intraclass correlation coefficient = 0.87). Conclusion The T-360° TT is a valid and reliable tool for the evaluation of balance and turning ability in individuals with AS. We also think that it can be used practically in clinical settings because it is a test that can be easily and quickly performed.
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Affiliation(s)
- Nazım Tolgahan Yıldız
- Faculty of Health Sciences, Deparment of Physiotherapy and Rehabilitation, Karamanoglu Mehmetbey University, Karaman, Turkey
| | - Mehmet Canlı
- School of Physical Therapy and Rehabilitation, Kırşehir Ahi Evran University, Kırşehir, Turkey
| | - Hikmet Kocaman
- Department of Physiotherapy and Rehabilitation, Prosthetics-Orthotics Physiotherapy, Karamanoglu Mehmetbey University, Karaman, Turkey
| | - Şafak Kuzu
- School of Physical Therapy and Rehabilitation, Kırşehir Ahi Evran University, Kırşehir, Turkey
| | - İrem Valamur
- School of Physical Therapy and Rehabilitation, Kırşehir Ahi Evran University, Kırşehir, Turkey
| | - Hasan Yıldırım
- Faculty of Kamil Özdağ Science, Department of Mathematics, Karamanoğlu Mehmetbey University, Karaman, Turkey
| | - Halil Alkan
- Faculty of Health Science, Deparment of Physiotherapy and Rehabilitation, Muş Alparslan University, Muş, Turkey
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Shemmell J, Falling C, MacKinnon CD, Stapley PJ, Ribeiro DC, Stinear JW. Different descending pathways mediate early and late portions of lower limb responses to transcranial magnetic stimulation. J Neurophysiol 2024; 131:1299-1310. [PMID: 38691532 DOI: 10.1152/jn.00153.2023] [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: 04/14/2023] [Revised: 04/04/2024] [Accepted: 04/29/2024] [Indexed: 05/03/2024] Open
Abstract
Although recent studies in nonhuman primates have provided evidence that transcranial magnetic stimulation (TMS) activates cells within the reticular formation, it remains unclear whether descending brain stem projections contribute to the generation of TMS-induced motor evoked potentials (MEPs) in skeletal muscles. We compared MEPs in muscles with extensive direct corticomotoneuronal input (first dorsal interosseous) versus a prominent role in postural control (gastrocnemius) to determine whether the amplitudes of early and late MEPs were differentially modulated by cortical suppression. Suprathreshold TMS was applied with and without a preceding suprathreshold TMS pulse at two interstimulus intervals (50 and 80 ms). H reflexes in target muscles were also tested with and without TMS conditioning. Early and late gastrocnemius MEPs were differentially modulated by cortical inhibition, the amplitude of the early MEP being significantly reduced by cortical suppression and the late MEP facilitated. The amplitude of H reflexes in the gastrocnemius was reduced within the cortical silent period. Early MEPs in the first dorsal interosseous were also reduced during the silent period, but late MEPs were unaffected. Independent modulation of early and late MEPs in the gastrocnemius muscle supports the idea that the MEP is generated by multiple descending pathways. Suppression of the early MEP is consistent with transmission along the fast-conducting corticospinal tract, whereas facilitation of the late MEP suggests transmission along a corticofugal, potentially cortico-reticulospinal, pathway. Accordingly, differences in late MEP modulation between the first dorsal interosseous and gastrocnemius reflect an increased role of corticofugal pathways in the control of postural muscles.NEW & NOTEWORTHY Early and late portions of the response to transcranial magnetic stimulation (TMS) in a lower limb postural muscle are modulated independently by cortical suppression, late motor evoked potentials (MEPs) being facilitated during cortical inhibition. These results suggest a cortico-brain stem transmission pathway for late portions of the TMS-induced MEP.
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Affiliation(s)
- Jonathan Shemmell
- School of Medical, Indigenous and Health Sciences, University of Wollongong, Wollongong, New South Wales, Australia
- School of Physical Education, Sport and Exercise Sciences, University of Otago, Dunedin, New Zealand
| | - Carrie Falling
- School of Physical Education, Sport and Exercise Sciences, University of Otago, Dunedin, New Zealand
- School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Colum D MacKinnon
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota, United States
| | - Paul J Stapley
- School of Medical, Indigenous and Health Sciences, University of Wollongong, Wollongong, New South Wales, Australia
| | | | - James W Stinear
- Department of Exercise Sciences, University of Auckland, Auckland, New Zealand
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Reynolds RF, Liedtke AM, Lakie M. Intrinsic ankle stiffness is associated with paradoxical calf muscle movement but not postural sway or age. Exp Physiol 2024; 109:729-737. [PMID: 38488678 PMCID: PMC11061623 DOI: 10.1113/ep091660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/26/2024] [Indexed: 05/02/2024]
Abstract
Due to Achilles tendon compliance, passive ankle stiffness is insufficient to stabilise the body when standing. This results in 'paradoxical' muscle movement, whereby calf muscles tend to shorten during forward body sway. Natural variation in stiffness may affect this movement. This may have consequences for postural control, with compliant ankles placing greater reliance upon active neural control rather than stretch reflexes. Previous research also suggests ageing reduces ankle stiffness, possibly contributing to reduced postural stability. Here we determine the relationship between ankle stiffness and calf muscle movement during standing, and whether this is associated with postural stability or age. Passive ankle stiffness was measured during quiet stance in 40 healthy volunteers ranging from 18 to 88 years of age. Medial gastrocnemius muscle length was also recorded using ultrasound. We found a significant inverse relationship between ankle stiffness and paradoxical muscle movement, that is, more compliant ankles were associated with greater muscle shortening during forward sway (r ≥ 0.33). This was seen during both quiet stance as well as voluntary sway. However, we found no significant effects of age upon stiffness, paradoxical motion or postural sway. Furthermore, neither paradoxical muscle motion nor ankle stiffness was associated with postural sway. These results show that natural variation in ankle stiffness alters the extent of paradoxical calf muscle movement during stance. However, the absence of a clear relationship to postural sway suggests that neural control mechanisms are more than capable of compensating for a lack of inherent joint stiffness.
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Affiliation(s)
- Raymond F. Reynolds
- School of Sport, Exercise & Rehabilitation SciencesUniversity of BirminghamBirminghamUK
| | - Anna M. Liedtke
- School of Sport, Exercise & Rehabilitation SciencesUniversity of BirminghamBirminghamUK
| | - Martin Lakie
- School of Sport, Exercise & Rehabilitation SciencesUniversity of BirminghamBirminghamUK
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Kania D, Romaniszyn-Kania P, Tuszy A, Bugdol M, Ledwoń D, Czak M, Turner B, Bibrowicz K, Szurmik T, Pollak A, Mitas AW. Evaluation of physiological response and synchronisation errors during synchronous and pseudosynchronous stimulation trials. Sci Rep 2024; 14:8814. [PMID: 38627479 PMCID: PMC11021516 DOI: 10.1038/s41598-024-59477-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 04/11/2024] [Indexed: 04/19/2024] Open
Abstract
Rhythm perception and synchronisation is musical ability with neural basis defined as the ability to perceive rhythm in music and synchronise body movements with it. The study aimed to check the errors of synchronisation and physiological response as a reaction of the subjects to metrorhythmic stimuli of synchronous and pseudosynchronous stimulation (synchronisation with an externally controlled rhythm, but in reality controlled or produced tone by tapping) Nineteen subjects without diagnosed motor disorders participated in the study. Two tests were performed, where the electromyography signal and reaction time were recorded using the NORAXON system. In addition, physiological signals such as electrodermal activity and blood volume pulse were measured using the Empatica E4. Study 1 consisted of adapting the finger tapping test in pseudosynchrony with a given metrorhythmic stimulus with a selection of preferred, choices of decreasing and increasing tempo. Study 2 consisted of metrorhythmic synchronisation during the heel stomping test. Numerous correlations and statistically significant parameters were found between the response of the subjects with respect to their musical education, musical and sports activities. Most of the differentiating characteristics shown evidence of some group division in the undertaking of musical activities. The use of detailed analyses of synchronisation errors can contribute to the development of methods to improve the rehabilitation process of subjects with motor dysfunction, and this will contribute to the development of an expert system that considers personalised musical preferences.
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Affiliation(s)
- Damian Kania
- Institute of Physiotherapy and Health Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Mikołowska 72A, 40-065, Katowice, Poland
| | - Patrycja Romaniszyn-Kania
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland.
| | - Aleksandra Tuszy
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland
| | - Monika Bugdol
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland
| | - Daniel Ledwoń
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland
| | - Miroslaw Czak
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland
| | - Bruce Turner
- dBs Music, HE Music Faculty, 17 St Thomas St, Redcliffe, Bristol, BS1 6JS, UK
| | - Karol Bibrowicz
- Science and Research Center of Body Posture, College of Education and Therapy in Poznań, 61-473, Poznań, Poland
| | - Tomasz Szurmik
- Faculty of Arts and Educational Science, University of Silesia, ul. Bielska 62, 43-400, Cieszyn, Poland
| | - Anita Pollak
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland
- Institute of Psychology, University of Silesia, ul. Grazynskiego 53, 40-126, Katowice, Poland
| | - Andrzej W Mitas
- Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40, 41-800, Zabrze, Poland
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Barg A, Richter M, Burssens A, de Cesar Netto C, Ellis S, Godoy-Santos AL, Lintz F. An Innovative Weightbearing Device for Weightbearing 3-Dimensional Imaging for Foot and Ankle Surgery Preoperative Planning. J Foot Ankle Surg 2024; 63:312-313. [PMID: 38010237 DOI: 10.1053/j.jfas.2022.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 12/10/2022] [Indexed: 01/20/2023]
Affiliation(s)
- Alexej Barg
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of Trauma and Orthopaedic Surgery, BG Hospital Hamburg, Hamburg, Germany; Department of Orthopaedics, University of Utah, Salt Lake City, UT; International WBCT Society, Gent, Belgium
| | - Martinus Richter
- International WBCT Society, Gent, Belgium; Department for Foot and Ankle Surgery Rummelsberg and Nuremberg, Hospital Rummelsberg, Schwarzenbruck, Germany.
| | - Arne Burssens
- International WBCT Society, Gent, Belgium; Department of Orthopaedics, Ghent University Hospital, Gent, Belgium
| | - Cesar de Cesar Netto
- International WBCT Society, Gent, Belgium; Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Scott Ellis
- International WBCT Society, Gent, Belgium; Hospital for Special Surgery, New York, NY
| | - Alexandre Leme Godoy-Santos
- International WBCT Society, Gent, Belgium; Department of Orthopaedic Surgery, University of São Paolo, São Paolo, Brazil
| | - François Lintz
- International WBCT Society, Gent, Belgium; Foot and Ankle Surgery Center, Clinique de l'Union, Saint-Jean, France
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Chen Y, Yu W, Benali A, Lu D, Kok SY, Wang R. Towards Human-like Walking with Biomechanical and Neuromuscular Control Features: Personalized Attachment Point Optimization Method of Cable-Driven Exoskeleton. Front Aging Neurosci 2024; 16:1327397. [PMID: 38371400 PMCID: PMC10870425 DOI: 10.3389/fnagi.2024.1327397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/05/2024] [Indexed: 02/20/2024] Open
Abstract
The cable-driven exoskeleton can avoid joint misalignment, and is substantial alterations in the pattern of muscle synergy coordination, which arouse more attention in recent years to facilitate exercise for older adults and improve their overall quality of life. This study leverages principles from neuroscience and biomechanical analysis to select attachment points for cable-driven soft exoskeletons. By extracting key features of human movement, the objective is to develop a subject-specific design methodology that provides precise and personalized support in the attachment points optimization of cable-driven exoskeleton to achieve natural gait, energy efficiency, and muscle coordination controllable in the domain of human mobility and rehabilitation. To achieve this, the study first analyzes human walking experimental data and extracts biomechanical features. These features are then used to generate trajectories, allowing better natural movement under complete cable-driven exoskeleton control. Next, a genetic algorithm-based method is employed to minimize energy consumption and optimize the attachment points of the cable-driven system. This process identifies connections that are better suited for the human model, leading to improved efficiency and natural movement. By comparing the calculated elderly human model driven by exoskeleton with experimental subject in terms of joint angles, joint torques and muscle forces, the human model can successfully replicate subject movement and the cable output forces can mimic human muscle coordination. The optimized cable attachment points facilitate more natural and efficient collaboration between humans and the exoskeleton, making significant contributions to the field of assisting the elderly in rehabilitation.
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Affiliation(s)
- Yasheng Chen
- School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, China
| | - Weiwei Yu
- School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, China
| | - Abderraouf Benali
- LISV, Versailles Systems Engineering Laboratory, Université de Versailles Saint Quentin en Yvelines, Paris, France
| | - Donglai Lu
- School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, China
| | - Siong Yuen Kok
- School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, China
| | - Runxiao Wang
- School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, China
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7
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Wang Y, Liu C, Ma G, Lv X, Li X. Three Hertz postural leg tremor impairs posture maintenance in multiple system atrophy-cerebellar type. Neurol Sci 2024; 45:601-612. [PMID: 37656288 DOI: 10.1007/s10072-023-07036-9] [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: 07/10/2023] [Accepted: 08/21/2023] [Indexed: 09/02/2023]
Abstract
BACKGROUND Three-Hz postural leg tremor has recently been identified as highly prevalent in patients with the cerebellar type of multiple system atrophy, but its impact on posture maintenance remains poorly understood. PATIENTS AND METHODS Thirty-seven patients with spinocerebellar ataxia and 58 others with cerebellar type of multiple system atrophy were given Synapsys posturography examinations. Fifty-three healthy controls were also tested. Low, medium, and high-frequency sway were recorded to compute energy values. Frequency shift and postural strategy predominance were evaluated from the postural sway distributions, mainly from the proportions of higher frequency values among the total values. The trajectories of postural sway components were evaluated with the generalized additive mixed model. Distributions of the components and their relationships with falls and tremors were assessed through repeated measures correlation analysis. RESULTS As the test difficulty increased, the standard controls showed slight increases in the energy values at every frequency. Distributions of the higher frequency (>0.5 Hz) values increased escalatingly with test difficulty, illustrating frequency shifts and hip strategy predominance. Medium and high-frequency values were strongly and positively inter-correlated in normal stances, but this was not observed among the spinocerebellar ataxia or multiple system atrophy patients. Unlike normal stances, the proportion of medium frequency values was negatively related to the total value among the spinocerebellar ataxia and multiple system atrophy patients, implying a failure of frequency shift in response to perturbation. Medium frequency proportions were also inversely correlated with tremors among the multiple system atrophy patients. CONCLUSIONS The observed synchronized changes in medium and high-frequency postural sway indicate that they constitute a complete hip strategy for posture control. The strategy was rigid in those with spinocerebellar ataxia but completely disrupted in those with multiple system atrophy. Three Hertz postural leg tremors destabilize the ankle joints and interfere with postural adjustment among those with multiple system atrophy.
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Affiliation(s)
- Yuzhou Wang
- Department of Neurology, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Churong Liu
- Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, China
- Department of Neurorehabilitation, Guangdong 999 Brain Hospital, Guangzhou, China
| | - Gengmao Ma
- Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, China
- Department of Neurorehabilitation, Guangdong 999 Brain Hospital, Guangzhou, China
| | - Xiao Lv
- Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, China
- Department of Neurology, Guangdong 999 Brain Hospital, Guangzhou, China
| | - Xiaodi Li
- Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, China.
- Department of Neurology, Guangdong 999 Brain Hospital, Guangzhou, China.
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Johnson E, Ellmers TJ, Muehlbauer T, Lord SR, Hill MW. Effects of free versus restricted arm movements on postural control in normal and modified sensory conditions in young and older adults. Exp Gerontol 2023; 184:112338. [PMID: 38016571 DOI: 10.1016/j.exger.2023.112338] [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: 08/07/2023] [Revised: 11/08/2023] [Accepted: 11/24/2023] [Indexed: 11/30/2023]
Abstract
The purpose of this study was to explore the effects of arm movements on postural control when standing under different sensory conditions in healthy young and older adults. Fifteen young (mean ± SD age; 21.3 ± 4.2 years) and 15 older (mean ± SD age; 73.3 ± 5.0 years) adults completed the modified Romberg test, which uses four task manipulations (i.e. eyes open and eyes closed on a firm and foam surface) to compromise the fidelity of sensory feedback mechanisms. Each participant completed the tasks under two arm movement conditions: restricted and free arm movements. Centre of pressure (COP) range and frequency were calculated to characterise postural performance and strategy, respectively. Older adults showed greater COP range with restricted compared to free arm movements during all modified sensory conditions, with these effects most prominent in the medio-lateral (ML) plane (all p < .05, Cohen's d = 0.69-1.61). Compared to the free arm movement condition, there was an increase in ML displacement and frequency when arm movements were restricted during only the most challenging (i.e. vestibular dominant) task in young adults (all p < .05, d = 0.645-0.83). Finally, main age effects for the arm restriction cost (p < .05) indicates a greater reliance on an upper body strategy in older compared to young adults, independent of sensory availability/accuracy. These findings indicate that older adults compensate for the loss of accuracy in sensory input by increasing reliance on upper body movement strategies.
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Affiliation(s)
- E Johnson
- Centre for Physical Activity, Sport and Exercise Sciences, Coventry University, Coventry, United Kingdom
| | - T J Ellmers
- Department of Brain Sciences, Imperial College London, London, United Kingdom
| | - T Muehlbauer
- Division of Movement and Training Sciences/Biomechanics of Sport, University of Duisburg-Essen, Essen, Germany
| | - S R Lord
- Falls, Balance and Injury Research Centre, Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - M W Hill
- Centre for Physical Activity, Sport and Exercise Sciences, Coventry University, Coventry, United Kingdom.
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Fadil R, Huether AXA, Sadeghian F, Verma AK, Blaber AP, Lou JS, Tavakolian K. The Effect of Skeletal Muscle-Pump on Blood Pressure and Postural Control in Parkinson's Disease. Cardiovasc Eng Technol 2023; 14:755-773. [PMID: 37749359 DOI: 10.1007/s13239-023-00685-z] [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: 11/07/2022] [Accepted: 09/06/2023] [Indexed: 09/27/2023]
Abstract
PURPOSE Activation of the calf (gastrocnemius and soleus) and tibialis anterior muscles play an important role in blood pressure regulation (via muscle-pump mechanism) and postural control. Parkinson's disease is associated with calf (and tibialis anterior muscles weakness and stiffness, which contribute to postural instability and associated falls. In this work, we studied the role of the medial and lateral gastrocnemius, tibialis anterior, and soleus muscle contractions in maintaining blood pressure and postural stability in Parkinson's patients and healthy controls during standing. In addition, we investigated whether the activation of the calf and tibialis anterior muscles is baroreflex dependent or postural-mediated. METHODS We recorded electrocardiogram, blood pressure, center of pressure as a measure of postural sway, and muscle activity from the medial and lateral gastrocnemius, tibialis anterior, and soleus muscles from twenty-six Parkinson's patients and eighteen sex and age-matched healthy controls during standing and with eyes open. The interaction and bidirectional causalities between the cardiovascular, musculoskeletal, and postural variables were studied using wavelet transform coherence and convergent cross-mapping techniques, respectively. RESULTS Parkinson's patients experienced a higher postural sway and demonstrated mechanical muscle-pump dysfunction of all individual leg muscles, all of which contribute to postural instability. Moreover, our results showed that coupling between the cardiovascular, musculoskeletal, and postural variables is affected by Parkinson's disease while the contribution of the calf and tibialis anterior muscles is greater for blood pressure regulation than postural sway. CONCLUSION The outcomes of this study could assist in the development of appropriate physical exercise programs that target lower limb muscles to improve the muscle-pump function and reduce postural instability in Parkinson's disease.
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Affiliation(s)
- Rabie Fadil
- Biomedical Engineering Program, University of North Dakota, Grand Forks, ND, USA
| | - Asenath X A Huether
- Parkinson Disease Research Laboratory, Department of Neurology, Sanford Health, Fargo, ND, USA
| | - Farshid Sadeghian
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
| | - Ajay K Verma
- Biomedical Engineering Program, University of North Dakota, Grand Forks, ND, USA
| | - Andrew P Blaber
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
| | - Jau-Shin Lou
- Parkinson Disease Research Laboratory, Department of Neurology, Sanford Health, Fargo, ND, USA
- Department of Neurology, University of North Dakota, School of Medicine, and Health Sciences, Grand Forks, USA
| | - Kouhyar Tavakolian
- Biomedical Engineering Program, University of North Dakota, Grand Forks, ND, USA.
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada.
- Biomedical Engineering Program, University of North Dakota, 243 Centennial Drive, Upson Hall II, Room 11, Grand Forks, ND, 58202, USA.
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10
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Ferràs-Tarragó J. Letter to the Editor Response. An Innovative Weightbearing Device for Weightbearing 3-Dimensional Imaging for Foot and Ankle Surgery Preoperative Planning. J Foot Ankle Surg 2023; 62:1005. [PMID: 36781351 DOI: 10.1053/j.jfas.2022.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 12/23/2022] [Indexed: 01/20/2023]
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11
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Cohen JW, Vieira TM, Ivanova TD, Garland SJ. Regional recruitment and differential behavior of motor units during postural control in older adults. J Neurophysiol 2023; 130:1321-1333. [PMID: 37877159 DOI: 10.1152/jn.00068.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 10/23/2023] [Accepted: 10/23/2023] [Indexed: 10/26/2023] Open
Abstract
Aging is associated with neuromuscular system changes that may have implications for the recruitment and firing behaviors of motor units (MUs). In previous studies, we observed that young adults recruit subpopulations of triceps surae MUs during tasks that involved leaning in five directions: common units that were active during different leaning directions and unique units that were active in only one leaning direction. Furthermore, the MU subpopulation firing behaviors [average firing rate (AFR), coefficient of variation (CoVISI), and intermittent firing] modulated with leaning direction. The purpose of this study was to examine whether older adults exhibited this regional recruitment of MUs and firing behaviors. Seventeen older adults (aged 74.8 ± 5.3 yr) stood on a force platform and maintained their center of pressure leaning in five directions. High-density surface electromyography recordings from the triceps surae were decomposed into single MU action potentials. A MU tracking analysis identified groups of MUs as being common or unique across the leaning directions. Although leaning in different directions did not affect the AFR and CoVISI of common units (P > 0.05), the unique units responded to the leaning directions by increasing AFR and CoVISI, albeit modestly (F = 18.51, P < 0.001). The unique units increased their intermittency with forward leaning (F = 9.22, P = 0.003). The mediolateral barycenter positions of MU activity in both subpopulations were found in similar locations for all leaning directions (P > 0.05). These neuromuscular changes may contribute to the reduced balance performance seen in older adults.NEW & NOTEWORTHY In this study, we observed differences in motor unit recruitment and firing behaviors of distinct subpopulations of motor units in the older adult triceps surae muscle from those observed in the young adult. Our results suggest that the older adult central nervous system may partially lose the ability to regionally recruit and differentially control motor units. This finding may be an underlying cause of balance difficulties in older adults during directionally challenging leaning tasks.
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Affiliation(s)
- Joshua W Cohen
- School of Kinesiology, Western University, London, Ontario, Canada
- Faculty of Health Sciences, School of Physical Therapy, Western University, London, Ontario, Canada
| | - Taian M Vieira
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
| | - Tanya D Ivanova
- Faculty of Health Sciences, School of Physical Therapy, Western University, London, Ontario, Canada
| | - S Jayne Garland
- Faculty of Health Sciences, School of Physical Therapy, Western University, London, Ontario, Canada
- Collaborative Specialization in Musculoskeletal Health Research, Bone and Joint Institute, Western University, London, Ontario, Canada
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Martin‐Rodriguez S, Gonzalez‐Henriquez JJ, Galvan‐Alvarez V, Cruz‐Ramírez S, Calbet JA, Sanchis‐Moysi J. Architectural anatomy of the human tibialis anterior presents morphological asymmetries between superficial and deep unipennate regions. J Anat 2023; 243:664-673. [PMID: 36999195 PMCID: PMC10485583 DOI: 10.1111/joa.13864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 04/01/2023] Open
Abstract
The tibialis anterior muscle plays a critical role in human ambulation and contributes to maintaining the upright posture. However, little is known about its muscle architecture in males and females. One hundred and nine physically active males and females were recruited. Tibialis anterior muscle thickness, pennation angle, and fascicle length were measured at rest in both unipennate regions of both legs using real-time ultrasound imaging. A linear mixed model was used with muscle thickness, pennation angle, or fascicle length as the dependent variables. All models were carried out with and without total leg lean mass and shank length as covariates. Causal mediation analysis was computed to explore the effect of muscle thickness on the relationship between fascicle length and pennation angle. There were no significant differences between dominant and nondominant legs regarding muscle architecture. Muscle thickness and pennation angle were greater in the deep than the superficial unipennate region in males (1.9 mm and 1.1°, p < 0.001) and women (3.4 mm and 2.2°, p < 0.001). However, the fascicle length was similar in both regions for both sexes. The differences remained significant after accounting for differences in leg lean mass and shank length. In both regions, muscle thickness was 1-3 mm greater in males and superficial pennation angle 2° smaller in females (both, p < 0.001). After accounting for leg lean mass and shank length, sex differences remained for muscle thickness (1.6 mm, p < 0.05) and pennation angle (3.4°, p < 0.001) but only in the superficial region. In both regions, leg lean mass and shank-adjusted fascicle length were 1.4 mm longer in females than males (p < 0.05). The causal mediation analysis revealed that the estimation of fascicle length was positive, suggesting that a 10% increase in muscle thickness would augment the fascicle length, allowing a 0.38° pennation angle decrease. Moreover, the pennation angle increases in total by 0.54° due to the suppressive effect of the increase in fascicle length. The estimated mediation, direct, and total effects were all significantly different from zero (p < 0.001). Overall, our results indicate that the architectural anatomy of the tibialis anterior shows sexual dimorphism in humans. Tibialis anterior presents morphological asymmetries between superficial and deep unipennate regions in both sexes. Lastly, our causal mediation model identified a suppressive effect of fascicle length on the pennation angle, suggesting that increments in muscle thickness are not always aligned with increments in fascicle length or the pennation angle.
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Affiliation(s)
- Saúl Martin‐Rodriguez
- Department of Physical EducationUniversity of Las Palmas de Gran CanariaLas Palmas de Gran CanariaSpain
- Research Institute of Biomedical and Health Sciences (IUIBS)Las Palmas de Gran CanariaSpain
| | - Juan Jose Gonzalez‐Henriquez
- Research Institute of Biomedical and Health Sciences (IUIBS)Las Palmas de Gran CanariaSpain
- Department of MathematicsUniversity of Las Palmas de Gran CanariaLas Palmas de Gran CanariaSpain
| | - Victor Galvan‐Alvarez
- Department of Physical EducationUniversity of Las Palmas de Gran CanariaLas Palmas de Gran CanariaSpain
- Research Institute of Biomedical and Health Sciences (IUIBS)Las Palmas de Gran CanariaSpain
| | - Sara Cruz‐Ramírez
- Department of Physical EducationUniversity of Las Palmas de Gran CanariaLas Palmas de Gran CanariaSpain
| | - José A. Calbet
- Department of Physical EducationUniversity of Las Palmas de Gran CanariaLas Palmas de Gran CanariaSpain
- Research Institute of Biomedical and Health Sciences (IUIBS)Las Palmas de Gran CanariaSpain
- Department of Physical PerformanceThe Norwegian School of Sport SciencesOsloNorway
| | - Joaquín Sanchis‐Moysi
- Department of Physical EducationUniversity of Las Palmas de Gran CanariaLas Palmas de Gran CanariaSpain
- Research Institute of Biomedical and Health Sciences (IUIBS)Las Palmas de Gran CanariaSpain
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13
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Roach C, Love C, Allen T, Proske U. The contribution of muscle spindles to position sense measured with three different methods. Exp Brain Res 2023; 241:2433-2450. [PMID: 37653105 PMCID: PMC10520194 DOI: 10.1007/s00221-023-06689-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 08/11/2023] [Indexed: 09/02/2023]
Abstract
The sense of limb position is important, because it is believed to contribute to our sense of self-awareness. Muscle spindles, including both primary and secondary endings of spindles, are thought to be the principal position sensors. Passive spindles possess a property called thixotropy which allows their sensitivity to be manipulated. Here, thixotropic patterns of position errors have been studied with three commonly used methods of measurement of position sense. The patterns of errors have been used as indicators of the influence exerted by muscle spindles on a measured value of position sense. In two-arm matching, the blindfolded participant indicates the location of one arm by placement of the other. In one-arm pointing, the participant points to the perceived position of their other, hidden arm. In repositioning, one of the blindfolded participant's arms is placed at a chosen angle and they are asked to remember its position and then, after a delay, reproduce the position. The three methods were studied over the full range of elbow angles between 5° (elbow extension) and 125° (elbow flexion). Different outcomes were achieved with each method; in two-arm matching, position errors were symmetrical about zero and thixotropic influences were large, while in one-arm pointing, errors were biased towards extension. In repositioning, thixotropic effects were small. We conclude that each of the methods of measuring position sense comprises different mixes of peripheral and central influences. This will have to be taken into consideration by the clinician diagnosing disturbances in position sense.
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Affiliation(s)
- Christopher Roach
- Department of Physiology, Monash University, Clayton, Victoria, 3800, Australia
| | - Christopher Love
- Department of Physiology, Monash University, Clayton, Victoria, 3800, Australia
| | - Trevor Allen
- Department of Physiology, Monash University, Clayton, Victoria, 3800, Australia.
- Accident Research Centre, Monash University, Clayton, Victoria, 3800, Australia.
| | - Uwe Proske
- Department of Physiology, Monash University, Clayton, Victoria, 3800, Australia
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14
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Martínez-Jiménez EM, Jiménez-Fernández R, Corral-Liria I, Rodríguez-Sanz D, Calvo-Lobo C, López-López D, Pérez-Boal E, Trevissón-Redondo B, Grande-del-Arco J. Effects of Myofascial Induction Therapy on Ankle Range of Motion and Pressure Pain Threshold in Trigger Points of the Gastrocnemius-A Clinical Trial. Biomedicines 2023; 11:2590. [PMID: 37761030 PMCID: PMC10526438 DOI: 10.3390/biomedicines11092590] [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: 08/08/2023] [Revised: 09/13/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND The myofascial induction technique (MIT) has been shown to increase shoulder range of motion (ROM) in breast cancer survivors and decrease pain pressure threshold over the radial nerve in patients with epicondylalgia. To the authors' best knowledge, no study on trigger points and MIT has been published to date. The effect on ROM of latent trigger points is also unknown. METHODS A total of 20 twins with one latent trigger point of the gastrocnemius muscle were evaluated pre- and post-MIT in the calf. We measured static footprint variables in a pre-post study. RESULTS We found differences in PPT (p = 0.001) and no differences in ROM with knee flexed (p = 0.420) or stretched (p = 0.069). CONCLUSIONS After Calf MIT, latent myofascial trigger points improve PPT but no change in ankle dorsiflexion with knee bent or knee flexed were found in non-restriction healthy subjects.
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Affiliation(s)
- Eva María Martínez-Jiménez
- Nursing Department, Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain; (E.M.M.-J.); (D.R.-S.); (C.C.-L.); (J.G.-d.-A.)
| | - Raquel Jiménez-Fernández
- Department of Nursing and Stomatology, Faculty of Health Sciences, King Juan Carlos University, Alcorcon Campus, 28922 Madrid, Spain;
| | - Inmaculada Corral-Liria
- Department of Nursing and Stomatology, Faculty of Health Sciences, King Juan Carlos University, Alcorcon Campus, 28922 Madrid, Spain;
| | - David Rodríguez-Sanz
- Nursing Department, Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain; (E.M.M.-J.); (D.R.-S.); (C.C.-L.); (J.G.-d.-A.)
| | - César Calvo-Lobo
- Nursing Department, Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain; (E.M.M.-J.); (D.R.-S.); (C.C.-L.); (J.G.-d.-A.)
| | - Daniel López-López
- Research, Health, and Podiatry Group, Department of Health Sciences, Faculty of Nursing and Podiatry, Industrial Campus of Ferrol, Universidade da Coruña, 15403 Ferrol, Spain;
| | - Eduardo Pérez-Boal
- Department of Nursing and Physiotherapy, Faculty of Health Sciences, Universidad de León, 24007 León, Spain;
| | - Bibiana Trevissón-Redondo
- Department of Nursing and Physiotherapy, Faculty of Health Sciences, Universidad de León, 24007 León, Spain;
| | - Jessica Grande-del-Arco
- Nursing Department, Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain; (E.M.M.-J.); (D.R.-S.); (C.C.-L.); (J.G.-d.-A.)
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15
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Jo D, Bilodeau M. Sex differences concerning the effects of ankle muscle fatigue on static postural control and spinal proprioceptive input at the ankle. Front Hum Neurosci 2023; 17:1015597. [PMID: 37476006 PMCID: PMC10355328 DOI: 10.3389/fnhum.2023.1015597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 06/21/2023] [Indexed: 07/22/2023] Open
Abstract
Aims The main aim of this study was to determine sex differences in postural control changes with ankle muscle fatigue during a standing forward leaning (FL) task under different vision conditions. The secondary aim was to examine sex differences in the effect of fatigue on soleus (SOL) H-reflex amplitude, a measure of motoneuron excitability with activation of Ia afferents. Methods Fifteen healthy young adult males (mean age: 28.0 years) and 16 healthy young adult females (mean age: 26.1 years) were asked to perform four consecutive FL tasks [30 s; two with eyes open (EO) and two with eyes closed (EC)] before, and immediately following a fatiguing exercise consisting of alternating ankle plantarflexion (6 s) and dorsiflexion (2 s) maximal isometric contractions, and at 5 and 10 min of recovery. Center of pressure (COP) sway variables (mean position, standard deviation, ellipse area, average velocity, and frequency), an ankle co-contraction index, and a ratio of SOL H-reflex to the maximum amplitude of the compound muscle action potential (M-max) were obtained during the FL tasks. A rating of perceived fatigue (RPF) was also documented at the different time points. Results Time to task failure (reduction of 50% in maximal voluntary isometric contraction torque of ankle plantar flexors) and the increase in RPF value were not significantly different between males and females. Both sex groups showed similar and significant increases (p < 0.05) in mean COP sway velocity with no significant changes in co-contraction indices. No significant effects of fatigue and related interactions were found for SOL H/M-max ratio. Discussion The absence of a significant sex difference in postural control change (sway and co-contraction) with fatigue could be explained by similar perceived (RPF) and performance fatigability (exercise duration) between males and females in the present study. Fatigue did not lead to significant changes in SOL spinal motoneuron excitability with activation of Ia afferents.
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Affiliation(s)
- Donguk Jo
- School of Rehabilitation Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
- Aging and Movement Laboratory, Bruyère Research Institute, Ottawa, ON, Canada
| | - Martin Bilodeau
- School of Rehabilitation Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
- Aging and Movement Laboratory, Bruyère Research Institute, Ottawa, ON, Canada
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
- LIFE Research Institute, University of Ottawa, Ottawa, ON, Canada
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16
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Ferràs-Tarragó J. Letter to the Editor Response. An Innovative Weightbearing Device for Weightbearing 3-Dimensional Imaging for Foot and Ankle Surgery Preoperative Planning. J Foot Ankle Surg 2023; 62:753. [PMID: 36710139 DOI: 10.1053/j.jfas.2022.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 01/09/2023]
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17
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VOLKAN YAZICI M, ÇOBANOĞLU G, YAZICI G, ELBASAN B. Effects of progressive functional ankle exercises in spastic cerebral palsy, plantarflexors versus dorsiflexors: a randomized trial. Turk J Med Sci 2023; 53:1166-1177. [PMID: 38812998 PMCID: PMC10763803 DOI: 10.55730/1300-0144.5682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 10/26/2023] [Accepted: 05/31/2023] [Indexed: 05/31/2024] Open
Abstract
Background/aim Children with cerebral palsy (CP), even those who have very mild impairment, have lower muscle strength than their typically developing peers. The ankle dorsiflexors (DFs) and plantarflexors (PFs) of children with CP are especially weak. Weakness in the ankle muscles causes problems in functional skills, mobility, and balance in spastic CP (SCP). The aim of this study was to investigate the effects of progressive functional exercises (PFEs) on the DF, PF, or dorsi-plantar flexor (DPF) muscles in children with SCP, specifically, the functional mobility, balance, and maximum voluntary contraction (MVC), and compare the effects of strengthening these muscles individually or combined. Materials and methods This randomized trial was conducted between December 1st, 2018, and May 15th, 2019, at Gazi University, Department of Physiotherapy and Rehabilitation. Randomly assigned into groups were 27 independently ambulant patients with unilateral/bilateral SCP, where PFEs were applied to the DF, PF, or DPF muscles. Muscle tone, balance, and functional mobility were assessed. The MVC was evaluated by surface electromyography. PFEs were performed 4 times a week, for 6 weeks. Results The spasticity of the PF muscles decreased in all of the groups. PFE of the DF muscles led to an increase in ankle joint range of motion (ROM) and improved functional mobility (p < 0.05). PFE of the PF muscles resulted in improvements in balance and functional mobility (p < 0.05). PFE of the DPF muscles brought about improvements in balance but not in functional mobility (p < 0.05). No significant difference in the MVC was observed in any of the groups (p > 0.05). Conclusion Gains are obtained according to the function of a muscle group. By training the DF muscles, it is possible to improve function and ROM. Furthermore, training the PF muscles led to improvements in balance and functional mobility, indicating that it is possible to bring about positive changes in spastic muscles. This study showed that muscle groups must be exercised according to the intended goal.
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Affiliation(s)
- Melek VOLKAN YAZICI
- Department of Physical Therapy and Rehabilitation, Faculty of Health Sciences, Yüksek İhtisas University, Ankara,
Turkiye
| | - Gamze ÇOBANOĞLU
- Department of Physical Therapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara,
Turkiye
| | - Gökhan YAZICI
- Department of Physical Therapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara,
Turkiye
| | - Bülent ELBASAN
- Department of Physical Therapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara,
Turkiye
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18
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ALCAN V, ZİNNUROĞLU M. Current developments in surface electromyography. Turk J Med Sci 2023; 53:1019-1031. [PMID: 38813041 PMCID: PMC10763750 DOI: 10.55730/1300-0144.5667] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/26/2023] [Accepted: 03/26/2023] [Indexed: 05/31/2024] Open
Abstract
Background/aim Surface electromyography (surface EMG) is a primary technique to detect the electrical activities of muscles through surface electrodes. In recent years, surface EMG applications have grown from conventional fields into new fields. However, there is a gap between the progress in the research of surface EMG and its clinical acceptance, characterized by the translational knowledge and skills in the widespread use of surface EMG among the clinician community. To reduce this gap, it is necessary to translate the updated surface EMG applications and technological advances into clinical research. Therefore, we aimed to present a perspective on recent developments in the application of surface EMG and signal processing methods. Materials and methods We conducted this scoping review following the Joanna Briggs Institute (JBI) method. We conducted a general search of PubMed and Web of Science to identify key search terms. Following the search, we uploaded selected articles into Rayyan and removed duplicates. After prescreening 133 titles and abstracts, we assessed 91 full texts according to the inclusion criteria. Results We concluded that surface EMG has made innovative technological progress and has research potential for routine clinical applications and a wide range of applications, such as neurophysiology, sports and art performances, biofeedback, physical therapy and rehabilitation, assessment of physical exercises, muscle strength, fatigue, posture and postural control, movement analysis, muscle coordination, motor synergies, modelling, and more. Novel methods have been applied for surface EMG signals in terms of time domain, frequency domain, time-frequency domain, statistical methods, and nonlinear methods. Conclusion Translating innovations in surface EMG and signal analysis methods into routine clinical applications can be a helpful tool with a growing and valuable role in muscle activation measurement in clinical practices. Thus, researchers must build many more interfaces that give opportunities for continuing education and research with more contemporary techniques and devices.
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Affiliation(s)
- Veysel ALCAN
- Department of Electrical and Electronics Engineering, Engineering Faculty, Tarsus University, Mersin,
Turkiye
| | - Murat ZİNNUROĞLU
- Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Gazi University, Ankara,
Turkiye
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19
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Sakuraya T, Sekiya SI, Emura K, Sonomura T, Hirasaki E, Arakawa T. Comparison of the soleus and plantaris muscles in humans and other primates: Macroscopic neuromuscular anatomy and evolutionary significance. Anat Rec (Hoboken) 2023; 306:386-400. [PMID: 35655371 DOI: 10.1002/ar.24999] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/26/2022] [Accepted: 05/11/2022] [Indexed: 01/25/2023]
Abstract
In humans, the soleus is more developed compared to other primates and has a unique architecture composed of anterior bipennate and posterior unipennate parts, which are innervated by different nerve branches. The anterior part of the human soleus was proposed to be important for bipedalism, however, the phylogenetic process resulting in its acquisition remains unclear. Providing insights into this process, the anterior part of the soleus was suggested to be closely related to the plantaris based on the branching pattern of their nerve fascicles. To reveal the phylogeny of the soleus and plantaris in primates, the innervation patterns of the posterior crural muscles were compared among a wide range of species. From their branching pattern, posterior crural muscles could be classified into superficial and deep muscle groups. The anterior part of the soleus and plantaris both belonged to the deep muscle group. In all the examined specimens of ring-tailed lemurs and chimpanzees, as well as in one out of two specimens of siamang, the nerve branches corresponding to those innervating the anterior part of the human soleus were found. The muscular branches innervating the anterior part of the soleus and plantaris formed a common trunk or were connected in all the specimens. These results indicate that the anterior part of the soleus is closely related to the plantaris across different species of primates. In turn, this suggests that the anterior part of the soleus is maintained among primates, and especially in humans, where it develops as the characteristic bipennate structure.
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Affiliation(s)
- Tohma Sakuraya
- Department of Rehabilitation Sciences, Kobe University Graduate School of Health Sciences, Kobe, Japan.,Department of Anatomy, Division of Oral Structure, Function and Development, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - Shin-Ichi Sekiya
- Faculty of Nursing, Niigata College of Nursing, Joetsu, Japan.,Department of Zoology, National Museum of Nature and Science, Tsukuba, Ibaraki, Japan
| | - Kenji Emura
- Faculty of Health Care Sciences, Himeji Dokkyo University, Himeji, Japan
| | - Takahiro Sonomura
- Department of Anatomy, Division of Oral Structure, Function and Development, Asahi University School of Dentistry, Mizuho, Gifu, Japan
| | - Eishi Hirasaki
- Section of Evolutionary Morphology, Primate Research Institute, Kyoto University, Inuyama, Aichi, Japan
| | - Takamitsu Arakawa
- Department of Rehabilitation Sciences, Kobe University Graduate School of Health Sciences, Kobe, Japan
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20
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Cohen JW, Vieira TM, Ivanova TD, Garland SJ. Differential behavior of distinct motoneuron pools that innervate the triceps surae. J Neurophysiol 2023; 129:272-284. [PMID: 36475977 DOI: 10.1152/jn.00336.2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
It has been shown that when humans lean in various directions, the central nervous system (CNS) recruits different motoneuron pools for task completion; common units that are active during different leaning directions, and unique units that are active in only one leaning direction. We used high-density surface electromyography (HD-sEMG) to examine if motor unit (MU) firing behavior was dependent on leaning direction, muscle (medial and lateral gastrocnemius; soleus), limits of stability, or whether a MU is considered common or unique. Fourteen healthy participants stood on a force platform and maintained their center of pressure in five different leaning directions. HD-sEMG recordings were decomposed into MU action potentials and the average firing rate (AFR), coefficient of variation (CoVISI), and firing intermittency were calculated on the MU spike trains. During the 30°-90° leaning directions both unique units and common units had higher firing rates (F = 31.31, P < 0.0001). However, the unique units achieved higher firing rates compared with the common units (mean estimate difference = 3.48 Hz, P < 0.0001). The CoVISI increased across directions for the unique units but not for the common units (F = 23.65, P < 0.0001). Finally, intermittent activation of MUs was dependent on the leaning direction (F = 11.15, P < 0.0001), with less intermittent activity occurring during diagonal and forward-leaning directions. These results provide evidence that the CNS can preferentially control separate motoneuron pools within the ankle plantarflexors during voluntary leaning tasks for the maintenance of standing balance.NEW & NOTEWORTHY In this study, we demonstrate that the different subpopulations of motor units within the three muscles comprising the ankle plantarflexors behave differently during multidirectional leaning. Our results suggest that the central nervous system has the capability to control distinct subpopulations of motor units to meet the force requirements necessary for leaning. This may allow for a precise, efficient, and flexible control strategy for the maintenance of standing balance.
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Affiliation(s)
- Joshua W Cohen
- School of Kinesiology, Western University, London, Ontario, Canada.,Collaborative Specialization in Musculoskeletal Health Research, Bone and Joint Institute, Western University, London, Ontario, Canada
| | - Taian M Vieira
- Laboratorio di Ingegneria del Sistema Neuromuscolare (LISiN), Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Turin, Italy
| | - Tanya D Ivanova
- Physical Therapy, Faculty of Health Sciences, Western University, London, Ontario, Canada
| | - S Jayne Garland
- Physical Therapy, Faculty of Health Sciences, Western University, London, Ontario, Canada.,Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
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21
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Shirzadi M, Marateb HR, Rojas-Martínez M, Mansourian M, Botter A, Vieira Dos Anjos F, Martins Vieira T, Mañanas MA. A real-time and convex model for the estimation of muscle force from surface electromyographic signals in the upper and lower limbs. Front Physiol 2023; 14:1098225. [PMID: 36923291 PMCID: PMC10009160 DOI: 10.3389/fphys.2023.1098225] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/01/2023] [Indexed: 03/02/2023] Open
Abstract
Surface electromyography (sEMG) is a signal consisting of different motor unit action potential trains and records from the surface of the muscles. One of the applications of sEMG is the estimation of muscle force. We proposed a new real-time convex and interpretable model for solving the sEMG-force estimation. We validated it on the upper limb during isometric voluntary flexions-extensions at 30%, 50%, and 70% Maximum Voluntary Contraction in five subjects, and lower limbs during standing tasks in thirty-three volunteers, without a history of neuromuscular disorders. Moreover, the performance of the proposed method was statistically compared with that of the state-of-the-art (13 methods, including linear-in-the-parameter models, Artificial Neural Networks and Supported Vector Machines, and non-linear models). The envelope of the sEMG signals was estimated, and the representative envelope of each muscle was used in our analysis. The convex form of an exponential EMG-force model was derived, and each muscle's coefficient was estimated using the Least Square method. The goodness-of-fit indices, the residual signal analysis (bias and Bland-Altman plot), and the running time analysis were provided. For the entire model, 30% of the data was used for estimation, while the remaining 20% and 50% were used for validation and testing, respectively. The average R-square (%) of the proposed method was 96.77 ± 1.67 [94.38, 98.06] for the test sets of the upper limb and 91.08 ± 6.84 [62.22, 96.62] for the lower-limb dataset (MEAN ± SD [min, max]). The proposed method was not significantly different from the recorded force signal (p-value = 0.610); that was not the case for the other tested models. The proposed method significantly outperformed the other methods (adj. p-value < 0.05). The average running time of each 250 ms signal of the training and testing of the proposed method was 25.7 ± 4.0 [22.3, 40.8] and 11.0 ± 2.9 [4.7, 17.8] in microseconds for the entire dataset. The proposed convex model is thus a promising method for estimating the force from the joints of the upper and lower limbs, with applications in load sharing, robotics, rehabilitation, and prosthesis control for the upper and lower limbs.
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Affiliation(s)
- Mehdi Shirzadi
- Automatic Control Department (ESAII), Biomedical Engineering Research Centre (CREB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Barcelona, Spain
| | - Hamid Reza Marateb
- Biomedical Engineering Department, Engineering Faculty, University of Isfahan, Isfahan, Iran
| | - Mónica Rojas-Martínez
- Automatic Control Department (ESAII), Biomedical Engineering Research Centre (CREB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Barcelona, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Marjan Mansourian
- Automatic Control Department (ESAII), Biomedical Engineering Research Centre (CREB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Barcelona, Spain
| | - Alberto Botter
- Laboratory for Engineering of the Neuromuscular System (LISiN), Department of Electronics and Telecommunication, Politecnico di Torino, Turin, Italy
| | - Fabio Vieira Dos Anjos
- Postgraduate Program of Rehabilitation Sciences, Augusto Motta University (UNISUAM), Rio de Janeiro, Brazil
| | - Taian Martins Vieira
- Laboratory for Engineering of the Neuromuscular System (LISiN), Department of Electronics and Telecommunication, Politecnico di Torino, Turin, Italy
| | - Miguel Angel Mañanas
- Automatic Control Department (ESAII), Biomedical Engineering Research Centre (CREB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Barcelona, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
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Sozzi S, Do MC, Schieppati M. Vertical ground reaction force oscillation during standing on hard and compliant surfaces: The “postural rhythm”. Front Neurol 2022; 13:975752. [PMID: 36119676 PMCID: PMC9475112 DOI: 10.3389/fneur.2022.975752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/10/2022] [Indexed: 11/14/2022] Open
Abstract
When a person stands upright quietly, the position of the Centre of Mass (CoM), the vertical force acting on the ground and the geometrical configuration of body segments is accurately controlled around to the direction of gravity by multiple feedback mechanisms and by integrative brain centres that coordinate multi-joint movements. This is not always easy and the postural muscles continuously produce appropriate torques, recorded as ground reaction force by a force platform. We studied 23 young adults during a 90 s period, standing at ease on a hard (Solid) and on a compliant support (Foam) with eyes open (EO) and with eyes closed (EC), focusing on the vertical component of the ground reaction force (VGRF). Analysis of VGRF time series gave the amplitude of their rhythmic oscillations (the root mean square, RMS) and of their frequency spectrum. Sway Area and Path Length of the Centre of Pressure (CoP) were also calculated. VGRF RMS (as well as CoP sway measures) increased in the order EO Solid ≈ EC Solid < EO Foam < EC Foam. The VGRF frequency spectra featured prevailing frequencies around 4–5 Hz under all tested conditions, slightly higher on Solid than Foam support. Around that value, the VGRF frequencies varied in a larger range on hard than on compliant support. Sway Area and Path Length were inversely related to the prevailing VGRF frequency. Vision compared to no-vision decreased Sway Area and Path Length and VGRF RMS on Foam support. However, no significant effect of vision was found on VGRF mean frequency for either base of support condition. A description of the VGRF, at the interface between balance control mechanisms and sway of the CoP, can contribute information on how upright balance is maintained. Analysis of the frequency pattern of VGRF oscillations and its role in the maintenance of upright stance should complement the traditional measures of CoP excursions in the horizontal plane.
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Affiliation(s)
- Stefania Sozzi
- Istituti Clinici Scientifici Maugeri IRCCS, Centro Studi Attività Motorie (CSAM), Pavia, Italy
| | - Manh-Cuong Do
- Complexité, Innovation, Activités Motrices et Sportives (CIAMS), Université Paris-Saclay, Orsay, France
- Complexité, Innovation, Activités Motrices et Sportives (CIAMS), Université d'Orléans, Orléans, France
| | - Marco Schieppati
- Istituti Clinici Scientifici Maugeri IRCCS, Centro Studi Attività Motorie (CSAM), Pavia, Italy
- *Correspondence: Marco Schieppati ;
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Lee JJ, Park C, You J(SH. Effectiveness of a wearable ankle-tubing gait training on ankle kinematics and motor control in hemiparetic stroke. NeuroRehabilitation 2022; 51:123-132. [DOI: 10.3233/nre-210277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: While excessive ankle plantarflexion is a common neuromuscular impairment resulting from insufficient coordination of selective ankle neuromotor control and kinematics during gait. We recently developed a wearable, inexpensive and sustainable wearable ankle-tubing gait training (WAGT) aimed at improving selective ankle motor control and kinematic coordination. OBJECTIVE: We investigated the effects of WAGT on tibialis anterior (TA) and gastrocnemius (GCM) muscle electromyography (EMG) activity, TA: GCM muscle imbalance ratio, and ankle joint kinematics during gait in hemiparetic stroke patients. METHODS: A convenience sample of 33 participants (15 non-stroke healthy adults and 18 hemiparetic stroke patients) underwent standardized electromyography and kinematic biomechanical tests under conventional gait training (CGT) and WAGT conditions. Analysis of variance (ANOVA) was used to determine the significance of differences in the TA: GCM muscle activation, muscle imbalance ratio, and ankle joint kinematics before and after the intervention and between the two groups at P < 0.05. RESULTS: WAGT was more effective than CGT in improving TA muscle activation (P < 0.01), TA: GCM muscle imbalance ratio (P < 0.01), and kinematic movement (P < 0.01) in adults with or without hemiparetic stroke. CONCLUSIONS: This study demonstrated that WAGT is relatively ease to design, wear and affordable to most clinicians and patients, hence it is suitable for many health care applications to correct gait-related movement abnormalities presented in the hemiparetic stroke patients.
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Affiliation(s)
- Jeong Jae Lee
- Rehabilitation Team, Myongji Hospital, Goyang, Republic of Korea
- Sports Movement Artificial-Intelligence Robotics Technology (SMART) Institute, Department of Physical Therapy, Yonsei University, Wonju, Republic of Korea
- Department of Physical Therapy, Yonsei University, Wonju, Republic of Korea
| | - Chanhee Park
- Sports Movement Artificial-Intelligence Robotics Technology (SMART) Institute, Department of Physical Therapy, Yonsei University, Wonju, Republic of Korea
- Department of Physical Therapy, Yonsei University, Wonju, Republic of Korea
| | - Joshua (Sung) H. You
- Sports Movement Artificial-Intelligence Robotics Technology (SMART) Institute, Department of Physical Therapy, Yonsei University, Wonju, Republic of Korea
- Department of Physical Therapy, Yonsei University, Wonju, Republic of Korea
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Scarano S, Sansone VA, Ferrari Aggradi CR, Carraro E, Tesio L, Amadei M, Rota V, Zanolini A, Caronni A. Balance impairment in myotonic dystrophy type 1: Dynamic posturography suggests the coexistence of a proprioceptive and vestibular deficit. Front Hum Neurosci 2022; 16:925299. [PMID: 35967003 PMCID: PMC9367988 DOI: 10.3389/fnhum.2022.925299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/13/2022] [Indexed: 11/25/2022] Open
Abstract
Falls are frequent in Myotonic Dystrophy type 1 (DM1), but the pathophysiology of the balance impairment needs further exploration in this disease. The current work aims to provide a richer understanding of DM1 imbalance. Standing balance in 16 patients and 40 controls was tested in two posturographic tests (EquiTest™). In the Sensory Organization Test (SOT), standstill balance was challenged by combining visual (eyes open vs. closed) and environmental conditions (fixed vs. sway-tuned platform and/or visual surround). In the “react” test, reflexes induced by sudden shifts in the support base were studied. Oscillations of the body centre of mass (COM) were measured. In the SOT, COM sway was larger in patients than controls in any condition, including firm support with eyes open (quiet standing). On sway-tuned support, COM oscillations when standing with closed eyes were larger in patients than controls even after taking into account the oscillations with eyes open. In the “react” paradigm, balance reflexes were delayed in patients. Results in both experimental paradigms (i.e., SOT and react test) are consistent with leg muscle weakness. This, however, is not a sufficient explanation. The SOT test highlighted that patients rely on vision more than controls to maintain static balance. Consistently enough, evidence is provided that an impairment of proprioceptive and vestibular systems contributes to falls in DM1. Rehabilitation programs targeted at reweighting sensory systems may be designed to improve safe mobility in DM1.
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Affiliation(s)
- Stefano Scarano
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
- Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Ospedale San Luca, Milan, Italy
| | - Valeria Ada Sansone
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
- NEuroMuscular Omnicentre, Fondazione Serena Onlus, Milan, Italy
| | | | - Elena Carraro
- NEuroMuscular Omnicentre, Fondazione Serena Onlus, Milan, Italy
| | - Luigi Tesio
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
- Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Ospedale San Luca, Milan, Italy
| | - Maurizio Amadei
- Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Ospedale San Luca, Milan, Italy
| | - Viviana Rota
- Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Ospedale San Luca, Milan, Italy
| | - Alice Zanolini
- NEuroMuscular Omnicentre, Fondazione Serena Onlus, Milan, Italy
| | - Antonio Caronni
- Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Ospedale San Luca, Milan, Italy
- *Correspondence: Antonio Caronni,
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Sotirakis H, Patikas DA, Papaxanthis C, Hatzitaki V. Resilience of visually guided weight shifting to a proprioceptive perturbation depends on the complexity of the guidance stimulus. Gait Posture 2022; 95:22-29. [PMID: 35398706 DOI: 10.1016/j.gaitpost.2022.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 01/05/2022] [Accepted: 03/23/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Whole-body tracking of visual motion cues is used in balance training to improve weight shifting ability in old age and sports. RESEARCH QUESTION How tracking of a complex (pink noise) and a periodic visual target motion during anteroposterior weight shifting affects postural and muscle responses to unilateral hip vibration. METHODS Twenty-six participants performed 160 anteroposterior weight shifting cycles while tracking the vertical motion of a visual target, concurrently receiving Center of Pressure (CoP) feedback. They were randomly divided to groups; (a) the Constant group tracked a visual target motion constructed by 3 sinusoids of different amplitude, and (b) the Pink group tracked a complex visual target motion constructed by a pink noise generation process. Between the 60th and the 120th cycle, vibration was applied to the right gluteus medius, introducing a sideways CoP deviation. CoP displacement and electromyographic (EMG) responses of soleus, tibialis anterior and peroneus longus were recorded and summarized in blocks of 3 cycles. RESULTS Sideways CoP deviation induced at the onset/offset of unilateral hip vibration was smaller for the Pink than the Constant group. The Pink group demonstrated greater tibialis anterior and peroneus longus EMG activity around the most anterior sway peak while soleus EMG was similar for the two groups. Both groups successfully coupled weight shifting amplitude to the target motion, but the Pink group tracked the target motion with a greater delay compared to the Constant group. SIGNIFICANCE Whole body tracking of complex visual motions evokes perception-based action and increases ankle muscle co-activation making sway more resilient to a proprioceptive perturbation induced by unilateral hip vibration. Complex visual guidance motions should be considered when designing balance rehabilitation regimes, aiming at improving weight shifting ability and dynamic balance control.
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Affiliation(s)
- Haralampos Sotirakis
- Department of Physical Education and Sport Sciences, Aristotle University of Thessaloniki, Thessaloniki 54006, Greece
| | - Dimitrios A Patikas
- Department of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, Serres 62110, Greece
| | - Charalampos Papaxanthis
- INSERM U1093-CAPS, UFR des Sciences du Sport, Université Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Vassilia Hatzitaki
- Department of Physical Education and Sport Sciences, Aristotle University of Thessaloniki, Thessaloniki 54006, Greece.
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Towards defining biomarkers to evaluate concussions using virtual reality and a moving platform (BioVRSea). Sci Rep 2022; 12:8996. [PMID: 35637235 PMCID: PMC9151646 DOI: 10.1038/s41598-022-12822-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 05/16/2022] [Indexed: 11/17/2022] Open
Abstract
Current diagnosis of concussion relies on self-reported symptoms and medical records rather than objective biomarkers. This work uses a novel measurement setup called BioVRSea to quantify concussion status. The paradigm is based on brain and muscle signals (EEG, EMG), heart rate and center of pressure (CoP) measurements during a postural control task triggered by a moving platform and a virtual reality environment. Measurements were performed on 54 professional athletes who self-reported their history of concussion or non-concussion. Both groups completed a concussion symptom scale (SCAT5) before the measurement. We analyzed biosignals and CoP parameters before and after the platform movements, to compare the net response of individual postural control. The results showed that BioVRSea discriminated between the concussion and non-concussion groups. Particularly, EEG power spectral density in delta and theta bands showed significant changes in the concussion group and right soleus median frequency from the EMG signal differentiated concussed individuals with balance problems from the other groups. Anterior–posterior CoP frequency-based parameters discriminated concussed individuals with balance problems. Finally, we used machine learning to classify concussion and non-concussion, demonstrating that combining SCAT5 and BioVRSea parameters gives an accuracy up to 95.5%. This study is a step towards quantitative assessment of concussion.
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Winter L, Huang Q, Sertic JVL, Konczak J. The Effectiveness of Proprioceptive Training for Improving Motor Performance and Motor Dysfunction: A Systematic Review. FRONTIERS IN REHABILITATION SCIENCES 2022; 3:830166. [PMID: 36188962 PMCID: PMC9397687 DOI: 10.3389/fresc.2022.830166] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 03/14/2022] [Indexed: 01/13/2023]
Abstract
Objective Proprioceptive training is any intervention aiming to improve proprioceptive function with the ultimate goal to enhance motor function and performance. It has been promoted as an approach to enhance athletic performance and as a tool for sensorimotor rehabilitation. Numerous studies sought to provide evidence on the effectiveness of the approach. However, many different training regimes claiming to train proprioception report a variety of sensorimotor measures that are not directly comparable. This, in turn, makes it difficult to assess effectiveness across approaches. It is the objective of this study to systematically review recent empirical evidence to gain an understanding of which outcome measures are most sensitive, which populations may benefit most from proprioceptive training, and what are the effects on proprioceptive and motor systems. Methods Four major databases were searched. The following inclusion criteria were applied: (1) A quantified pre- and post-treatment measure of proprioceptive function. (2) An intervention or training program believed to influence or enhance proprioceptive function. (3) Contained at least one form of treatment or outcome measure that is indicative of somatosensory function and not confounded by information from other sensory modalities. 4) The study reported of at least one quantified measure of motor performance. Results Of the 3,297 articles identified by the database search, 70 studies met the inclusion criteria and were included for further review. Across studies, proprioceptive training led to comparable gains in both proprioceptive (+46%) and motor performance (+45%). The majority of studies (50/70) applied active movement interventions. Interventions applying somatosensory stimulation were most successful in clinical populations. Joint position sense error (JPSE) was the most commonly used proprioceptive measure and presents a reliable and feasible measure for clinical use. Conclusion Proprioceptive training can lead to significant improvements in proprioceptive and motor function across a range healthy and clinical populations. Regimens requiring active movement of the trainee tended to be most successful in improving sensorimotor performance. Conclusive evidence on how long training gains are retained is still lacking. There is no solid evidence about the underlying long-term neuroplastic changes associated proprioceptive training.
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Affiliation(s)
- Leoni Winter
- Human Sensorimotor Control Laboratory, School of Kinesiology, University of Minnesota, Minneapolis, MN, United States
- Center for Clinical Movement Science, University of Minnesota, Minneapolis, MN, United States
- *Correspondence: Leoni Winter
| | - Qiyin Huang
- Human Sensorimotor Control Laboratory, School of Kinesiology, University of Minnesota, Minneapolis, MN, United States
- Center for Clinical Movement Science, University of Minnesota, Minneapolis, MN, United States
| | - Jacquelyn V. L. Sertic
- Human Sensorimotor Control Laboratory, School of Kinesiology, University of Minnesota, Minneapolis, MN, United States
- Center for Clinical Movement Science, University of Minnesota, Minneapolis, MN, United States
| | - Jürgen Konczak
- Human Sensorimotor Control Laboratory, School of Kinesiology, University of Minnesota, Minneapolis, MN, United States
- Center for Clinical Movement Science, University of Minnesota, Minneapolis, MN, United States
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Yamada-Yanagawa A, Sasagawa S, Nakazawa K, Ishii N. Effects of Occasional and Habitual Wearing of High-Heeled Shoes on Static Balance in Young Women. Front Sports Act Living 2022; 4:760991. [PMID: 35434618 PMCID: PMC9006774 DOI: 10.3389/fspor.2022.760991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
The purpose of this study was to examine the effects of occasional and habitual wearing of high-heeled shoes on static balance in young women. Groups of habitual high-heel wearers and non-wearers (n = 7 in both groups) were asked to stand quietly on a force platform without shoes (WS condition) or with high heels (heel area 1 cm2, heel height 7 cm) (HH condition). During the trials, the center-of-pressure (CoP) position in the anterior-posterior direction was measured, and its root mean square (as a measure of postural sway magnitude, CoPRMS) and mean velocity (as a measure of regulatory activity, CoPMV) were calculated. To further examine the effect of high-heel wearing on the temporal aspects of slow and fast processes in static balance, the CoP sway was decomposed into low- (below 0.5 Hz) and high- (above 0.5 Hz) frequency components, and then spectral analysis was performed. Results showed that the CoPRMS was not significantly different between the groups or between the shoe conditions, indicating that wearing high heels with a heel height of 7 cm did not increase the magnitude of postural sway, irrespective of high-heel experience. The CoPMV was significantly larger in the HH condition than in the WS condition, whereas it was not significantly different between the groups. This result indicates that wearing high heels increased the amount of regulatory activity in both habitual wearers and non-wearers. The spectral analysis further showed that habitual high-heel wearers showed significantly decreased rate of regulatory activity than non-wearers, both while standing with and without high heels. These results suggest that use-dependent changes in static balance control are evident in both high-heeled and without shoes conditions.
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Affiliation(s)
- Ayano Yamada-Yanagawa
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Shun Sasagawa
- Department of Human Sciences, Kanagawa University, Yokohama, Japan
- *Correspondence: Shun Sasagawa
| | - Kimitaka Nakazawa
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Naokata Ishii
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
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Terada M, Kosik KB, McCann RS, Drinkard C, Gribble PA. Corticospinal activity during a single-leg stance in people with chronic ankle instability. JOURNAL OF SPORT AND HEALTH SCIENCE 2022; 11:58-66. [PMID: 32866712 PMCID: PMC8847849 DOI: 10.1016/j.jshs.2020.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/22/2020] [Accepted: 07/22/2020] [Indexed: 05/25/2023]
Abstract
PURPOSE The aim of the study was to determine whether corticospinal excitability and inhibition of the tibialis anterior during single-leg standing differs among individuals with chronic ankle instability (CAI), lateral ankle sprain copers, and healthy controls. METHODS Twenty-three participants with CAI, 23 lateral ankle sprain copers, and 24 healthy control participants volunteered. Active motor threshold (AMT), normalized motor-evoked potential (MEP), and cortical silent period (CSP) were evaluated by transcranial magnetic stimulation while participants performed a single-leg standing task. RESULTS Participants with CAI had significantly longer CSP at 100% of AMT and lower normalized MEP at 120% of AMT compared to lateral ankle sprain copers (CSP100%: p = 0.003; MEP120%: p = 0.044) and controls (CSP100%: p = 0.041; MEP120%: p = 0.006). CONCLUSION This investigation demonstrate altered corticospinal excitability and inhibition of the tibialis anterior during single-leg standing in participants with CAI. Further research is needed to examine the effects of corticospinal maladaptations to motor control of the tibial anterior on postural control performance in those with CAI.
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Affiliation(s)
- Masafumi Terada
- College of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
| | - Kyle B Kosik
- Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, KY 40536-0200, USA
| | - Ryan S McCann
- School of Rehabilitation Sciences, Old Dominion University, Norfolk, VA 23529, USA
| | | | - Phillip A Gribble
- Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, KY 40536-0200, USA
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Casal MZ, Peyré-Tartaruga LA, Zanardi APJ, Ivaniski-Mello A, Alves LDL, Haas AN, Martinez FG. Postural Adjustments and Biomechanics During Gait Initiation and Obstacle Negotiation: A Comparison Between Akinetic-Rigid and Hyperkinetic Parkinson's Disease. Front Physiol 2021; 12:723628. [PMID: 34803726 PMCID: PMC8600270 DOI: 10.3389/fphys.2021.723628] [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] [Received: 06/11/2021] [Accepted: 10/12/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Individuals with Parkinson's disease (PD) exhibit different combinations of motor symptoms. The most frequent subtypes are akinetic-rigid (AK-R) and hyperkinetic (HYP). Motor symptoms, such as rigidity and bradykinesia, can directly affect postural adjustments and performance in daily tasks, like gait initiation and obstacles negotiation, increasing the risk of falls and functional dependence. Objective: To compare postural adjustments and biomechanical parameters during the gait initiation and obstacle negotiation of people with AK-R and HYP PD and correlate with functional mobility and risk of falls. Methods: Cross-sectional study. Thirty-three volunteers with PD were divided into two groups according to clinical motor manifestations: AK-R (n = 16) and HYP (n = 17). We assessed the anticipatory (APA), compensatory (CPA) postural adjustments analyzing kinematic, kinetic and, electromyographic parameters during the gait initiation and obstacle negotiation tests. We applied independent T-tests and Pearson correlation tests for comparisons and correlations, respectively (α = 0.05). Results: In the APA phase of the gait initiation test, compared to the functional HYP group, the AK-R group showed shorter time for single support (p = 0.01), longer time for double support (p = 0.01) accompanied by a smaller first step (size, p = 0.05; height, p = 0.04), and reduced muscle activation of obliquus internus (p = 0.02). Similarly, during the first step in the obstacle negotiation test, the AK-R group showed less step height (p = 0.01) and hip excursion (p = 0.02), accompanied by a reduced mediolateral displacement of the center of pressure (p = 0.02) during APA, and activation of the gluteus medius (p = 0.02) and the anterior tibialis (p = 0.04) during CPA in comparison with HYP group. Conclusion: The findings suggest that people with AK-R present impaired postural adjustments during gait initiation and obstacles negotiation compared to hyperkinetic PD. Based on defined motor symptoms, the proposition presented here revealed consistent postural adjustments during complex tasks and, therefore, may offer new insights onto PD motor evaluation and neurorehabilitation.
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Affiliation(s)
- Marcela Zimmermann Casal
- Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | | | | | - André Ivaniski-Mello
- Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Lucas de Liz Alves
- Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Aline Nogueira Haas
- Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Flávia Gomes Martinez
- Exercise Research Laboratory, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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Paillard T. Sensory electrical stimulation and postural balance: a comprehensive review. Eur J Appl Physiol 2021; 121:3261-3281. [PMID: 34351530 DOI: 10.1007/s00421-021-04767-5] [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: 05/04/2021] [Accepted: 07/08/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE Sensory electrical stimulation (SES)-i.e., low-intensity electrical currents below, at, or just above the sensory threshold but below the motor threshold-is mainly used to restore/improve postural balance in pathological and healthy subjects. However, the ins and outs of its application as well as the neurophysiological effects induced are not yet well known. Hence, the aim of this paper was to address the effects of SES on postural balance based on these considerations. METHOD The immediate/concurrent effects (SES applied during postural balance measurements), the acute effects (SES durably applied before measuring postural balance) and the chronic effects (SES included in training/rehabilitation programs, i.e., measurements performed before and after the programs) were analysed with a comprehensive review. RESULT SES can lead to the improvement of postural balance using any of the three applications (immediate/concurrent, acute and chronic), notably in pathological subjects. The beneficial effects of SES can take place at the peripheral (sensory receptors sensitivity), spinal (spinal motoneural excitablity) and supra-spinal (cortex reorganisation or adaptation) levels. In healthy subjects, SES appears interesting, but too few studies have been conducted with this population to report clear results. Moreover, the literature is relatively devoid of comparative studies about the characteristics of the stimulation current (e.g., location, current parameters, duration). CONCLUSION In practice, SES appears to be particularly useful to reinforce or restore the postural function in the immediate/concurrent, acute or chronic application in pathlogical populations while its effects should be confirmed in healthy sujects by future studies. Moreover, future research should focus on the different characteristics of stimulation.
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Affiliation(s)
- Thierry Paillard
- Laboratoire Mouvement, Equilibre, Performance et Santé, EA 4445, Département STAPS, Université de Pau et des Pays de L'Adour/E2S, ZA Bastillac Sud, 65000, Tarbes, France.
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Maintenance of standing posture during multi-directional leaning demands the recruitment of task-specific motor units in the ankle plantarflexors. Exp Brain Res 2021; 239:2569-2581. [PMID: 34191118 DOI: 10.1007/s00221-021-06154-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/12/2021] [Indexed: 10/21/2022]
Abstract
The purpose of this study is to investigate whether regional modulation of the ankle plantarflexors during standing was related to the recruitment of motor units associated with force direction. Fourteen participants performed a multi-directional leaning task in standing. Participants stood on a force platform and maintained their center of pressure in five different target directions. Motor unit firings were extracted by decomposition of high-density surface electromyograms recorded from the ankle plantarflexor muscles. The motor unit barycentre, defined as the weighted mean of the maximal average rectified values across columns and rows, was used to evaluate the medio-lateral and proximo-distal changes in the surface representation of single motor units across different leaning target directions. Using a motor unit tracking analysis, groups of motor units were identified as being common or unique across the target directions. The leaning directions had an effect on the spatial representations of motor units in the medial gastrocnemius and soleus (p < 0.05), but not in the lateral gastrocnemius (p > 0.05). Motor unit action potentials were represented in the medial and proximal aspects of the muscles during forward vs. lateral leans. Further analysis determined that the common motor units were found in similar spatial locations across the target directions, whereas newly recruited unique motor units were found in different spatial locations according to target direction (p < 0.05). The central nervous system may possess the ability to activate different groups of motor units according to task demands to meet the force-direction requirements of the leaning task.
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Hefter H, Nickels W, Samadzadeh S, Rosenthal D. Comparing soleus injections and gastrocnemius injections of botulinum toxin for treating adult spastic foot drop: a monocentric observational study. J Int Med Res 2021; 49:300060521998208. [PMID: 33784844 PMCID: PMC8020232 DOI: 10.1177/0300060521998208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Objective Outcome differences between selective abobotulinumtoxin type A (aboBoNT/A)
injections into the soleus (SOL) and gastrocnemius (GAS) muscles were
investigated in post-stroke patients with spastic foot drop. Methods A monocentric observational study was conducted at a university hospital
botulinum toxin clinic including 24 free-walking adult, botulinum
toxin-naive patients with post-stroke hemiplegia. AboBoNT/A (800 MU in 4 mL
saline) was injected into the SOL or GAS muscle under electromyographic
guidance. After 30 days post-injection, the effect of aboBoNT/A injection
was assessed by patients. The treating physician scored spasticity and
measured angles at the knee and ankle joint and gait speed. Results After 30 days, significant improvements of subjective and objective outcome
measures were observed. No significant difference was observed in the
modified Ashworth scale, gait speed, ankle and knee angles, or their angle
combinations between the SOL and GAS groups. Tendencies toward greater
active range of motion (RoM) improvement in the SOL group and passive RoM
improvement in the GAS group were observed. The difference between active
and passive ankle extensions plus knee flexions was significantly larger in
the SOL group. Conclusions Selective 800 MU aboBoNT/A injections into the SOL or GAS muscle were
effective but without relevant clinical difference.
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Affiliation(s)
- Harald Hefter
- Department of Neurology, University of Düsseldorf, Düsseldorf, Germany
| | - Werner Nickels
- Department of Neurology, SRH Health Center, Bad Wimpfen, Germany
| | - Sara Samadzadeh
- Department of Neurology, University of Düsseldorf, Düsseldorf, Germany
| | - Dietmar Rosenthal
- Department of Neurology, University of Düsseldorf, Düsseldorf, Germany
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Alahmari KA, Kakaraparthi VN, Reddy RS, Silvian P, Tedla JS, Rengaramanujam K, Ahmad I. Combined Effects of Strengthening and Proprioceptive Training on Stability, Balance, and Proprioception Among Subjects with Chronic Ankle Instability in Different Age Groups: Evaluation of Clinical Outcome Measures. Indian J Orthop 2021; 55:199-208. [PMID: 34122771 PMCID: PMC8149549 DOI: 10.1007/s43465-020-00192-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND Lateral ankle sprains are among the common injuries in the physically active population in different age groups and progress to chronic ankle instability (CAI). Accordingly, the current study assesses the effectiveness of strengthening and proprioceptive training programs on proprioception and balance in those suffering from CAI. DESIGN Quasi-experimental design. METHODS Thirty-six individuals with self-reported CAI were assigned into three groups based on age: group 1 (23 ± 1.84), group 2 (35.80 ± 1.68), group 3 (44.25 ± 4.86), then performed strength and balance exercises for 6 weeks. The study furthermore measured pre- and post-training of joint position sense (JPS), static balance, dynamic balance, chronic ankle instability tool (CAIT) and lower extremity functional scale (LEFS). RESULTS Statistical analysis showed significant improvement (P < 0.01) on all outcome measures among all groups. In group 1, mainly the plantar flexion JPS improved to 3.7°, while in group 2 and group 3 the eversion JPS improved to 3.1° and 1.78° (P < 0.01). With reference to static balance with one's eyes closed and eyes open, the improvement in group 1 was 4.46, 11.05 s, group 2 was 2.23, 7.85 s and group 3 was 1.69, 4.68 s. In relation to dynamic balance, the development in group 1 was 5.85 cm, while group 2 was 4.71 cm and group 3 was 2.49 cm. Moreover, both CAIT and LEFS showed significant differences (P < 0.01) after training. CONCLUSION This study found that combined strengthening and proprioceptive training effectively improves stability, proprioception, balance, and self-reported functional outcomes.
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Affiliation(s)
- Khalid A Alahmari
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
| | - Venkata Nagaraj Kakaraparthi
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
| | - Ravi Shankar Reddy
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
| | - Paul Silvian
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
| | - Jaya Shanker Tedla
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
| | - Kanagaraj Rengaramanujam
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
| | - Irshad Ahmad
- C/3/139, Department of Medical Rehabilitation (Physical Therapy), College of Applied Medical Sciences, King Khalid University, Guraiger Campus, Abha, Kingdom of Saudi Arabia
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Hill MW, Roberts M, Price MJ, Kay AD. Association between knee extensor and ankle plantarflexor muscle thickness and echo intensity with postural sway, mobility and physical function in older adults. Exp Gerontol 2021; 150:111385. [PMID: 33932562 DOI: 10.1016/j.exger.2021.111385] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 04/12/2021] [Accepted: 04/27/2021] [Indexed: 02/07/2023]
Abstract
The purpose of this study was to assess the association between muscle thickness and echo intensity of the knee extensors and ankle plantarflexors with postural sway, mobility and physical function in older adults. Twenty-one older men and women (age; 69.9 ± 4.3 years) were assessed for postural sway (centre of pressure movement), mobility (i.e. Timed-Up and-Go-test [TUG]), physical function (i.e. 5 times sit-to-stand [STS]), and ultrasound derived measures of muscle thickness and echo intensity of the vastus lateralis (VL) and gastrocnemius medialis (GM). Significant inverse correlations were observed between VL and GM thickness with TUG (r = -0.432 to -0.492) and STS (r = -0.473 to -0.596). Significant positive correlations were observed between VL and GM echo intensity with TUG (r = 0.459 to 0.518) and STS (r = 0.481 to 0.635). Significant positive correlations were also detected between GM echo intensity and anteroposterior sway (r = 0.451 to 0.534). Two key findings emerged from the present experiment. First, this study provides novel evidence that ankle plantarflexor echo intensity, but not thickness, was associated with anteroposterior postural sway among older adults. Second, we provide new evidence that muscle thickness and echo intensity of the knee extensors and uniquely, the ankle plantarflexors, presented with similar magnitude associations with TUG and STS performance in older adults.
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Affiliation(s)
- Mathew William Hill
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, Warwickshire, United Kingdom.
| | - Matthew Roberts
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, Warwickshire, United Kingdom
| | - Michael James Price
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, Warwickshire, United Kingdom
| | - Anthony David Kay
- Centre for Physical Activity and Life Sciences, Faculty of Art, Science and Technology, University of Northampton, Northamptonshire, United Kingdom
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Standing on unstable surface challenges postural control of tracking tasks and modulates neuromuscular adjustments specific to task complexity. Sci Rep 2021; 11:6122. [PMID: 33731729 PMCID: PMC7969732 DOI: 10.1038/s41598-021-84899-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 02/22/2021] [Indexed: 01/31/2023] Open
Abstract
Understanding the modulations of motor control in the presence of perturbations in task conditions of varying complexity is a key element towards the design of effective perturbation-based balance exercise programs. In this study we investigated the effect of mechanical perturbations, induced by an unstable surface, on muscle activation and visuo-postural coupling, when actively tracking target motion cues of different complexity. Four postural tasks following a visual oscillating target of varying target complexity (periodic-sinusoidal vs. chaotic-Lorenz) and surface (stable-floor vs. unstable-foam) were performed. The electromyographic activity of the main plantarflexor and dorsiflexor muscles was captured. The coupling between sway and target was assessed through spectral analysis and the system's local dynamic stability through the short-term maximum Lyapunov exponent. We found that external perturbations increased local instability and deteriorated visuo-motor coupling. Visuo-motor deterioration was greater for the chaotic target, implying that the effect of the induced perturbations depends on target complexity. There was a modulation of the neuromotor system towards amplification of muscle activity and coactivation to compensate surface-related perturbations and to ensure robust motor control. Our findings provide evidence that, in the presence of perturbations, target complexity induces specific modulations in the neuromotor system while controlling balance and posture.
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Park JH, Rhyu HS, Rhi SY. The effects of instrument-assisted soft tissue mobilization rehabilitation exercise on range of motion, isokinetic strength, and balance in chronic ankle instability taekwondo players. J Exerc Rehabil 2020; 16:516-521. [PMID: 33457388 PMCID: PMC7788247 DOI: 10.12965/jer.2040752.376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 11/24/2020] [Indexed: 11/22/2022] Open
Abstract
We aimed to investigate change the instrument-assisted soft tissue mobilization (IASTM) rehabilitation exercise on range of motion (ROM), isokinetic ankle strength, and balance. We included 20 elite taekwondo players (chronic ankle instability) in Korea. They were divided into the IASTM group (n=10), control group (n=10). IASTM group were exercised with IASTM rehabilitation exercise four times per week for 8 weeks. The remaining control group did not receive exercise intervention between tests and served as the control. A goniometer was used to measure dorsi-flexion (D/F), plantar-flexion (P/F), a dynamometer was used to measure ankle isokinetic strength, and plantar foot pressure was used to measure static balance. The data were analyzed using repeated-measures analysis of variance. Significant differences were observed between the two groups in IASTM group and control group: ROM (right P/F, P<0.001; right D/F, P<0.01; left P/F, P<0.000; left D/F, P<0.000), isokinetic strength (right P/F 60°, P<0.000; right D/F 60°, P<0.000; left P/F 60°, P<0.000; left D/F 60°, P<0.000; right P/F 180°, P<0.000; right D/F 180°, P<0.000; left: P/F 180°, P<0.000, left D/F 180°, P<0.000), and balance test (static eye open, P<0.000; static eye close, P<0.000; postural stability, P<0.041). These results suggest that IASTM rehabilitation exercise improves ankle stability, muscle power, and body balance in chronic ankle instability taekwondo players.
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Affiliation(s)
- Jong-Hoon Park
- Department of Sports & Health Management, Catholic Kwandong University, Gangnung, Korea
| | - Hyun-Seung Rhyu
- Department of Physical Education, Jungwon University, Goesan, Korea
| | - Soung-Yob Rhi
- Department of Sports & Health Management, Catholic Kwandong University, Gangnung, Korea
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Matsugi A, Oku K, Mori N. The Effects of Stochastic Galvanic Vestibular Stimulation on Body Sway and Muscle Activity. Front Hum Neurosci 2020; 14:591671. [PMID: 33381017 PMCID: PMC7767904 DOI: 10.3389/fnhum.2020.591671] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 11/18/2020] [Indexed: 12/23/2022] Open
Abstract
Objective: This study aimed to investigate whether galvanic vestibular stimulation with stochastic noise (nGVS) modulates the body sway and muscle activity of the lower limbs, depending on visual and somatosensory information from the foot using rubber-foam. Methods: Seventeen healthy young adults participated in the study. Each subject maintained an upright standing position on a force plate with/without rubber-foam, with their eyes open/closed, to measure the position of their foot center of pressure. Thirty minutes after baseline measurements under four possible conditions (eyes open/closed with/without rubber-foam) performed without nGVS (intensity: 1 mA, duration: 40 s), the stimulation trials (sham-nGVS/real-nGVS) were conducted under the same conditions in random order, which were then repeated a week or more later. The total center of pressure (COP) path length movement (COP-TL) and COP movement velocity in the mediolateral (Vel-ML) and anteroposterior (Vel-AP) directions were recorded for 30 s during nGVS. Furthermore, electromyography activity of the right tibial anterior muscle and soleus muscle was recorded for the same time and analyzed. Results: Three-way analysis of variance and post-hoc multiple comparison revealed a significant increment in COP-related parameters by nGVS, and a significant increment in soleus muscle activity on rubber. There was no significant effect of eye condition on any parameter. Conclusions: During nGVS (1 mA), body sway and muscle activity in the lower limb may be increased depending not on the visual condition, but on the foot somatosensory condition.
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Affiliation(s)
- Akiyoshi Matsugi
- Faculty of Rehabilitation, Shijonawate Gakuen University, Daitou, Japan
| | - Kosuke Oku
- Department of Rehabilitation, Kawasaki University of Medical Welfare, Kurashiki, Japan
| | - Nobuhiko Mori
- Department of Neuromodulation and Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, Japan.,Department of Neurosurgery, Osaka University Graduate School of Medicine, Osaka, Japan
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Reynolds RF, Smith CP, Yang R, Griffin R, Dunn A, McAllister C. Effects of calf muscle conditioning upon ankle proprioception. PLoS One 2020; 15:e0236731. [PMID: 32866151 PMCID: PMC7458279 DOI: 10.1371/journal.pone.0236731] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 07/11/2020] [Indexed: 11/26/2022] Open
Abstract
Ankle proprioception is crucial for balance and relies upon accurate input from calf muscle spindles. Spindle input, in turn, depends upon the physiological and mechanical properties of surrounding muscle tissue. Altering these properties could affect ankle proprioception, with potential consequences for balance. Here we determine the effects of prior muscle cooling, stretch and contraction upon performance of a contralateral ankle joint matching task. Participants stood passively leaning against a board oriented 22° rearward from vertical. Their right ankle was rotated to a randomised position between ± 6° plantar/dorsiflexion. The task was to align the left ankle to the same position, without vision. In the first experiment, immediately prior to each testing session, participants either produced a strong calf muscle contraction in a fully plantarflexed (tiptoe) posture or underwent 15° dorsiflexion stretch. Contraction had no effect on task performance, whereas stretch produced a significant bias in ankle placement of 0.89 ± 0.6°, indicating that participants perceived their foot to be more plantarflexed compared to a control condition. In the second experiment, the right lower leg was cooled in iced water (≤ 5°C) for 10 minutes. Cooling increased joint matching error by ~0.4°, through a combination of increased bias and variability. These results confirm that conditioning the triceps surae muscles can alter perception of ankle joint position. Since body movement during quiet stance is in the order of 1°, the magnitude of these changes are relevant for balance.
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Affiliation(s)
- Raymond F. Reynolds
- The School of Sport, Exercise & Rehabilitation Sciences, The University of Birmingham, Birmingham, United Kingdom
- * E-mail:
| | - Craig P. Smith
- The School of Sport, Exercise & Rehabilitation Sciences, The University of Birmingham, Birmingham, United Kingdom
| | - Rufei Yang
- The School of Sport, Exercise & Rehabilitation Sciences, The University of Birmingham, Birmingham, United Kingdom
| | - Robert Griffin
- The School of Sport, Exercise & Rehabilitation Sciences, The University of Birmingham, Birmingham, United Kingdom
| | - Amanda Dunn
- The School of Sport, Exercise & Rehabilitation Sciences, The University of Birmingham, Birmingham, United Kingdom
| | - Craig McAllister
- The School of Sport, Exercise & Rehabilitation Sciences, The University of Birmingham, Birmingham, United Kingdom
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Yousefi M, Sadeghi H, Ilbiegi S, Ebrahimabadi Z, Kakavand M, Wikstrom EA. Center of pressure excursion and muscle activation during gait initiation in individuals with and without chronic ankle instability. J Biomech 2020; 108:109904. [PMID: 32636013 DOI: 10.1016/j.jbiomech.2020.109904] [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: 01/04/2020] [Revised: 05/28/2020] [Accepted: 06/14/2020] [Indexed: 11/30/2022]
Abstract
The aim of the current study was to determine differences in center of pressure (COP)excursion and muscle activation during gait initiation (GI) in those with and without chronic ankle instability (CAI). Thirty-four participants, 17 per group, volunteered to participate. Participants were asked to stand barefoot on a force plate before initiating gait upon hearing an auditory cue. Reaction time, anticipatory postural adjustment phase time, as well as normalized peak COP excursion during the anticipatory postural adjustment phase was calculated. Response time of Soleus and Tibialis Anterior muscles were concurrently recorded via electromyography. The results demonstrate a longer reaction time and shorter anticipatory postural adjustment phase time in the CAI group (p < 0.05). No significant between group differences in peak normalized COP excursion were noted (p > 0.05). Muscle onset patterns differed between groups as those with CAI demonstrated earlier Soleus activation compared to the control group (p < 0.05). The results suggest that those with CAI have an altered GI motor control strategy as evidenced by reduced or absent Soleus muscle inhibition during APA phase of GI relative to controls. The APA phase is controlled by the secondary motor area, therefore, the presence of motor control alterations in CAI patients may be due to a supra-spinal alterations.
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Affiliation(s)
- Mohammad Yousefi
- Sport Biomechanics, Faculty of Sport Sciences, University of Birjand, Birjand, Iran.
| | - Heydar Sadeghi
- Sport Biomechanics and injuries, Faculty of Physical Education & Sport Sciences, Kharazmi University of Tehran, Tehran, Iran; Kinsiology Research Center, Sport Biomechanics, Kharazmi University of Tehran, Tehran, Iran
| | - Saeed Ilbiegi
- Sport Biomechanics, Faculty of Sport Sciences, University of Birjand, Birjand, Iran
| | - Zahra Ebrahimabadi
- Department of Physiotherapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Kakavand
- Master of Sport Biomechanics, Faculty of Physical Education, Kharazmi University of Tehran, Tehran, Iran
| | - Erik A Wikstrom
- MOTION Science Institute &Department of Exercise & Sport Science University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
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Intrinsic foot muscles act to stabilise the foot when greater fluctuations in centre of pressure movement result from increased postural balance challenge. Gait Posture 2020; 79:229-233. [PMID: 32446178 DOI: 10.1016/j.gaitpost.2020.03.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 01/17/2020] [Accepted: 03/16/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Increased postural balance challenge is associated with more fluctuations in centre of pressure movement, indicating increased interference from the postural control system. The role of intrinsic foot muscles in balance control is relatively understudied and whether such control system interference occurs at the level of these muscles is unknown. RESEARCH QUESTION Do fewer fluctuations in intrinsic foot muscle excitation occur in response to increased postural balance challenge? METHODS Surface EMGs were recorded using a grid of 13 × 5 channels from the plantar surface of the foot of 17 participants, who completed three balance tasks: bipedal stance; single leg stance and bipedal tip-toe. Centre of pressure (CoP) movement was calculated from simultaneously recorded force plate signals. Fluctuations in CoP and EMGs for each task were quantified using a sample entropy based metric, Entropy Halflife (EnHL). Longer EnHL indicates fewer signal fluctuations. RESULTS The shortest EMG EnHL, 9.27 ± 3.34 ms (median ± interquartile range), occurred during bipedal stance and the longest during bipedal tip-toe 15.46 ± 11.16 ms, with 18.80 ± 8.00 ms recorded for single leg stance. Differences were statistically significant between bipedal stance and both bipedal tip-toe (p < 0.001) and single leg stance (p < 0.001). CoP EnHL for both anterior-posterior and medial-lateral movements also differed significantly between tasks (p < 0.001, both cases). However, anterior-posterior CoP EnHL was longest for bipedal stance 259.84±230.22 ms and shortest for bipedal tip-toe 146.25±73.35 ms. Medial-lateral CoP EnHL was also longest during bipedal stance 215.73±187.58 ms, but shortest for single leg stance 113.48±83.01 ms. SIGNIFICANCE Fewer fluctuations in intrinsic foot muscle excitation occur in response to increased postural balance challenge. Fluctuations in CoP movement during balance must be predominantly driven by excitation of muscles extrinsic to the foot. Intrinsic foot muscles therefore likely play a greater role in stabilisation of the foot than balance control during the postural tasks studied.
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Walsh GS, Low DC, Arkesteijn M. Stable and Unstable Load Carriage Effects on the Postural Control of Older Adults. J Appl Biomech 2020; 36:178-185. [PMID: 32369768 DOI: 10.1123/jab.2019-0366] [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: 11/19/2019] [Revised: 02/08/2020] [Accepted: 03/03/2020] [Indexed: 11/18/2022]
Abstract
The aim of this study was to investigate the effects of backpack load carriage on quiet standing postural control and limits of stability (LOS) of older adults. Fourteen older adults (65 [6] y) performed quiet standing and a forward, right, and left LOS test in 3 conditions, unloaded, stable, and unstable backpack loads while activity of 4 leg muscles was recorded. Stable and unstable loads decreased postural sway (main effect ηp2=.84, stable P < .001, unstable P < .001), mediolateral (main effect ηp2=.49, stable P = .002, unstable P = .018) and anterior-posterior (main effect ηp2=.64, stable P < .001, unstable P = .001) fractal dimension, and LOS distance (main effect ηp2=.18, stable P = .011, unstable P = .046) compared with unloaded. Rectus femoris (main effect ηp2=.39, stable P = .001, unstable P = .010) and gastrocnemius (main effect ηp2=.30, unstable P = .027) activity increased in loaded conditions during LOS and quiet standing. Gastrocnemius-tibialis anterior coactivation was greater in unstable load than stable loaded quiet standing (main effect ηp2=.24, P = .040). These findings suggest older adults adopt conservative postural control strategies minimizing the need for postural corrections in loaded conditions. Reduced LOS may also increase fall risk when carrying a load. However, there was no difference between unstable and stable loads for postural control variables.
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Wadsworth D, Lark S. Effects of Whole-Body Vibration Training on the Physical Function of the Frail Elderly: An Open, Randomized Controlled Trial. Arch Phys Med Rehabil 2020; 101:1111-1119. [PMID: 32145279 DOI: 10.1016/j.apmr.2020.02.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 01/28/2020] [Accepted: 02/21/2020] [Indexed: 01/10/2023]
Abstract
OBJECTIVE To investigate the feasibility and benefits of whole-body vibration (WBV) exercise as a safe and effective training tool for countering sarcopenia and age-related declines in mobility and function in the frail elderly. DESIGN An open, randomized controlled trial. SETTING Residential care facilities. PARTICIPANTS Male and female volunteers (N=117; 82.5±7.9y). INTERVENTIONS After prescreening for contraindications, participants were randomly allocated to a control, simulated WBV (SIM), or WBV exercise group. All participants received regular care, whereas WBV and SIM participants also underwent thrice-weekly exercise sessions for 16 weeks. Delivered by overload principle, WBV training began with 5 × 1-minute bouts at 6 Hz/2 mm (1:1 min exercise:rest), progressing to 10 × 1 minute at up to 26 Hz/4 mm, maintaining knee flexion. Training for SIM participants mimicked WBV exercise stance and duration only. MAIN OUTCOME MEASURES The timed Up and Go, Parallel Walk, and 10-m Timed Walk (10mTW) tests performance were assessed, in addition to the Barthel Index Questionnaire, at baseline, 8, and 16 weeks of exercise, and 3, 6, and 12 months postexercise. RESULTS High levels of compliance were reported in SIM (89%) and WBV training (93%), with ease of use and no adverse effects. In comparison to baseline levels, WBV training elicited clinically important treatment effects in all parameters compared to SIM and control groups. Treatment effects remained apparent up to 12 months postintervention for Parallel Walk Test and 6 months for 10mTW Test. Functional test performance declined during and postintervention in non-WBV groups. CONCLUSIONS Findings indicate that 16 weeks of low-level WBV exercise provides easily accessible, adequate stimulus for the frail elderly to attain improved levels of physical functionality.
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Affiliation(s)
- Daniel Wadsworth
- School of Sport & Exercise, Massey University, New Zealand; School of Nursing, Midwifery and Paramedicine, University of the Sunshine Coast, Australia.
| | - Sally Lark
- Sport and Exercise New Zealand, Christchurch, New Zealand
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Kadri MA, Chevalier G, Mecheri H, Ngomo S, Lavallière M, da Silva RA, Beaulieu LD. Time course and variability of tendinous vibration-induced postural reactions in forward and backward directions. J Electromyogr Kinesiol 2020; 51:102386. [PMID: 32014802 DOI: 10.1016/j.jelekin.2020.102386] [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] [Received: 09/18/2019] [Revised: 12/19/2019] [Accepted: 01/12/2020] [Indexed: 10/25/2022] Open
Abstract
Mechanical vibration of tendons induces large postural reactions (PR-VIB) but little is known about how these reactions vary within and between subjects. We investigated the intra- and inter-individual variability of PR-VIB and determined the reliability of center of pressure (COP) measures. Bipodal postural control (eyes closed) of 30 healthy adults were evaluated using a force platform under 02 conditions: bilateral VIB of the tibialis anterior (TA) and Achilles tendons (ACH-T) at 80 Hz. Each condition consisted of 03 trials of 30 s duration (Baseline: 10 s; VIB: 10 s; POST-VIB: 10 s). The Amplitude and Velocity of the COP in the antero-posterior/medio-lateral (AP/ML) directions were recorded and analyzed according to 5 time-windows incremented every 2 s of vibration (i.e. the first 2 s; 4 s; 6 s; 8 s & 10 s), whereas the COP position/AP was monitored every 0.5 s. All postural parameters increased significantly during TA and ACH-T vibration compared to the Baseline. The reliability of the COP measures showed good ICC scores (0.40-0.84) and measurement errors that varied depending on the duration of VIB time-windows. The COP position/AP reveals a lower intra- and inter-subject variability of PR-VIB in the first 2 s of VIB. The metrological characteristics of PR-VIB should be investigated further to guide their future use by clinicians and researchers.
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Affiliation(s)
- Mohamed Abdelhafid Kadri
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada.
| | - Gabrielle Chevalier
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada
| | - Hakim Mecheri
- IRSST, Institut de recherche Robert-Sauvé en santé et en sécurité de travail, Montréal, QC, Canada
| | - Suzy Ngomo
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada
| | - Martin Lavallière
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada
| | - Rubens A da Silva
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada
| | - Louis-David Beaulieu
- BioNR Research Lab, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada
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Effects of Ankle Angular Position and Standing Surface on Postural Control of Upright Stance. Motor Control 2020; 24:291-303. [PMID: 31972537 DOI: 10.1123/mc.2019-0079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/17/2019] [Accepted: 11/30/2019] [Indexed: 11/18/2022]
Abstract
The purpose of the study was to investigate the effects of ankle angular position and standing surface type on static upright balance. Ten young adults stood on a force platform or on a firm wedge that induced 15° of either dorsiflexion or plantarflexion. In addition, a piece of foam was placed on top of the force platform and on the wedge. The center of pressure distance and velocity in the anteroposterior and mediolateral directions were calculated. Significantly larger magnitudes in most of the investigated variables were seen while standing with ankles in the dorsiflexion when compared with standing with the ankle joints in a natural position (p < .05). Plantarflexion increased the center of pressure anteroposterior velocity by 87% when compared with a natural stance (p < .05). Standing on the foam surfaces resulted in increases in all of the center of pressure measures by an average of 38% in all of the ankle conditions.
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Uchiyama T, Kondo G. Relationships among Electromyogram, Displacement and Velocity of the Center of Pressure, and Muscle Stiffness of the Medial Gastrocnemius Muscle during Quiet Standing. ADVANCED BIOMEDICAL ENGINEERING 2020. [DOI: 10.14326/abe.9.138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Takanori Uchiyama
- Department of Applied Physics and Physico-Informatics, Faculty of Science and Technology, Keio University
| | - Gai Kondo
- Graduate School of Science and Technology, Keio University
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Hodson-Tole EF, Lai AKM. Ultrasound-derived changes in thickness of human ankle plantar flexor muscles during walking and running are not homogeneous along the muscle mid-belly region. Sci Rep 2019; 9:15090. [PMID: 31636320 PMCID: PMC6803718 DOI: 10.1038/s41598-019-51510-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 09/27/2019] [Indexed: 01/06/2023] Open
Abstract
Skeletal muscle thickness is a valuable indicator of several aspects of a muscle’s functional capabilities. We used computational analysis of ultrasound images, recorded from 10 humans walking and running at a range of speeds (0.7–5.0 m s−1), to quantify interactions in thickness change between three ankle plantar flexor muscles (soleus, medial and lateral gastrocnemius) and quantify thickness changes at multiple muscle sites within each image. Statistical analysis of thickness change as a function of stride cycle (1d statistical parametric mapping) revealed significant differences between soleus and both gastrocnemii across the whole stride cycle as they bulged within the shared anatomical space. Within each muscle, changes in thickness differed between measurement sites but not locomotor condition. For some of the stride, thickness measures taken from the distal-mid image region represented the mean muscle thickness, which may therefore be a reliable region for these measures. Assumptions that muscle thickness is constant during a task, often made in musculoskeletal models, do not hold for the muscles and locomotor conditions studied here and researchers should not assume that a single thickness measure, from one point of the stride cycle or a static image, represents muscle thickness during dynamic movements.
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Affiliation(s)
- E F Hodson-Tole
- Research Centre Musculoskeletal Science and Sports Medicine, Department of Life Sciences, Manchester Metropolitan University, Manchester, UK.
| | - A K M Lai
- Department Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, Canada
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Magalhães FH, Mello EM, Kohn AF. Association Between Plantarflexion Torque Variability In Quiet Stance And During Force And Position Tasks. Somatosens Mot Res 2019; 36:241-248. [PMID: 31583939 DOI: 10.1080/08990220.2019.1673720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
This study examined the association between plantarflexion torque variability during quiet bipedal standing (QS) and during plantarflexion force- and position-matching tasks (FT and PT, respectively). In QS, participants stood still over a force plate, and the mean plantarflexion torque level exerted by each subject in QS (divided by 2 to give the torque due to a single leg) served as the target torque level for right leg FT and PT (performed with the participants seated with their right knee fully extended). During FT participants controlled the force level exerted by the foot against a rigid restraint, while during PT they controlled the angular position of the ankle when sustaining equivalent inertial loads. Standard deviation (SD) of plantarflexion torque was computed from torque signals acquired during periods with and without visual feedback. Significant correlations were found between plantarflexion torque variability in QS and FT (r = 0.8615, p < 0.0001 and r = 0.8838, p = 0.0003 for visual and no visual conditions, respectively) as well as between QS and PT (r = 0.8046, p = 0.003 and r = 0.7332, p = 0.0103 for visual and no visual conditions, respectively), regardless of vision availability. No significant differences were found between the correlations for Qs vs FT and QS vs PT (t(8) = 0.4778, p = 0.6455 and t(8) = 1.6819, p = 0.1310 for visual and no visual conditions, respectively), as assessed by "Hotelling-Williams" tests for equality among dependent correlations. The results indicate that simple measurements of plantarflexion torque fluctuations during FT and PT may be used to estimate balance ability. From a practical standpoint, it is suggested that rehabilitation protocols designed to regain/improve balance function may be based on the performance of FTs or PTs executed in a seated position.
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Affiliation(s)
- Fernando Henrique Magalhães
- School of Arts, Sciences and Humanities, Universidade de São Paulo, EACH-USP, São Paulo, Brazil.,Biomedical Engineering Laboratory and Neuroscience Program, Universidade de São Paulo, EPUSP, PTC, São Paulo, Brazil
| | - Emanuele Moraes Mello
- Biomedical Engineering Laboratory and Neuroscience Program, Universidade de São Paulo, EPUSP, PTC, São Paulo, Brazil
| | - André Fabio Kohn
- Biomedical Engineering Laboratory and Neuroscience Program, Universidade de São Paulo, EPUSP, PTC, São Paulo, Brazil
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The Usefulness of an Alternative Diagnostic Method for Sarcopenia Using Thickness and Echo Intensity of Lower Leg Muscles in Older Males. J Am Med Dir Assoc 2019; 20:1185.e1-1185.e8. [DOI: 10.1016/j.jamda.2019.01.152] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/26/2019] [Accepted: 01/28/2019] [Indexed: 01/03/2023]
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Iyengar RS, Pithapuram MV, Singh AK, Raghavan M. Curated Model Development Using NEUROiD: A Web-Based NEUROmotor Integration and Design Platform. Front Neuroinform 2019; 13:56. [PMID: 31440153 PMCID: PMC6693358 DOI: 10.3389/fninf.2019.00056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 07/11/2019] [Indexed: 11/24/2022] Open
Abstract
Decades of research on neuromotor circuits and systems has provided valuable information on neuronal control of movement. Computational models of several elements of the neuromotor system have been developed at various scales, from sub-cellular to system. While several small models abound, their structured integration is the key to building larger and more biologically realistic models which can predict the behavior of the system in different scenarios. This effort calls for integration of elements across neuroscience and musculoskeletal biomechanics. There is also a need for development of methods and tools for structured integration that yield larger in silico models demonstrating a set of desired system responses. We take a small step in this direction with the NEUROmotor integration and Design (NEUROiD) platform. NEUROiD helps integrate results from motor systems anatomy, physiology, and biomechanics into an integrated neuromotor system model. Simulation and visualization of the model across multiple scales is supported. Standard electrophysiological operations such as slicing, current injection, recording of membrane potential, and local field potential are part of NEUROiD. The platform allows traceability of model parameters to primary literature. We illustrate the power and utility of NEUROiD by building a simple ankle model and its controlling neural circuitry by curating a set of published components. NEUROiD allows researchers to utilize remote high-performance computers for simulation, while controlling the model using a web browser.
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Affiliation(s)
- Raghu Sesha Iyengar
- Spine Labs, Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, India
| | - Madhav Vinodh Pithapuram
- Spine Labs, Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, India
| | - Avinash Kumar Singh
- Spine Labs, Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, India
| | - Mohan Raghavan
- Spine Labs, Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, India
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