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Asghari M, Elali K, Sullivan A, LaFleur B, Madigan ML, Toosizadeh N. Assessing the role of ankle and hip joint proprioceptive information in balance recovery using vibratory stimulation. Heliyon 2024; 10:e25979. [PMID: 38384543 PMCID: PMC10878948 DOI: 10.1016/j.heliyon.2024.e25979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 02/23/2024] Open
Abstract
Background Previous work suggests that proprioceptive information from ankle and hip are crucial in maintaining balance during upright standing; however, the contribution of these proprioceptive information during stepping balance recovery in not clear. The goal of the current study was to assess the role of ankle and hip proprioceptive information on balance recovery performance by manipulating type 1a afferent in muscle spindles using vibratory stimulation. Methods Twenty healthy young participants were recruited (age = 22.2 ± 2.7 years) and were randomly assigned to balance recovery sessions with either ankle or hip stimulation. Trip-like perturbations were imposed using a modified treadmill setup with a protecting harness. Vibratory stimulation was imposed bilaterally on ankle and hip muscles to expose participants to three condition of no-vibration, 40Hz vibration, and 80Hz vibration. Kinematics of the trunk and lower-extremities were measured using wearable sensors to characterize balance recovery performance. Outcomes were response time, recovery step length, trunk angle during toe-off and heel-strike of recovery stepping, and required time for full recovery. Findings Ankle vibratory stimulation elicited main effects on reaction time and recovery step length (p < 0.002); reaction time and recovery step length increased by 23.0% and 21.2%, respectively, on average across the conditions. Hip vibratory stimulation elicited significant increase in the full recovery time (p = 0.019), with 55.3% increase on average across the conditions. Interpretation Current findings provided evidence that vibratory stimulation can affect the balance recovery performance, causing a delayed recovery initiation and an impaired balance refinement after the recovery stepping when applied to ankle and hip muscles, respectively.
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Affiliation(s)
- Mehran Asghari
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Karam Elali
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Alexis Sullivan
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | | | - Michael L. Madigan
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, 24060, USA
| | - Nima Toosizadeh
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
- Arizona Center on Aging, Department of Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
- Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, Tucson, AZ, USA
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Kawai K, Kato Y, Ito T, Yamazaki K, Fukuhara J, Sakai Y, Morita Y. Biological Responses to Local Vibratory Stimulation for the Lower Legs and Lower Back and Criterion Values Based on Sweep Frequencies of Healthy Individuals: An Observational Study. Healthcare (Basel) 2023; 11:2243. [PMID: 37628441 PMCID: PMC10454103 DOI: 10.3390/healthcare11162243] [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: 05/02/2023] [Revised: 07/12/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Declining proprioceptive function is associated with problems such as lower back pain and falls. Therefore, we developed a vibration device using sweep frequency to evaluate several proprioceptors with different response frequency ranges. This study aimed to elucidate the biological responses of healthy individuals to vibratory stimulation at different sites and frequency ranges and to propose cutoff values to determine the decline in proprioceptive function. Mechanical vibration was separately applied to the lower legs and lower back, and proprioceptive function was evaluated by defining the ratio of the center of pressure (CoP) in the anteroposterior direction during mechanical vibration to that during no vibration in the three frequency ranges. The cut-off value was defined as the mean value, with the standard deviation subtracted for each indicator. The cut-off values were higher in the lower legs than in the lower back at all frequency ranges and in the 30-53 Hz and 56-100 Hz frequency ranges for both the lower legs and lower back. In healthy individuals, 9.9% and 8.6% were below the cut-off values in the 30-53 Hz and 56-100 Hz frequency ranges for the lower legs, respectively.
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Affiliation(s)
- Keitaro Kawai
- Department of Electrical and Mechanical Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan; (K.K.); (J.F.)
| | - Yoshiji Kato
- Department of Physical Therapy, Nagoya Women’s University, Nagoya 467-8610, Japan;
| | - Tadashi Ito
- Three-Dimensional Motion Analysis Room, Aichi Prefectural Mikawa Aoitori Medical and Rehabilitation Center for Developmental Disabilities, Okazaki 444-0002, Japan;
- Department of Integrated Health Sciences, Graduate School of Medicine, Nagoya University, Nagoya 461-8673, Japan
| | - Kazunori Yamazaki
- Institutional Research Center, Aichi Mizuho College, Nagoya 467-0867, Japan;
| | - Jo Fukuhara
- Department of Electrical and Mechanical Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan; (K.K.); (J.F.)
| | - Yoshihito Sakai
- Department of Orthopedic Surgery, National Center for Geriatrics and Gerontology, Obu 474-8511, Japan;
| | - Yoshifumi Morita
- Department of Electrical and Mechanical Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan; (K.K.); (J.F.)
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Chen YL, Jiang LJ, Cheng YY, Chen C, Hu J, Zhang AJ, Hua Y, Bai YL. Focal vibration of the plantarflexor and dorsiflexor muscles improves poststroke spasticity: a randomized single-blind controlled trial. Ann Phys Rehabil Med 2022; 66:101670. [PMID: 35940478 DOI: 10.1016/j.rehab.2022.101670] [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: 09/24/2021] [Revised: 01/23/2022] [Accepted: 02/15/2022] [Indexed: 12/02/2022]
Abstract
BACKGROUND Post-stroke spasticity is a cause of gait dysfunction and disability. Focal vibration (FV) of agonist-antagonist upper limb muscle pairs reduces flexor spasticity; however, its effects on ankle plantarflexor spasticity are uncertain. OBJECTIVE To assess the effects of focal vibration administered by a trained operator to the ankle plantarflexor and dorsiflexor muscles on post-stroke lower limb spasticity. METHODS A randomized, single-blind controlled trial of 64 participants with stroke and plantarflexor spasticity assigned to 3 groups by centralized, computer-generated randomization (1:1:1): 1) physiotherapy alone (CON), 2) physiotherapy+gastrocnemius vibration (FV_GM) and 3) physiotherapy+tibialis anterior vibration (FV_TA). Physiotherapists and assessors were blinded to group assignment. The experimental groups underwent 15, 20-min vibration sessions at 40 Hz. We performed evaluations at baseline and after the final treatment: Modified Ashworth Scale (MAS), Clonus scale, Functional Ambulation Categories (FAC), Fugl-Meyer Assessment - Lower Extremity (FMA_LE), Modified Barthel Index (MBI), and electromyography and ultrasound elastography. Primary outcome was remission rate (number and proportion of participants) of the MAS. RESULTS MAS remission rate was higher in FV_GM and FV_TA than CON groups (CON vs. FV_GM: p=0.009, odds ratio 0.15 [95% confidence interval 0.03-0.67]; CON vs. FV_TA: p=0.002, 0.12 [0.03-0.51]). Remission rate was higher in the experimental than CON groups for the Clonus scale (CON vs. FV_GM: p<0.001, OR 0.07 [95% CI 0.01-0.31]; CON vs. FV_TA: p=0.006, 0.14 [95% CI 0.03-0.61]). FAC remission rate was higher in the FV_TA than the CON (p=0.009, 0.18 [0.05-0.68]) and FV_GM (p=0.014, 0.27 [0.07-0.99]) groups. Ultrasound variables of the paretic medial gastrocnemius decreased more in FV_GM than CON and FV_TA groups (shear modulus: p=0.006; shear wave velocity: p=0.008). CONCLUSIONS Focal vibration reduced post-stroke spasticity of the plantarflexor muscles. Vibration of the tibialis anterior improved ambulation more than vibration of the gastrocnemius or physiotherapy alone. Gastrocnemius vibration may reduce spasticity by changing muscle stiffness.
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Affiliation(s)
- Ying-Lun Chen
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China; Department of Rehabilitation Medicine, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Liu-Jun Jiang
- Department of Rehabilitation Medicine, Huashan North Hospital, Fudan University, Shanghai, People's Republic of China
| | - Yang-Yang Cheng
- Department of Rehabilitation Medicine, Huashan North Hospital, Fudan University, Shanghai, People's Republic of China
| | - Chan Chen
- Department of Rehabilitation Medicine, Huashan North Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jian Hu
- Department of Rehabilitation Medicine, Huashan North Hospital, Fudan University, Shanghai, People's Republic of China
| | - An-Jing Zhang
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Yan Hua
- Department of Rehabilitation Medicine, Huashan North Hospital, Fudan University, Shanghai, People's Republic of China.
| | - Yu-Long Bai
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China.
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Sambe AY, Silva JKMD, Pellizzari CCDA, Valenciano PJ. Efeitos da vibração do tendão muscular no equilíbrio após acidente vascular cerebral: revisão sistemática. FISIOTERAPIA E PESQUISA 2022. [DOI: 10.1590/1809-2950/22007629032022pt] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
RESUMO Após o acidente vascular cerebral (AVC), as pessoas apresentam combinações complexas de déficits sensoriais, motores, cognitivos e emocionais que podem afetar o equilíbrio estático e dinâmico. O objetivo do estudo foi compilar e resumir as principais características e achados de protocolos utilizados em pesquisas que investigaram os efeitos da vibração no tendão muscular no equilíbrio estático e dinâmico em adultos com AVC. Trata-se de uma revisão sistemática, registrada na PROSPERO (CRD42022303874), em que foram realizadas buscas nas bases de dados PubMed, Cochrane, LILACS, SciELO, MEDLINE, Science Direct e PEDro, durante o mês de janeiro de 2022, por meio da combinação de palavras-chave relacionadas a “stroke”, “balance”, “muscle tendon vibration” e “randomized controlled trial”. A qualidade metodológica foi avaliada através da escala PEDro. Foram identificados 1.560 estudos, dos quais 11 foram incluídos, publicados entre 1994 e 2020, envolvendo 242 adultos pós-AVC. Apenas cinco estudos utilizaram a vibração como intervenção e verificaram melhora no equilíbrio estático e dinâmico. Seis estudos analisaram a interferência da vibração no controle postural, observando que o equilíbrio foi afetado durante a aplicação da vibração e que os indivíduos precisaram de mais tempo para se recuperar ou não sofreram diferenças significativas. Verificou-se que os efeitos da vibração do tendão muscular podem melhorar o equilíbrio em pessoas com AVC e influenciar o controle postural através de mecanismos proprioceptivos da vibração. Entretanto, são necessários mais estudos de alta qualidade metodológica para atingir um consenso em relação aos protocolos de tratamento com vibração do tendão muscular e sua recomendação na prática clínica.
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Sambe AY, Silva JKMD, Pellizzari CCDA, Valenciano PJ. Effects of muscle tendon vibration on balance after stroke: systematic review. FISIOTERAPIA E PESQUISA 2022. [DOI: 10.1590/1809-2950/22007629032022en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
ABSTRACT After cerebrovascular accident (CVA), people have complex combinations of sensory, motor, cognitive, and emotional deficits, which can affect static and dynamic balance. This study aimed to compile and summarize the main features and findings of protocols used in research that investigated the effects of muscle tendon vibration on static and dynamic balance in adults with stroke. This is a systematic review, registered in PROSPERO (CRD42022303874), in which searches were performed in the databases PubMed, Cochrane, LILACS, SciELO, MEDLINE, Science Direct, and PEDro, during the month of January 2022, using the combination of keywords related to “stroke,” “balance,” “muscle tendon vibration,” “randomized controlled trial.” Methodological quality was assessed using the PEDro scale. A total of 1,560 studies were identified, 11 of which were included, between the years 1994 to 2020, involving 242 post-stroke adults. Only five studies used vibration as an intervention and found an improvement in static and dynamic balance. Six studies analyzed the interference of vibration on postural control, showing that balance was affected during the application of vibration and that individuals needed more time to recover or did not experience significant differences. We found that the effects of muscle tendon vibration may be able to improve balance in people with stroke and influence postural control by proprioceptive mechanisms of vibration. However, more studies of high methodological quality are needed to reach a consensus regarding muscle tendon vibration treatment protocols and their recommendation in clinical practice.
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Papavasileiou A, Mademli L, Hatzitaki V, Patikas DA. Electromyographic responses to unexpected Achilles tendon vibration-induced perturbations during standing in young and older people. Exp Brain Res 2022; 240:1017-1027. [PMID: 35171309 DOI: 10.1007/s00221-022-06309-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 01/16/2022] [Indexed: 02/04/2023]
Abstract
This study aimed to investigate age-related differences in electromyographic (EMG) responses to unexpected Achilles tendon vibration (ATV) perturbations while standing blindfold. ATV with variable and random duration (12-15 s) and rest periods (20-24 s) was applied on 18 young and 16 older volunteers. The anterior/posterior center of pressure (CoP) and the soleus (SOL) and tibialis anterior (TA) EMG were analyzed for 1 s before and 8 s after the ATV onset and offset. ATV induced a posterior shift of CoP in both groups, with more pronounced shift in the older group. During ATV onset, the older group demonstrated less SOL and more TA EMG increase compared to the young group. During the first 0.5 s of ATV offset, SOL EMG was decreased in both age groups, while TA showed a burst of EMG activity that was greater in the older group. No difference in the latencies of EMG peaks or valleys was observed between the groups. It is concluded that ATV induces greater posterior CoP shift in older adults, and they adopt a recovery strategy, characterized by a decreased SOL activation and an increased TA activation. These differences are possibly attributed to the increased fear of falling, decreased limits of stability and reduced capacity of older people to reweight their sensory inflow when proprioception is distorted.
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Affiliation(s)
- Anastasia Papavasileiou
- School of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, 62110, Ag. Ioannis, Serres, Greece
| | - Lida Mademli
- School of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, 62110, Ag. Ioannis, Serres, Greece
| | - Vassilia Hatzitaki
- School of Physical Education and Sport Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios A Patikas
- School of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, 62110, Ag. Ioannis, Serres, Greece.
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Effect of plantar vibration on static and dynamic balance in stroke patients: a randomised controlled study. Physiotherapy 2022; 116:1-8. [DOI: 10.1016/j.physio.2022.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/28/2021] [Accepted: 02/11/2022] [Indexed: 11/22/2022]
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The Role of Predictability of Perturbation in Control of Posture: A Scoping Review. Motor Control 2021; 26:97-143. [PMID: 34891127 DOI: 10.1123/mc.2021-0074] [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: 05/18/2021] [Revised: 09/28/2021] [Accepted: 10/19/2021] [Indexed: 11/18/2022]
Abstract
Efficient maintenance of posture depends on the ability of humans to predict consequences of a perturbation applied to their body. The purpose of this scoping review was to map the literature on the role of predictability of a body perturbation in control of posture. A comprehensive search of MEDLINE, EMBASE, and CINAHL databases was conducted. Inclusion criteria were studies of adults participating in experiments involving body perturbations, reported outcomes of posture and balance control, and studies published in English. Sixty-three studies were selected. The reviewed information resources included the availability of sensory information and the exposure to perturbations in different sequences of perturbation magnitudes or directions. This review revealed that people use explicit and implicit information resources for the prediction of perturbations. Explicit information consists of sensory information related to perturbation properties and timing, whereas implicit information involves learning from repetitive exposures to perturbations of the same properties.
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Maitre J, Noé F, González LM, García-Massó X, Paillard T. The tightening parameters of the vibratory devices modify their disturbing postural effects. J Biomech 2021; 126:110624. [PMID: 34293599 DOI: 10.1016/j.jbiomech.2021.110624] [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: 12/28/2020] [Revised: 06/28/2021] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
The purpose was to specify the impact of two different forces exerted by vibratory devices on the Achilles tendon on postural balance. The postural balance of 13 participants was evaluated on a force platform in two 40 s bipedal stance conditions with closed eyes. Tendon vibrations (80 Hz) were triggered 10 s after the beginning of the postural evaluation and applied during 20 s. Two levels of the force exerted by the vibrators were calibrated using load cells to control the tightening parameters of the vibrators: a strong tightening (ST) condition at 45 N and a light tightening (LT) condition at 5 N. The soleus electromyographic (EMG) activity and the spatio-temporal parameters of displacement of the centre of foot pressure (COP) were analysed. To analyse the effects of the introduction, the adaptation and the end of the stimulation, non-parametric tests were used. The results indicated that the soleus EMG activity increased only in the ST condition. However, during the vibration the anteroposterior COP position was significantly more in a backward position in the LT condition. At the end of the vibration, COP parameters increased more in the LT condition than the ST condition. This study demonstrated that the effects of the vibration depended on the force exerted by the devices on the tendons. The ST increased the vibration effects on EMG activity through greater stimulating effects compared to the LT. However, the ST could also increase the ankle joint stiffness and/or somaesthetic sensory information, which attenuated the COP backward shift.
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Affiliation(s)
- Julien Maitre
- Université de Pau et des Pays de l'Adour, E2S UPPA, Laboratoire Mouvement, Equilibre, Performance et Santé, 11 rue Morane Saulnier Tarbes 65000, France.
| | - Frédéric Noé
- Université de Pau et des Pays de l'Adour, E2S UPPA, Laboratoire Mouvement, Equilibre, Performance et Santé, 11 rue Morane Saulnier Tarbes 65000, France
| | - Luís-Millán González
- University of Valence Departamento de Educación Física y Deportes, Facultat de Ciencies de l'Activitat Fisica i l'Esport, València, Spain
| | - Xavier García-Massó
- University of Valence, Departamento de Didàctica de l'Expressió Musical, Plàstica i Corporal, València, Spain
| | - Thierry Paillard
- Université de Pau et des Pays de l'Adour, E2S UPPA, Laboratoire Mouvement, Equilibre, Performance et Santé, 11 rue Morane Saulnier Tarbes 65000, France
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Busquets A, Ferrer-Uris B, Angulo-Barroso R, Federolf P. Gymnastics Experience Enhances the Development of Bipedal-Stance Multi-Segmental Coordination and Control During Proprioceptive Reweighting. Front Psychol 2021; 12:661312. [PMID: 33935920 PMCID: PMC8081832 DOI: 10.3389/fpsyg.2021.661312] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 03/17/2021] [Indexed: 01/01/2023] Open
Abstract
Performance and control of upright bipedal posture requires a constant and dynamic integration of relative contributions of different sensory inputs (i. e., sensory reweighting) to enable effective adaptations as individuals face environmental changes and perturbations. Children with gymnastic experience showed balance performance closer to that of adults during and after proprioceptive alteration than children without gymnastic experience when their center of pressure (COP) was analyzed. However, a particular COP sway can be achieved through performing and coordinating different postural movements. The aim of this study was to assess how children and adults of different gymnastic experience perform and control postural movements while they have to adjust balance during and after bilateral tendon vibration. All participants were equipped with spherical markers attached to their skin and two vibrators strapped over the Achilles tendons. Bipedal stance was performed in three 45-s trials in two visual conditions (eyes open, EO, and eyes closed, EC) ordered randomly in which vibration lasted 10 s. Posture movements were analyzed by a principal component analysis (PCA) calculated on normalized and weighted markers coordinates. The relative standard deviation of each principal movement component (principal position, PP-rSTD) quantified its contribution to the whole postural movements, i.e., quantified the coordinative structure. The first (principal velocities, PV-rSTD) and second (principal accelerations, PA-rSTD) time-derivatives characterized the rate-dependent sensory information associated with and the neuromuscular control of the postural movements, respectively. Children without gymnastic experience showed a different postural coordinative structure and different sensory-motor control characteristics. They used less ankle movements in the anterior-posterior direction but increased ankle movements in medio-lateral direction, presented larger hip and trunk velocities, and exhibited more hip actions. Gymnastic experience during childhood seemed to benefit the development of proprioceptive reweighting processes in children, leading to a more mature form of coordinating and controlling posture similarly to adults.
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Affiliation(s)
- Albert Busquets
- Institut Nacional d'Educació Física de Catalunya (INEFC), Universitat de Barcelona (UB), Barcelona, Spain
| | - Blai Ferrer-Uris
- Institut Nacional d'Educació Física de Catalunya (INEFC), Universitat de Barcelona (UB), Barcelona, Spain
| | - Rosa Angulo-Barroso
- Institut Nacional d'Educació Física de Catalunya (INEFC), Universitat de Barcelona (UB), Barcelona, Spain.,Department of Kinesiology, California State University, Northridge, CA, United States
| | - Peter Federolf
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
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Sensory Reweighting During Bipedal Quiet Standing in Adolescents. Motor Control 2020; 24:383-396. [PMID: 32413840 DOI: 10.1123/mc.2018-0119] [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: 12/21/2018] [Revised: 03/02/2020] [Accepted: 03/02/2020] [Indexed: 11/18/2022]
Abstract
A cross-sectional, prospective, between-subjects design was used in this study to establish the differences in sensory reweighting of postural control among different ages during adolescence. A total of 153 adolescents (five age groups; 13-17 years old) performed bipedal standing in three sensory conditions (i.e., with visual restriction, vestibular disturbance, and proprioceptive disturbance). Center of pressure displacement signals were measured in mediolateral and anteroposterior directions to characterize reweighting in the sensory system in static postural control when sensory information is disturbed or restricted during adolescent growth. The results indicate a development of postural control, showing large differences between subjects of 13-14 years old and older adolescents. A critical change was found in sensory reweighting during bipedal stance with disturbance of proprioceptive information at 15 years old. Adolescents of 13-14 years old showed less postural control and performance than older adolescents during the disturbance of proprioceptive information. Moreover, the results demonstrated that the visual system achieves its development around 15-16 years old. In conclusion, this research suggests that a difference of sensory reweighting under this type of sensorial condition and sensory reweight systems would seem to achieve stabilization at the age of 15.
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Henry M, Baudry S. Age-related changes in leg proprioception: implications for postural control. J Neurophysiol 2019; 122:525-538. [PMID: 31166819 DOI: 10.1152/jn.00067.2019] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
In addition to being a prerequisite for many activities of daily living, the ability to maintain steady upright standing is a relevant model to study sensorimotor integrative function. Upright standing requires managing multimodal sensory inputs to produce finely tuned motor output that can be adjusted to accommodate changes in standing conditions and environment. The sensory information used for postural control mainly arises from the vestibular system of the inner ear, vision, and proprioception. Proprioception (sense of body position and movement) encompasses signals from mechanoreceptors (proprioceptors) located in muscles, tendons, and joint capsules. There is general agreement that proprioception signals from leg muscles provide the primary source of information for postural control. This is because of their exquisite sensitivity to detect body sway during unperturbed upright standing that mainly results from variations in leg muscle length induced by rotations around the ankle joint. However, aging is associated with alterations of muscle spindles and their neural pathways, which induce a decrease in the sensitivity, acuity, and integration of the proprioceptive signal. These alterations promote changes in postural control that reduce its efficiency and thereby may have deleterious consequences for the functional independence of an individual. This narrative review provides an overview of how aging alters the proprioceptive signal from the legs and presents compelling evidence that these changes modify the neural control of upright standing.
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Affiliation(s)
- Mélanie Henry
- Laboratory of Applied Biology and Research Unit in Applied Neurophysiology, ULB Neuroscience Institute, Université libre de Bruxelles, Brussels, Belgium
| | - Stéphane Baudry
- Laboratory of Applied Biology and Research Unit in Applied Neurophysiology, ULB Neuroscience Institute, Université libre de Bruxelles, Brussels, Belgium
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Proprioceptive Weighting Ratio for Balance Control in Static Standing Is Reduced in Elderly Patients With Non-Specific Low Back Pain. Spine (Phila Pa 1976) 2018; 43:1704-1709. [PMID: 30059489 DOI: 10.1097/brs.0000000000002817] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
UNLABELLED MINI: Elderly patients older than 65 years were divided into non-specific low back pain (NSLBP) and non-LBP (NLBP) groups. The postural control study of the relative contributions of different proprioceptive signals (relative proprioceptive weighting ratio [RPW]) revealed lower leg proprioceptive decreases (RPW 240 Hz) in NSLBP compared to NLBP. STUDY DESIGN A cross-sectional, observational study. OBJECTIVE The aim of this study was to determine a specific proprioceptive control strategy during postural balance in elderly patients with non-specific low back pain (NSLBP) and non-LBP (NLBP). SUMMARY OF BACKGROUND DATA Proprioceptive decline is an important risk factor for decreased balance control in elderly patients with NSLBP. The resulting reduction in proprioception in the trunk or lower legs may contribute to a reduction in postural sway. This study aims to determine the specific proprioceptive control strategy used during postural balance in elderly patients with NSLBP and NLBP and to assess whether this strategy is related to proprioceptive decline in NSLBP. METHODS Pressure displacement centers were determined in 28 elderly patients with NSLBP and 46 elderly patients with NLBP during upright stances on a balance board without the benefit of vision. Gastrocnemius and lumbar multifidus muscle vibratory stimulations at 30, 60, and 240 Hz, respectively, were applied to evaluate the relative contributions of the different proprioceptive signals (relative proprioceptive weighting ratio, RPW) used in postural control. RESULTS Compared to elderly patients with NLBP, those with NSLBP had a lower RPW at 240 Hz and significantly higher RPW at 30 Hz. A logistic regression analysis showed that RPW at 240 Hz was independently associated with NSLBP after controlling for confounding factors. CONCLUSION Elderly patients with NSLBP decreased their reliance on ankle strategy (RPW at 240 Hz) and hip strategy (RPW at 30 Hz) proprioceptive signals during balance control. The inability to control hip and ankle strategies indicates a deficit of postural control and is hypothesized to result from proprioceptive impairment. Moreover, elderly patients with NSLBP are at higher risk for lower leg proprioceptive decrease (240 Hz) through the NSLBP exacerbation. LEVEL OF EVIDENCE 4.
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Rasman BG, Forbes PA, Tisserand R, Blouin JS. Sensorimotor Manipulations of the Balance Control Loop-Beyond Imposed External Perturbations. Front Neurol 2018; 9:899. [PMID: 30416481 PMCID: PMC6212554 DOI: 10.3389/fneur.2018.00899] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/03/2018] [Indexed: 12/22/2022] Open
Abstract
Standing balance relies on the integration of multiple sensory inputs to generate the motor commands required to stand. Mechanical and sensory perturbations elicit compensatory postural responses that are interpreted as a window into the sensorimotor processing involved in balance control. Popular methods involve imposed external perturbations that disrupt the control of quiet stance. Although these approaches provide critical information on how the balance system responds to external disturbances, the control mechanisms involved in correcting for these errors may differ from those responsible for the regulation of quiet standing. Alternative approaches use manipulations of the balance control loop to alter the relationship between sensory and motor cues. Coupled with imposed perturbations, these manipulations of the balance control loop provide unique opportunities to reveal how sensory and motor signals are integrated to control the upright body. In this review, we first explore imposed perturbation approaches that have been used to investigate the neural control of standing balance. We emphasize imposed perturbations that only elicit balance responses when the disturbing stimuli are relevant to the balance task. Next, we highlight manipulations of the balance control loop that, when carefully implemented, replicate and/or alter the sensorimotor dynamics of quiet standing. We further describe how manipulations of the balance control loop can be used in combination with imposed perturbations to characterize mechanistic principles underlying the control of standing balance. We propose that recent developments in the use of robotics and sensory manipulations will continue to enable new possibilities for simulating and/or altering the sensorimotor control of standing beyond compensatory responses to imposed external perturbations.
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Affiliation(s)
- Brandon G. Rasman
- Department of Neuroscience, Erasmus Medical Center, Rotterdam, Netherlands
- School of Kinesiology, University of British Columbia, Vancouver, BC, Canada
| | - Patrick A. Forbes
- Department of Neuroscience, Erasmus Medical Center, Rotterdam, Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Delft, Netherlands
| | - Romain Tisserand
- School of Kinesiology, University of British Columbia, Vancouver, BC, Canada
| | - Jean-Sébastien Blouin
- School of Kinesiology, University of British Columbia, Vancouver, BC, Canada
- Djavad Mowafaghian Center for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Institute for Computing, Information and Cognitive Systems, University of British Columbia, Vancouver, BC, Canada
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Aboutorabi A, Arazpour M, Bahramizadeh M, Farahmand F, Fadayevatan R. Effect of vibration on postural control and gait of elderly subjects: a systematic review. Aging Clin Exp Res 2018; 30:713-726. [PMID: 28918597 DOI: 10.1007/s40520-017-0831-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 09/05/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND AIM Gait and balance disorders are common in the elderly populations, and their prevalence increases with age. This systematic review was performed to summarize the current evidence for subthreshold vibration interventions on postural control and gait in elderly. METHOD A review of intervention studies including the following words in the title/abstract: insole, foot and ankle appliances, vibration, noise and elderly related to balance and gait. Databases searched included PubMed, ISI Web of Knowledge, Ovid, Scopus, and Google Scholar. Fifteen articles were selected for final evaluation. The procedure was followed using the preferred reporting items for systematic reviews and meta-analysis method. RESULTS There was reduction in center of pressure velocity and displacement especially with eyes closed using vibration in healthy elderly subjects and this effect was greater in elderly faller and patients with more balance deficiency. Vibration programme training increased speed of walking, cadence, step time and length in stroke subjects. The vibratory insoles significantly improved performance on the Timed Up and Go and Functional Reach tests in older people. CONCLUSION Vibration was effective on balance improvement in elderly subject especially elderly with more balance deficiency and it can improve gait parameters in patients with greater baseline variability.
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Affiliation(s)
- Atefeh Aboutorabi
- Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Kodakyarst., Daneshjo Blvd., Evin, Tehran, 1985713834, Iran
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mokhtar Arazpour
- Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Kodakyarst., Daneshjo Blvd., Evin, Tehran, 1985713834, Iran.
| | - Mahmood Bahramizadeh
- Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Kodakyarst., Daneshjo Blvd., Evin, Tehran, 1985713834, Iran
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Farzam Farahmand
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
| | - Reza Fadayevatan
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
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St George RJ, Gurfinkel VS, Kraakevik J, Nutt JG, Horak FB. Case Studies in Neuroscience: A dissociation of balance and posture demonstrated by camptocormia. J Neurophysiol 2018; 119:33-38. [PMID: 28978769 DOI: 10.1152/jn.00582.2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Upright stance in humans requires an intricate exchange between the neural mechanisms that control balance and those that control posture; however, the distinction between these control systems is hard to discern in healthy subjects. By studying balance and postural control of a participant with camptocormia - an involuntary flexion of the trunk during standing that resolves when supine - a divergence between balance and postural control was revealed. A kinematic and kinetic investigation of standing and walking showed a stereotyped flexion of the upper body by almost 80° over a few minutes, and yet the participant's ability to control center of mass within the base of support and to compensate for external perturbations remained intact. This unique case also revealed the involvement of automatic, tonic control of the paraspinal muscles during standing and the effects of attention. Although strength was reduced and MRI showed a reduction in muscle mass, there was sufficient strength to maintain an upright posture under voluntary control and when using geste antagoniste maneuvers or "sensory tricks" from visual, auditory, and haptic biofeedback. Dual tasks that either increased or decreased the attention given to postural alignment would decrease or increase the postural flexion, respectively. The custom-made "twister" device that measured axial resistance to slow passive rotation revealed abnormalities in axial muscle tone distribution during standing. The results suggest that the disorder in this case was due to a disruption in the automatic, tonic drive to the postural muscles and that myogenic changes were secondary. NEW & NOTEWORTHY By studying an idiopathic camptocormia case with a detailed biomechanical and sensorimotor approach, we have demonstrated unique insights into the neural control of human bipedalism 1) balance and postural control cannot be considered the same neural process, as there is a stereotyped abnormal flexed posture, without balance deficits, associated with camptocormia, and 2) posture during standing is controlled by automatic axial tone but "sensory tricks" involving sensory biofeedback to direct voluntary attention to postural alignment can override, when required.
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Affiliation(s)
- R J St George
- Sensorimotor Neuroscience and Ageing, School of Medicine, University of Tasmania , Australia
| | - V S Gurfinkel
- Department of Neurology, Oregon Health & Science University , Portland, Oregon
| | - J Kraakevik
- Department of Neurology, Oregon Health & Science University , Portland, Oregon
| | - J G Nutt
- Department of Neurology, Oregon Health & Science University , Portland, Oregon
| | - F B Horak
- Department of Neurology, Oregon Health & Science University , Portland, Oregon.,VA Health Care System, Portland, Oregon
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Magnard J, Cornu C, Berrut G, Deschamps T. Examination of reactive motor responses to Achilles tendon vibrations during an inhibitory stepping reaction time task. Hum Mov Sci 2017; 56:119-128. [PMID: 29121491 DOI: 10.1016/j.humov.2017.10.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 10/26/2017] [Accepted: 10/27/2017] [Indexed: 11/16/2022]
Abstract
Inhibition is known to influence balance, step initiation and gait control. A specific subcomponent of inhibition, the perceptual inhibition process, has been suggested to be specifically involved in the integration of proprioceptive information that is necessary for efficient postural responses. This study aimed to investigate the inhibition requirements of planning and executing a choice step initiation task in young adults following experimental perturbation of proprioceptive information using Achilles tendon vibrations. We developed an inhibitory stepping reaction time task in which participants had to step in response to visual arrows that manipulated specific perceptual or motor inhibition according to two proprioceptive configurations: without or with application of vibrations. Performance of twenty-eight participants (mean age 21 years) showed that Achilles tendon vibrations induced an increase in attentional demands (higher reaction time and longer motor responses). Further, this increase in attentional demands did not affect specifically the different inhibitory processes tested in this reactive stepping task. It suggests that attentional demands associated with the vibratory perturbation to postural control do not lead to a shift from automatic to more attentional inhibition processes, at least in young adults.
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Affiliation(s)
- Justine Magnard
- Laboratory "Movement, Interactions, Performance" (E.A. 4334), University of Nantes, France
| | - Christophe Cornu
- Laboratory "Movement, Interactions, Performance" (E.A. 4334), University of Nantes, France
| | - Gilles Berrut
- Laboratory "Movement, Interactions, Performance" (E.A. 4334), University of Nantes, France; Investigations Clinical Center of Gerontology Department, Teaching Nantes Hospital, France
| | - Thibault Deschamps
- Laboratory "Movement, Interactions, Performance" (E.A. 4334), University of Nantes, France.
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Cerebellar transcranial direct current stimulation improves adaptive postural control. Clin Neurophysiol 2017; 129:33-41. [PMID: 29136550 DOI: 10.1016/j.clinph.2017.09.118] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 09/11/2017] [Accepted: 09/28/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Rehabilitation interventions contribute to recovery of impaired postural control, but it remains a priority to optimize their effectiveness. A promising strategy may involve transcranial direct current stimulation (tDCS) of brain areas involved in fine-tuning of motor adaptation. This study explored the effects of cerebellar tDCS (ctDCS) on postural recovery from disturbance by Achilles tendon vibration. METHODS Twenty-eight healthy volunteers participated in this sham-ctDCS controlled study. Standing blindfolded on a force platform, four trials were completed: 60 s quiet standing followed by 20 min active (anodal-tDCS, 1 mA, 20 min, N = 14) or sham-ctDCS (40 s, N = 14) tDCS; three quiet standing trials with 15 s of Achilles tendon vibration and 25 s of postural recovery. Postural steadiness was quantified as displacement, standard deviation and path derived from the center of pressure (COP). RESULTS Baseline demographics and quiet standing postural steadiness, and backwards displacement during vibration were comparable between groups. However, active-tDCS significantly improved postural steadiness during vibration and reduced forward displacement and variability in COP derivatives during recovery. CONCLUSIONS We demonstrate that ctDCS results in short-term improvement of postural adaptation in healthy individuals. SIGNIFICANCE Future studies need to investigate if multisession ctDCS combined with training or rehabilitation interventions can induce prolonged improvement of postural balance.
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Bonan I, Butet S, Jamal K, Yelnik A, Tasseel Ponche S, Leplaideur S. Difference between individuals with left and right hemiparesis in the effect of gluteus medius vibration on body weight shifting. Neurophysiol Clin 2017; 47:419-426. [PMID: 28958790 DOI: 10.1016/j.neucli.2017.08.002] [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: 02/15/2017] [Revised: 07/13/2017] [Accepted: 08/29/2017] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVE To test the effect of gluteus medius (GM) vibration on the reduction of asymmetric body weight distribution in individuals with hemiparesis (HP) at two stages of postural recovery. METHODS The effects of GM vibration according to the shift of the body weight (%Shift) onto the paretic leg during GM vibration were registered while standing on a force-platform in 40 HP (19 left and 21 right; mean age 54.7±10.6years, mean time after stroke 2.0±1.3months), as soon as they could stand without assistance and 4 to 6 weeks later, and in 40 control subjects (mean age 54.7±10.5years). RESULTS Without vibration, baseline body weight (BW) distribution was characterized by underloading of the paretic limb (mean BW on the paretic limb 37.2%±13.1%). At the early stage of balance recovery, % shift toward the paretic limb induced by GM vibration differed significantly between left and right HP (P=0.049) and between left HP and controls (C) (P=0.022) and was related to BW asymmetry (r=0.437, P=0.004). Later, GM vibration reduced asymmetric BW distribution in most HP and no difference was found between left and right HP and between left and C. CONCLUSION At an advanced stage of postural recovery, GM vibration could help encourage HP to put weight on the affected limb. Interestingly, a behavioral difference was initially observed between right and left HP that could probably be explained by a different strategy due to the baseline severity of the BW asymmetry.
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Affiliation(s)
- I Bonan
- Physical Medicine and Rehabilitation department, centre hospitalier universitaire, 2, rue Henri-le-Guilloux, 35000 Rennes, France; Unité visages U1228 Rennes 1, France.
| | - S Butet
- Physical Medicine and Rehabilitation department, centre hospitalier universitaire, 2, rue Henri-le-Guilloux, 35000 Rennes, France
| | - K Jamal
- Physical Medicine and Rehabilitation department, centre hospitalier universitaire, 2, rue Henri-le-Guilloux, 35000 Rennes, France
| | - A Yelnik
- Physical Medicine and Rehabilitation department, centre hospitalier universitaire, Lariboisière-Saint-Louis, 75010 Paris, France
| | - S Tasseel Ponche
- Physical Medicine and Rehabilitation department, centre hospitalier universitaire, Lariboisière-Saint-Louis, 75010 Paris, France
| | - S Leplaideur
- Physical Medicine and Rehabilitation department, centre hospitalier universitaire, 2, rue Henri-le-Guilloux, 35000 Rennes, France; PRM department, KERPAPE, BP 78, 56275 Ploemeur cedex, France
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Xu I, Laurendeau S, Teasdale N, Simoneau M. Change in the natural head-neck orientation momentarily altered sensorimotor control during sensory transition. Gait Posture 2017; 53:80-85. [PMID: 28119230 DOI: 10.1016/j.gaitpost.2017.01.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 01/09/2017] [Accepted: 01/10/2017] [Indexed: 02/02/2023]
Abstract
Achilles tendon vibration generates proprioceptive information that is incongruent with the actual body position; it alters the perception of body orientation leading to a vibration-induced postural response. When a person is standing freely, vibration of the Achilles tendon shifts the internal representation of the verticality backward thus the vibration-induced postural response realigned the whole body orientation with the shifted subjective vertical. Because utricular otoliths information participates in the creation of the internal representation of the verticality, changing the natural orientation of the head-neck system during Achilles tendon vibration could alter the internal representation of the earth vertical to a greater extent. Consequently, it was hypothesized that compared to neutral head-neck orientation, alteration in the head-neck orientation should impair balance control immediately after Achilles tendon vibration onset or offset (i.e., sensory transition) as accurate perception of the earth vertical is required. Results revealed that balance control impairment was observed only immediately following Achilles tendon vibration offset; both groups with the head-neck either extended or flexed showed larger body sway (i.e., larger root mean square scalar distance between the center of pressure and center of gravity) compared to the group with the neutral head-neck orientation. The fact that balance control was uninfluenced by head-neck orientation immediately following vibration onset suggests the error signal needs to accumulate to a certain threshold before the internal representation of the earth vertical becomes incorrect.
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Affiliation(s)
- Isabelle Xu
- Faculté de médecine, Université Laval, Canada
| | - Simon Laurendeau
- Faculté de médecine, Département de kinésiologie, Université Laval, Canada; Centre de recherche du CHU de Québec, Québec, Québec, Canada
| | - Normand Teasdale
- Faculté de médecine, Département de kinésiologie, Université Laval, Canada; Centre de recherche du CHU de Québec, Québec, Québec, Canada
| | - Martin Simoneau
- Faculté de médecine, Département de kinésiologie, Université Laval, Canada; Centre de recherche du CHU de Québec, Québec, Québec, Canada.
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Kabbaligere R, Lee BC, Layne CS. Balancing sensory inputs: Sensory reweighting of ankle proprioception and vision during a bipedal posture task. Gait Posture 2017; 52:244-250. [PMID: 27978501 DOI: 10.1016/j.gaitpost.2016.12.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 12/01/2016] [Accepted: 12/06/2016] [Indexed: 02/02/2023]
Abstract
During multisensory integration, it has been proposed that the central nervous system (CNS) assigns a weight to each sensory input through a process called sensory reweighting. The outcome of this integration process is a single percept that is used to control posture. The main objective of this study was to determine the interaction between ankle proprioception and vision during sensory integration when the two inputs provide conflicting sensory information pertaining to direction of body sway. Sensory conflict was created by using bilateral Achilles tendon vibration and contracting visual flow and produced body sway in opposing directions when applied independently. Vibration was applied at 80Hz, 1mm amplitude and the visual flow consisted of a virtual reality scene with concentric rings retreating at 3m/s. Body sway elicited by the stimuli individually and in combination was evaluated in 10 healthy young adults by analyzing center of pressure (COP) displacement and lower limb kinematics. The magnitude of COP displacement produced when vibration and visual flow were combined was found to be lesser than the algebraic sum of COP displacement produced by the stimuli when applied individually. This suggests that multisensory integration is not merely an algebraic summation of individual cues. Instead the observed response might be a result of a weighted combination process with the weight attached to each cue being directly proportional to the relative reliability of the cues. The moderating effect of visual flow on postural instability produced by vibration points to the potential use of controlled visual flow for balance training.
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Affiliation(s)
- Rakshatha Kabbaligere
- Department of Health and Human Performance, University of Houston, Houston, TX, United States; Center for Neuromotor and Biomechanics Research, University of Houston, Houston, TX, United States.
| | - Beom-Chan Lee
- Department of Health and Human Performance, University of Houston, Houston, TX, United States; Center for Neuromotor and Biomechanics Research, University of Houston, Houston, TX, United States
| | - Charles S Layne
- Department of Health and Human Performance, University of Houston, Houston, TX, United States; Center for Neuromotor and Biomechanics Research, University of Houston, Houston, TX, United States; Center for Neuro-Engineering and Cognitive Science, University of Houston, Houston, TX, United States
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Lubetzky AV, Price R, McCoy SW. Effects of Achilles tendon vibration, surface and visual conditions on lower leg electromyography in young adults with and without recurrent ankle sprains. J Bodyw Mov Ther 2016; 20:639-49. [PMID: 27634090 DOI: 10.1016/j.jbmt.2016.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/04/2016] [Accepted: 01/10/2016] [Indexed: 10/22/2022]
Abstract
Functional ankle instability is associated with decreased ankle muscle function. Compliant surfaces and eyes-closed training are commonly used for rehabilitation and prevention of ankle sprains. Brief Achilles tendon vibration is commonly used in the study of postural control. To test the level of activation of tibialis anterior (TIB) and fibularis longus (FIB), bilateral Achilles tendon vibration was applied for the middle 20 s in a series of 60-s trials, when 10 healthy young adults and 10 adults with history of repeated ankle sprains were standing bipedal: on floor, on memory foam, or on a Both Sides Up (BOSU) ball, with eyes open, and on floor and foam with eyes closed. Differences in Integrated surface electromyography (IEMG) of TIB and FIB were significant for both groups pre, during, and post vibration (Friedman Tests, p < 0.001 for all). In both groups, the highest IEMG for TIB was obtained during vibration when standing on foam with eyes closed, whereas the highest IEMG for FIB was obtained during vibration when standing on the BOSU. Bipedal stance on BOSU and brief Achilles tendon vibration may be a useful intervention when a session's goal is to facilitate lower leg muscles activation. Future research should explore training effects as well as the effect of FIB tendon vibration.
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Affiliation(s)
| | - Robert Price
- University of Washington, Seattle, WA, United States
| | - Sarah W McCoy
- University of Washington, Seattle, WA, United States
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Eysel-Gosepath K, McCrum C, Epro G, Brüggemann GP, Karamanidis K. Visual and proprioceptive contributions to postural control of upright stance in unilateral vestibulopathy. Somatosens Mot Res 2016; 33:72-8. [PMID: 27166786 DOI: 10.1080/08990220.2016.1178635] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Preserving upright stance requires central integration of the sensory systems and appropriate motor output from the neuromuscular system to keep the centre of pressure (COP) within the base of support. Unilateral peripheral vestibular disorder (UPVD) causes diminished stance stability. The aim of this study was to determine the limits of stability and to examine the contribution of multiple sensory systems to upright standing in UPVD patients and healthy subjects. We hypothesized that closure of the eyes and Achilles tendon vibration during upright stance will augment the postural sway in UPVD patients more than in healthy subjects. Seventeen UPVD patients and 17 healthy subjects performed six tasks on a force plate: forwards and backwards leaning, to determine limits of stability, and upright standing with and without Achilles tendon vibration, each with eyes open and closed (with blackout glasses). The COP displacement of the patients was significantly greater in the vibration tasks than the controls and came closer to the posterior base of support boundary than the controls in all tasks. Achilles tendon vibration led to a distinctly more backward sway in both subject groups. Five of the patients could not complete the eyes closed with vibration task. Due to the greater reduction in stance stability when the proprioceptive, compared with the visual, sensory system was disturbed, we suggest that proprioception may be more important for maintaining upright stance than vision. UPVD patients, in particular, showed more difficulty in controlling postural stability in the posterior direction with visual and proprioceptive sensory disturbance.
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Affiliation(s)
- Katrin Eysel-Gosepath
- a Department of Otolaryngology, Head and Neck Surgery , Heinrich Heine University of Düsseldorf , Düsseldorf , Germany
| | - Christopher McCrum
- b NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Centre+, Department of Human Movement Science , Maastricht , The Netherlands ;,c Institute of Movement and Sport Gerontology, German Sport University Cologne , Cologne , Germany
| | - Gaspar Epro
- c Institute of Movement and Sport Gerontology, German Sport University Cologne , Cologne , Germany ;,d Institute of Biomechanics and Orthopaedics, German Sport University Cologne , Cologne , Germany
| | - Gert-Peter Brüggemann
- d Institute of Biomechanics and Orthopaedics, German Sport University Cologne , Cologne , Germany
| | - Kiros Karamanidis
- c Institute of Movement and Sport Gerontology, German Sport University Cologne , Cologne , Germany
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Temple DR, Lee BC, Layne CS. Effects of tibialis anterior vibration on postural control when exposed to support surface translations. Somatosens Mot Res 2016; 33:42-8. [PMID: 27074599 DOI: 10.3109/08990220.2016.1171207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The sensory re-weighting theory suggests unreliable inputs may be down-weighted to favor more reliable sensory information and thus maintain proper postural control. This study investigated the effects of tibialis anterior (TA) vibration on center of pressure (COP) motion in healthy individuals exposed to support surface translations to further explore the concept of sensory re-weighting. Twenty healthy young adults stood with eyes closed and arms across their chest while exposed to randomized blocks of five trials. Each trial lasted 8 s, with TA vibration either on or off. After 2 s, a sudden backward or forward translation occurred. Anterior-posterior (A/P) COP data were evaluated during the preparatory (first 2 s), perturbation (next 3 s), and recovery (last 3 s) phases to assess the effect of vibration on perturbation response features. The knowledge of an impending perturbation resulted in reduced anterior COP motion with TA vibration in the preparatory phase relative to the magnitude of anterior motion typically observed during TA vibration. During the perturbation phase, vibration did not influence COP motion. However, during the recovery phase vibration induced greater anterior COP motion than during trials without vibration. The fact that TA vibration produced differing effects on COP motion depending upon the phase of the perturbation response may suggest that the immediate context during which postural control is being regulated affects A/P COP responses to TA vibration. This indicates that proprioceptive information is likely continuously re-weighted according to the context in order to maintain effective postural control.
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Affiliation(s)
- David R Temple
- a Department of Health and Human Performance , University of Houston , Houston , TX , USA ;,b Center for Neuromotor and Biomechanics Research, University of Houston , Houston , TX , USA
| | - Beom-Chan Lee
- a Department of Health and Human Performance , University of Houston , Houston , TX , USA ;,b Center for Neuromotor and Biomechanics Research, University of Houston , Houston , TX , USA
| | - Charles S Layne
- a Department of Health and Human Performance , University of Houston , Houston , TX , USA ;,b Center for Neuromotor and Biomechanics Research, University of Houston , Houston , TX , USA ;,c Center for Neuro-Engineering and Cognitive Science , University of Houston , Houston , TX , USA
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Techniques and Methods for Testing the Postural Function in Healthy and Pathological Subjects. BIOMED RESEARCH INTERNATIONAL 2015; 2015:891390. [PMID: 26640800 PMCID: PMC4659957 DOI: 10.1155/2015/891390] [Citation(s) in RCA: 266] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/05/2015] [Accepted: 10/21/2015] [Indexed: 12/15/2022]
Abstract
The different techniques and methods employed as well as the different quantitative and qualitative variables measured in order to objectify postural control are often chosen without taking into account the population studied, the objective of the postural test, and the environmental conditions. For these reasons, the aim of this review was to present and justify the different testing techniques and methods with their different quantitative and qualitative variables to make it possible to precisely evaluate each sensory, central, and motor component of the postural function according to the experiment protocol under consideration. The main practical and technological methods and techniques used in evaluating postural control were explained and justified according to the experimental protocol defined. The main postural conditions (postural stance, visual condition, balance condition, and test duration) were also analyzed. Moreover, the mechanistic exploration of the postural function often requires implementing disturbing postural conditions by using motor disturbance (mechanical disturbance), sensory stimulation (sensory manipulation), and/or cognitive disturbance (cognitive task associated with maintaining postural balance) protocols. Each type of disturbance was tackled in order to facilitate understanding of subtle postural control mechanisms and the means to explore them.
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Naka M, Fujiwara K, Kiyota N. Postural responses to various frequencies of vibration of the triceps surae and forefoot sole during quiet standing. Perception 2015; 44:39-51. [PMID: 26489215 DOI: 10.1068/p7738] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The purpose of this study was to determine the role of somatosensory input to the sensory reference system in quiet standing. We applied vibration (0.5 mm amplitude, 1-60 Hz) to the triceps surae and the forefoot sole to stimulate the muscle spindles and the mechanoreceptors, respectively, and evaluated postural responses. Thirteen young healthy adults who showed backward-lean and forward-lean responses to vibration at high and low frequencies, respectively, participated in the full experiment. The lowest vibration frequencies inducing backward-lean responses (B-LF) were 15-55 Hz for the triceps surae and 16-60 Hz for the forefoot sole. The highest frequencies inducing forward-lean responses (F-HF) were 3-18 Hz for the triceps surae and 1-20 Hz for the forefoot sole. When vibration was simultaneously applied to the triceps surae and forefoot sole at F-HF, no response was induced in 70% of trials. A forward-lean response was induced in the remaining 30% of trials. Simultaneous vibration of the triceps surae and forefoot sole at B-LF induced backward-lean responses in all trials. All postural responses occurred 0.5-4.3 s after vibration onset. Postural responses to high-frequency vibration conceivably occur as a compensatory movement to the illusionary perception that standing position is deviating forward from quiet standing, which must be a reference position. Postural responses to low-frequency vibration possibly occur to equalize the positional information that is received from the triceps surae and the forefoot sole. Both postural responses are likely to involve the sensory reference system, which is located in the supraspinal nervous system.
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Ito T, Sakai Y, Nakamura E, Yamazaki K, Yamada A, Sato N, Morita Y. Relationship between paraspinal muscle cross-sectional area and relative proprioceptive weighting ratio of older persons with lumbar spondylosis. J Phys Ther Sci 2015; 27:2247-51. [PMID: 26311962 PMCID: PMC4540857 DOI: 10.1589/jpts.27.2247] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 04/13/2015] [Indexed: 01/27/2023] Open
Abstract
[Purpose] The purpose of this study was to examine the relationship between the
paraspinal muscle cross-sectional area and the relative proprioceptive weighting ratio
during local vibratory stimulation of older persons with lumbar spondylosis in an upright
position. [Subjects] In all, 74 older persons hospitalized for lumbar spondylosis were
included. [Methods] We measured the relative proprioceptive weighting ratio of postural
sway using a Wii board while vibratory stimulations of 30, 60, or 240 Hz were applied to
the subjects’ paraspinal or gastrocnemius muscles. Back strength, abdominal muscle
strength, and erector spinae muscle (L1/L2, L4/L5) and lumbar multifidus (L1/L2, L4/L5)
cross-sectional areas were evaluated. [Results] The erector spinae muscle (L1/L2)
cross-sectional area was associated with the relative proprioceptive weighting ratio
during 60Hz stimulation. [Conclusion] These findings show that the relative proprioceptive
weighting ratio compared to the erector spinae muscle (L1/L2) cross-sectional area under
60Hz proprioceptive stimulation might be a good indicator of trunk proprioceptive
sensitivity.
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Affiliation(s)
- Tadashi Ito
- Division of Physical Therapy, Department of Health Science, Graduate School of International University of Health and Welfare, Japan ; National Center for Geriatrics and Gerontology, Japan
| | | | | | - Kazunori Yamazaki
- Faculty of Clinical Engineering, School of Health Sciences, Fujita Health University, Japan
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Rand TJ, Myers SA, Kyvelidou A, Mukherjee M. Temporal Structure of Support Surface Translations Drive the Temporal Structure of Postural Control During Standing. Ann Biomed Eng 2015; 43:2699-707. [PMID: 25994281 DOI: 10.1007/s10439-015-1336-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 05/12/2015] [Indexed: 11/30/2022]
Abstract
A healthy biological system is characterized by a temporal structure that exhibits fractal properties and is highly complex. Unhealthy systems demonstrate lowered complexity and either greater or less predictability in the temporal structure of a time series. The purpose of this research was to determine if support surface translations with different temporal structures would affect the temporal structure of the center of pressure (COP) signal. Eight healthy young participants stood on a force platform that was translated in the anteroposterior direction for input conditions of varying complexity: white noise, pink noise, brown noise, and sine wave. Detrended fluctuation analysis was used to characterize the long-range correlations of the COP time series in the AP direction. Repeated measures ANOVA revealed differences among conditions (p < 0.001). The less complex support surface translations resulted in a less complex COP compared to normal standing. A quadratic trend analysis demonstrated an inverted-u shape across an increasing order of predictability of the conditions (p < 0.001). The ability to influence the complexity of postural control through support surface translations can have important implications for rehabilitation.
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Affiliation(s)
- Troy J Rand
- University of Nebraska at Omaha, Biomechanics Research Building #210, Omaha, NE, 68182-0216, USA
| | - Sara A Myers
- University of Nebraska at Omaha, Biomechanics Research Building #210, Omaha, NE, 68182-0216, USA
| | - Anastasia Kyvelidou
- University of Nebraska at Omaha, Biomechanics Research Building #210, Omaha, NE, 68182-0216, USA
| | - Mukul Mukherjee
- University of Nebraska at Omaha, Biomechanics Research Building #210, Omaha, NE, 68182-0216, USA.
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Mettler A, Chinn L, Saliba SA, McKeon PO, Hertel J. Balance training and center-of-pressure location in participants with chronic ankle instability. J Athl Train 2015; 50:343-9. [PMID: 25562457 DOI: 10.4085/1062-6050-49.3.94] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
CONTEXT Chronic ankle instability (CAI) occurs in some people after a lateral ankle sprain and often results in residual feelings of instability and episodes of the ankle's giving way. Compared with healthy people, patients with CAI demonstrated poor postural control and used a more anteriorly and laterally positioned center of pressure (COP) during a single-limb static-balance task on a force plate. Balance training is an effective means of altering traditional COP measures; however, whether the overall location of the COP distribution under the foot also changes is unknown. OBJECTIVE To determine if the spatial locations of COP data points in participants with CAI change after a 4-week balance-training program. DESIGN Randomized controlled trial. SETTING Laboratory. PATIENTS OR OTHER PARTICIPANTS Thirty-one persons with self-reported CAI. INTERVENTION(S) Participants were randomly assigned to a 4-week balance-training program or no balance training. MAIN OUTCOME MEASURE(S) We collected a total of 500 COP data points while participants balanced using a single limb on a force plate during a 10-second trial. The location of each COP data point relative to the geometric center of the foot was determined, and the frequency count in 4 sections (anteromedial, anterolateral, posteromedial, posterolateral) was analyzed for differences between groups. RESULTS Overall, COP position in the balance-training group shifted from being more anterior to less anterior in both eyes-open trials (before trial = 319.1 ± 165.4, after trial = 160.5 ± 149.5; P = .006) and eyes-closed trials (before trial = 387.9 ± 123.8, after trial = 189.4 ± 102.9; P < .001). The COP for the group that did not perform balance training remained the same in the eyes-open trials (before trial = 214.1 ± 193.3, after trial = 230.0 ± 176.3; P = .54) and eyes-closed trials (before trial = 326.9 ± 134.3, after trial = 338.2 ± 126.1; P = .69). CONCLUSIONS In participants with CAI, the balance-training program shifted the COP location from anterolateral to posterolateral. The program may have repaired some of the damaged sensorimotor system pathways, resulting in a more optimally functioning and less constrained system.
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Pereira MP, Pelicioni PHS, Gobbi LT. The Role of Proprioception in the Sagittal Setting of Anticipatory Postural Adjustments During Gait Initiation. HUMAN MOVEMENT 2015. [DOI: 10.1515/humo-2015-0049] [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] Open
Abstract
AbstractPurpose. Previous studies have studied the role of proprioception on the setting of anticipatory postural adjustments (APA) during gait initiation. However, these studies did not investigate the role of proprioception in the sagittal APA setting. We aimed to investigate the role of proprioception manipulation to induce APA sagittal adaptations on gait initiation. Methods. Fourteen healthy adults performed gait initiation without, and with, vibration applied before movement onset, and during movement. In addition, the effects of two different vibration frequencies (80 and 120Hz) were tested. Vibration was applied bilaterally on the tibialis anterior, rectus femoris and trapezius superior. The first step characteristics, ground reaction forces and CoP behaviour were assessed. Results. Vibration improved gait initiation performance regardless of the moment it was applied. CoP velocity during the initial phase of APA was increased by vibration only when it was applied before movement. When vibration was applied to disturb the movement, no effects on the CoP behaviour were observed. Manipulation of vibration frequency had no effects. Conclusions. Rather than proprioception manipulation, the results suggest that post-vibratory effects and attentional mechanisms were responsible for our results. Taken together, the results show that sagittal APA setting is robust to proprioception manipulation.
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Sensorimotor control during peripheral muscle vibration: an experimental study. J Manipulative Physiol Ther 2014; 38:35-43. [PMID: 25467612 DOI: 10.1016/j.jmpt.2014.10.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 08/01/2014] [Accepted: 08/28/2014] [Indexed: 11/23/2022]
Abstract
OBJECTIVE The aims of this study were to determine whether the application of vibration on a postural lower limb muscle altered the sensorimotor control of its joint as measured by isometric force production parameters and to compare present findings with previous work conducted on trunk muscle. METHODS Twenty healthy adults were asked to reproduce submaximal isometric plantar flexion under 3 different conditions: no vibration and vibration frequencies of 30 and 80 Hz on the soleus muscle. Time to peak torque, variable error, as well as constant error and absolute error in peak torque were calculated and compared across conditions. RESULTS Under vibration, participants were significantly less accurate in the force reproduction task, as they mainly undershot the target torque. Applying an 80-Hz vibration resulted in a significantly higher negative constant error than lower-frequency vibration (30 Hz) or no-vibration condition. Decreases in isometric force production accuracy under vibration influence were also observed in a previous study conducted on trunk muscle. However, no difference in constant error was found between 30- and 80-Hz vibration conditions. CONCLUSION The results suggest that acute soleus muscle vibration interferes with plantar flexion torque generation by distorting proprioceptive information, leading to decreases in accuracy of a force reproduction task. Similar results in an isometric trunk extension force reproduction task were found with vibration applied on erector spinae muscle. However, high-frequency vibration applied on soleus muscle elicited higher force reproduction errors than low-frequency stimulation.
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Pettorossi VE, Schieppati M. Neck proprioception shapes body orientation and perception of motion. Front Hum Neurosci 2014; 8:895. [PMID: 25414660 PMCID: PMC4220123 DOI: 10.3389/fnhum.2014.00895] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 10/20/2014] [Indexed: 12/30/2022] Open
Abstract
This review article deals with some effects of neck muscle proprioception on human balance, gait trajectory, subjective straight-ahead (SSA), and self-motion perception. These effects are easily observed during neck muscle vibration, a strong stimulus for the spindle primary afferent fibers. We first remind the early findings on human balance, gait trajectory, SSA, induced by limb, and neck muscle vibration. Then, more recent findings on self-motion perception of vestibular origin are described. The use of a vestibular asymmetric yaw-rotation stimulus for emphasizing the proprioceptive modulation of motion perception from the neck is mentioned. In addition, an attempt has been made to conjointly discuss the effects of unilateral neck proprioception on motion perception, SSA, and walking trajectory. Neck vibration also induces persistent aftereffects on the SSA and on self-motion perception of vestibular origin. These perceptive effects depend on intensity, duration, side of the conditioning vibratory stimulation, and on muscle status. These effects can be maintained for hours when prolonged high-frequency vibration is superimposed on muscle contraction. Overall, this brief outline emphasizes the contribution of neck muscle inflow to the construction and fine-tuning of perception of body orientation and motion. Furthermore, it indicates that tonic neck-proprioceptive input may induce persistent influences on the subject's mental representation of space. These plastic changes might adapt motion sensitiveness to lasting or permanent head positional or motor changes.
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Affiliation(s)
| | - Marco Schieppati
- Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
- Centro Studi Attività Motorie (CSAM), Fondazione Salvatore Maugeri (IRCSS), Scientific Institute of Pavia, Pavia, Italy
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Duclos NC, Maynard L, Barthelemy J, Mesure S. Postural stabilization during bilateral and unilateral vibration of ankle muscles in the sagittal and frontal planes. J Neuroeng Rehabil 2014; 11:130. [PMID: 25178183 PMCID: PMC4162932 DOI: 10.1186/1743-0003-11-130] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 08/15/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The purpose was to investigate the postural consequences of proprioceptive perturbation of the Triceps Surae and Peroneus Longus muscles. These muscles are known to control posture respectively in the sagittal and frontal planes during standing. METHODS Standard parameters and the time course of center of pressure (CoP) displacements were recorded in 21 young adults, instructed to maintain their balance during tendon vibration. Following 4 s of baseline recording, three types of vibration (80 Hz) were applied for 20 s each on the Peroneus or Achilles tendons, either unilaterally or bilaterally (with eyes shut). The recording continued for a further 24 s after the end of the vibration during the re-stabilization phase. To evaluate the time course of the CoP displacement, each phase of the trial was divided into periods of 4 seconds. Differences between the type of tendon vibration, phases and periods were analyzed using ANOVA. RESULTS During all tendon vibrations, the speed of the CoP increased and a posterior displacement occurred. These changes were greater during Achilles than during Peroneus vibration for each type of vibration and also during bilateral compared with unilateral vibration. All maximal posterior positions occurred at a similar instant (between 12.7 and 14 s of vibration). Only unilateral Achilles vibration led to a significant medio-lateral displacement compared to the initial state. CONCLUSIONS The effect of the proprioceptive perturbation seems to be influenced by the position of the vibrated muscle according to the planes of the musculoskeletal postural organization. The amplitude of the destabilization may be related to the importance of the muscle for postural control. The medial CoP displacement which occurred during unilateral Achilles vibration is not a general reaction to a single-limb perturbation. Proprioceptive input from the non-perturbed leg was not sufficient for the antero-posterior displacement to be avoided; however, it helped to gain stability over time. The non-perturbed limb clearly plays an important role in the restoration of the postural referential, both during and immediately following the end of the vibration. The results demonstrated that at least 16 s of vibration are necessary to induce most postural effects in young adults.
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Affiliation(s)
- Noémie C Duclos
- Aix-Marseille Université, CNRS, ISM UMR 7287, 13288 Marseille, France.
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Baudry S, Duchateau J. Independent modulation of corticospinal and group I afferents pathways during upright standing. Neuroscience 2014; 275:162-9. [PMID: 24952331 DOI: 10.1016/j.neuroscience.2014.06.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/01/2014] [Accepted: 06/04/2014] [Indexed: 11/15/2022]
Abstract
Balance control during upright standing is accompanied by an increased amplitude of motor-evoked potentials (MEP) induced by transcranial magnetic stimulation and a decreased amplitude of the Hoffmann (H) reflex in the soleus muscle. Nonetheless, whether these observations reflect reciprocal adjustments between corticospinal and group I afferents pathways during upright standing remains unknown. To further investigate this question, cathodal transcranial direct current stimulation (c-tDCS) applied over the motor cortex and vibration of Achilles tendons were used to modify the excitability of corticospinal and group I afferent pathways, respectively. MEPs and H reflexes were recorded in the soleus muscle during upright standing with or without bilateral Achilles tendon vibration, these recordings being performed before and after 20 min of c-tDCS (1.5 mA) or sham stimulation applied over the sensorimotor cortex. The results indicate that tendon vibration increased MEP amplitude (+28%) and decrease (-68%) the H-reflex amplitude (p<0.05). After c-tDCS, MEP amplitude was reduced by 13% and 26% without and with tendon vibration (p<0.05), respectively. In contrast, no significant change occurred in H-reflex amplitude after c-tDCS. Regardless of the conditions (c-tDCS and tendon vibration), no significant correlation was observed between changes in MEP and H-reflex amplitudes. The results failed to demonstrate close reciprocal changes in soleus MEP and H-reflex amplitudes during upright standing. These original findings suggest independent adjustments in corticospinal and group I afferents pathways during upright standing.
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Affiliation(s)
- S Baudry
- Laboratory of Applied Biology, Neuroscience Institute, Université Libre de Bruxelles (ULB), 808 route de Lennik, 1070 Brussels, Belgium.
| | - J Duchateau
- Laboratory of Applied Biology, Neuroscience Institute, Université Libre de Bruxelles (ULB), 808 route de Lennik, 1070 Brussels, Belgium
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Maitre J, Jully JL, Gasnier Y, Paillard T. Chronic physical activity preserves efficiency of proprioception in postural control in older women. ACTA ACUST UNITED AC 2014; 50:811-20. [PMID: 24203543 DOI: 10.1682/jrrd.2012.08.0141] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The purpose of this study was to compare the effects of proprioceptive disruption on postural control for participants of different ages according to their physical and/or sport activity levels. Two groups of young and old participants who practiced chronic physical and/or sport activities (young active [n = 17; average age 20.5 +/- 1.1 yr] and old active [n = 17; average age 74.0 +/- 3.8 yr]) and two groups of young and old participants who did not practice physical and/or sport activities (young sedentary [n = 17; average age 20.0 +/- 1.3 yr] and old sedentary [n = 17; average age 74.7 +/- 6.3 yr]) participated in the study. They were compared in a bipedal quiet stance reference condition and a bilateral Achilles tendon vibration condition. Center of foot pressure displacements and frequency analysis were compared between the groups. The results indicated that when proprioceptive information was disrupted, the postural control disturbance was more important for the old sedentary group than for the other groups. There were no differences between the old active group and the young sedentary group. Postural control was less altered for the young active group than for the other groups. Aging decreases the efficiency of postural control regardless of the assessment conditions. Physical and sport activities may compensate for the disturbing effects of proprioceptive perturbation through a better use of sensory information whatever the age of the participants.
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Affiliation(s)
- Julien Maitre
- Laboratoire Activité Physique, Performance et Santeé, EA 4445, Université de Pau et des Pays de l'Adour, Département STAPS, Tarbes, France
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McKay SM, Wu J, Angulo-Barroso RM. Effect of Achilles tendon vibration on posture in children. Gait Posture 2014; 40:32-7. [PMID: 24613462 DOI: 10.1016/j.gaitpost.2014.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 01/31/2014] [Accepted: 02/07/2014] [Indexed: 02/02/2023]
Abstract
This study investigated the effect of unilateral Achilles tendon vibration on postural response in children and young adults during standing. Thirty healthy subjects participated in this study including ten 6-year-old children (YC group), ten 10-year-old children (OC group), and ten young adults (YA group). Eight-second vibration was elicited in each trial from a small vibrator attached above the right Achilles tendon when participants stood barefoot on a force platform. Three 40-s trials were collected under both eyes-open and eyes-closed conditions. Center of pressure (COP) was calculated to examine postural response during the pre-vibration, vibration and post-vibration phases. Results show that both the YC and OC groups had a greater COP average velocity than the YA group in all three phases. Tendon vibration induced a directionally specific postural response in all three groups such that the onset of vibration induced a posterior and medial COP shift during the vibration phase, and the offset of vibration induced an anterior and lateral COP shift during the post-vibration phase. Timing of the maximal COP shift was comparable among three groups in both anterior-posterior (AP) and medial-lateral (ML) directions. However, only the OC group showed an adult-like magnitude of the maximal COP shift during the post-vibration phase in the AP direction. These results suggest that 6-year-old children may start showing an adult-like directionally specific response and temporal parameter to tendon vibration during standing; however, the development of an adult-like spatial postural response to tendon vibration may take more than 10 years.
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Affiliation(s)
- Sandra M McKay
- Centre for Studies in Aging, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Jianhua Wu
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA, USA.
| | - Rosa M Angulo-Barroso
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA; INEFC, Department of Health and Applied Sciences, University of Barcelona, Barcelona, Spain
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Piecha M, Juras G, Król P, Sobota G, Polak A, Bacik B. The effect of a short-term and long-term whole-body vibration in healthy men upon the postural stability. PLoS One 2014; 9:e88295. [PMID: 24520362 PMCID: PMC3919744 DOI: 10.1371/journal.pone.0088295] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 01/06/2014] [Indexed: 11/30/2022] Open
Abstract
The study aimed to establish the short-term and long-term effects of whole-body vibration on postural stability. The sample consisted of 28 male subjects randomly allocated to four comparative groups, three of which exercised on a vibration platform with parameters set individually for the groups. The stabilographic signal was recorded before the test commenced, after a single session of whole-body vibration, immediately after the last set of exercises of the 4-week whole-body vibration training, and one week after the training ended. The subjects were exposed to vibrations 3 times a week for 4 weeks. Long-term vibration training significantly shortened the rambling and trembling paths in the frontal plane. The path lengths were significantly reduced in the frontal plane one week after the training end date. Most changes in the values of the center of pressure (COP) path lengths in the sagittal and frontal plane were statistically insignificant. We concluded that long-term vibration training improves the postural stability of young healthy individuals in the frontal plane.
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Affiliation(s)
- Magdalena Piecha
- Department of Physiotherapy Basics, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
- * E-mail:
| | - Grzegorz Juras
- Department of Human Motor Behavior, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Piotr Król
- Department of Physiotherapy Basics, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Grzegorz Sobota
- Department of Human Motor Behavior, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Anna Polak
- Department of Physiotherapy Basics, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Bogdan Bacik
- Department of Human Motor Behavior, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
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Han JT, Lee MH, Lee KH. Effects of Local Muscle Vibration on the Displacement of Center of Pressure during Quiet Standing. J Phys Ther Sci 2014; 25:1643-5. [PMID: 24409039 PMCID: PMC3885858 DOI: 10.1589/jpts.25.1643] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 07/22/2013] [Indexed: 12/02/2022] Open
Abstract
[Purpose] The purpose of this study was to investigate the effect of local vibration
stimuli on body balance (trace area, trace length, and velocity) in healthy adults during
double-leg standing. [Subjects and Methods] Thirty-nine subjects (10 male, 29 female)
participated in this study. They were asked to keep their balance while holding four
positions: standing with their eyes open, with and without vibration stimuli, and standing
with their eyes closed, with and without vibration stimuli. The vibration stimuli, which
had a duration of 30 sec, and a frequency of 60–80 Hz, were applied to the tibialis
anterior and gastrocnemius muscle belly during double-leg standing. Balance measurement
was performed using the Balance Trainer 4 (HUR Labs Oy, Tampere, Finland). All subjects
provided informed consent prior to participation in this study. [Results] In the open-eyes
position, there were no significant differences in trace area, trace length, and velocity
of the center of pressure (COP) either with or without vibration stimuli. However, in the
closed-eyes position, the vibration stimuli significantly decreased trace area, trace
length, and velocity of the COP compared with when no vibration stimuli were applied.
[Conclusion] These results suggest that vibration stimuli applied to the lower leg improve
balance when a person’s eyes are closed during double-leg quiet standing.
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Affiliation(s)
- Jin Tae Han
- Department of Physical Therapy, College of Science, Kyungsung University, Republic of Korea
| | - Myoung Hee Lee
- Department of Physical Therapy, College of Science, Kyungsung University, Republic of Korea
| | - Keun Hee Lee
- Lee Keun Hee's Pediatric Development Research Institute, Republic of Korea
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Kurokawa N, Fujiwara K, Kiyota N. Postural responses accompanying Achilles tendon vibration stimulation during various phases of sit-to-stand movement. Perception 2013; 42:778-89. [PMID: 24344553 DOI: 10.1068/p7470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The aim of this study was to determine the postural response accompanying Achilles tendon vibration stimulation during various phases of the sit-to-stand movement. Twelve healthy young adults performed the sit-to-stand movement in response to an auditory signal 2 s after a first one. Vibration stimulation with a 100 Hz frequency was applied to both Achilles tendons during the following phases: (1) 10 s of sitting before standing up; (2) 10 s plus a period until the standing position was achieved; and (3) 5 s after standing. The postural response after standing was analyzed with the center of foot pressure in the anteroposterior direction. Forward-leaning responses were identified in 78.3% and 63.3% of trials under conditions 1 and 2, respectively. Backward-leaning responses were identified in 93.3% of the trials under condition 3. Response latency (+/- standard deviation) was significantly longer under conditions 1 and 2 than under condition 3 (1: 872 +/- 576, 2: 1026 +/- 542, and 3:555 +/- 322 ms; ps < 0.05). Sensory information at the standing point might be anticipated based on sensory information received while sitting. Consequently, postural response as a compensatory movement would occur via the sensory reference system within the supraspinal nervous system.
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Affiliation(s)
- Nozomi Kurokawa
- Department of Physical Therapy, Gumma Paz College, 1-7-1 Tonya-machi, Takasaki 370-0006, Japan
| | - Katsuo Fujiwara
- Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-8640, Japan
| | - Naoe Kiyota
- Department of Rehabilitation Science, Osaka Health Science University, 1-9-27 Tenma, Kita-ku, Osaka 530-0043, Japan
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Achilles tendon vibration shifts the center of pressure backward in standing and forward in sitting in young subjects. Neurophysiol Clin 2013; 43:237-42. [DOI: 10.1016/j.neucli.2013.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 03/17/2013] [Accepted: 06/23/2013] [Indexed: 11/22/2022] Open
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Lee SW, Cho KH, Lee WH. Effect of a local vibration stimulus training programme on postural sway and gait in chronic stroke patients: a randomized controlled trial. Clin Rehabil 2013; 27:921-31. [DOI: 10.1177/0269215513485100] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective: To investigate the effect of a local vibration stimulus training programme on postural sway and gait in stroke patients. Design: A randomized controlled trial with two groups: a local vibration stimulus training programme group and a sham group. Setting: Inpatient rehabilitation centre. Subjects: Thirty-one chronic stroke patients. Interventions: Both groups underwent a standard rehabilitation programme. The local vibration stimulus training programme group ( n = 16) participated in the local vibration stimulus training programme for 30 minutes a day, five times a week, for six weeks. The sham group ( n = 15) participated in a sham local vibration stimulus training programme for 30 minutes a day, five times a week, for six weeks. Main measures: A forceplate was used to measure postural sway under two conditions: standing with eyes open and eyes closed. Gait ability was measured using the GAITRite system. Results: In postural sway, greater improvements in the postural sway distance with eyes-open (–11.91 vs. 0.80) and eyes-closed (–20.67 vs. –0.34) conditions and postural sway velocity with eyes-open (–0.40 vs. 0.03) and eyes-closed (–0.69 vs. –0.01) conditions were observed in the local vibration stimulus training programme group, compared with the sham group ( P < 0.05). In gait ability, greater improvement in gait speed (15.06 vs. 2.85), cadence (8.46 vs. 1.55), step length (7.90 vs. 3.64), and single limb support time (0.12 vs. 0.01) were observed in the local vibration stimulus training programme group, compared with the sham group ( P < 0.05). Conclusions: These findings suggest that local vibration stimulus training programme is an effective method for improvement of the postural sway and gait ability of chronic stroke patients.
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Affiliation(s)
- Se-Won Lee
- Department of Physical Therapy, Sahmyook University, Republic of Korea
| | - Ki-Hun Cho
- Department of Physical Therapy, Sahmyook University, Republic of Korea
| | - Wan-Hee Lee
- Department of Physical Therapy, Sahmyook University, Republic of Korea
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42
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Abstract
Cutaneous information from joints has been attributed proprioceptive properties similar to those of muscle spindles. This study aimed to assess whether vibration-induced changes in torso cutaneous information contribute to whole-body postural reorganization in humans. Ten healthy young adults stood in normal and Romberg stances with six vibrating actuators positioned on the torso in contact with the skin over the left and right external oblique, internal oblique, and erector spinae muscle locations at the L4/L5 vertebrae level. Vibrations around the torso were randomly applied at two locations simultaneously (covibration) or at all locations simultaneously. Kinematic analysis of the body segments indicated that covibration applied to the skin over the internal oblique muscles induced shifts of both the head and torso in the anterior direction (torso flexion) while the hips shifted in the posterior direction (ankle plantar flexion). Conversely, covibration applied to the skin over the erector spinae muscle locations produced opposite effects. However, covibration applied to the skin over the left internal oblique and left erector spinae, the right internal oblique and right erector spinae, or at all locations simultaneously did not induce any significant postural changes. In addition, the center of pressure position as measured by the force plate was unaffected by all covibration conditions tested. These results were independent of stance and suggest an integrated and coordinated reorganization of posture in response to vibration-induced changes in cutaneous information. In addition, combinations of vibrotactile stimuli over multiple locations exhibit directional summation properties in contrast to the individual responses we observed in our previous work.
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Hwang JH, Lee CH, Chang HJ, Park DS. Sequential analysis of postural control resource allocation during a dual task test. Ann Rehabil Med 2013; 37:347-54. [PMID: 23869332 PMCID: PMC3713291 DOI: 10.5535/arm.2013.37.3.347] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 08/21/2012] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To investigate the postural control factors influencing the automatic (reflex-controlled) and attentional (high cortical) factors on dual task. METHODS We used a dual task model to examine the attentional factors affecting the control of posture, subjecting test subjects to vibration stimulation, one-leg standing and verbal or nonverbal task trials. Twenty-three young, healthy participants were asked to stand on force plates and their centers of pressure were measured during dual task trials. We acquired 15 seconds of data for each volunteer during six dual task trials involving varying task combinations. RESULTS We observed significantly different sway patterns between the early and late phases of dual task trials, which probably reflect the attentional demands. Vibration stimulation perturbed sway more during the early than the late phases; with or without vibration stimulation, the addition of secondary tasks decreased sway in all phases, and greater decreases in sway were observed in the late phases, when subjects were assigned nonverbal tasks. Less sway was observed during the nonverbal task in a sequential study. CONCLUSION The attentional and automatic factors were analyzed during a sequential study. By controlling the postural control factors, optimal parameters and training methods might be used in clinical applications.
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Affiliation(s)
- Ji Hye Hwang
- Department of Physical Medicine and Rehabilitation, Center for Clinical Research, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Interaction of support surface stability and Achilles tendon vibration during a postural adaptation task. Hum Mov Sci 2013; 32:214-27. [PMID: 23465726 DOI: 10.1016/j.humov.2012.12.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 11/15/2012] [Accepted: 12/06/2012] [Indexed: 11/20/2022]
Abstract
Orchestration of sensory-motor information and adaptation to internal or external, acute or chronic changes is one of the fundamental features of human postural control. The postural control system is challenged on a daily basis, and displays a remarkable ability to adapt to both long and short term challenges. To explore the interaction between support surface stability and Achilles tendon vibration during a period of adaptation we used both a linear measure and a non-linear measure derived from center-of-pressure (COP) data. An equilibrium score (ES), based upon peak amplitude of anterior-posterior sway towards theoretical limits of stability was the linear measure used to assess postural performance. We observed early effects of vibration on postural stability, depending on support characteristics. Participants were able to decrease sway with extended practice over days, independent of support surface stability. Approximate entropy analysis of COP data provided additional information about control adaptation processes.
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El-Tamawy MS, Darwish MH, Khallaf ME. Effects of augmented proprioceptive cues on the parameters of gait of individuals with Parkinson's disease. Ann Indian Acad Neurol 2013; 15:267-72. [PMID: 23349591 PMCID: PMC3548364 DOI: 10.4103/0972-2327.104334] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 04/04/2012] [Accepted: 05/08/2012] [Indexed: 11/18/2022] Open
Abstract
Context: Impairment of initiating sequential movements and processing of proprioception contribute to characteristic Parkinson's disease (PD) gait abnormalities. Many studies have used a single external cue or 2 different cues to correct PD gait. Aim: An aim of this study was to determine the influence of paired proprioceptive cues on gait parameters of individuals with PD. Setting and Design: Double-blind randomized controlled trial. Materials and Methods: Subjects were 30 PD patients who had mild to moderate impairment according to the United Parkinson's Disease Rating Scale (UPDRS). They were randomly assigned to either a routine physiotherapy program or treadmill training with vibratory stimuli applied to the feet plantar surfaces and proprioceptive neuromuscular facilitation (PNF) as well as the same physiotherapy program. All Participants received a 45-minutes session of low intensity physiotherapy program, 3 times a week, for 8 weeks. The duration of treadmill training was 5 minutes at baseline and 25 minutes at the end of treatment. Walking speed and distance were recorded from the treadmill control panel for both groups before and immediately after the end of treatment. The Qualysis ProReflex motion analysis system was used to measure cadence, stride length, hip, knee, and ankle joints’ angular excursion. Results: The cadence, stride length, and lower limb joints’ angular excursion showed a significant improvement in both groups (P ≤ 0.05). These improvements in spatio-temporal parameters and angular excursion were higher in the study group than in the control group (P ≤ 0.05). Conclusion: Potentiated proprioceptive feedback improves parkinsonian gait kinematics, the hip, knee, and ankle joints’ angular excursion.
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Postural control in response to an external perturbation: effect of altered proprioceptive information. Exp Brain Res 2011; 217:197-208. [PMID: 22198575 DOI: 10.1007/s00221-011-2986-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 12/09/2011] [Indexed: 10/14/2022]
Abstract
The purpose of the study was to investigate the role of altered proprioception on anticipatory (APAs) and compensatory (CPAs) postural adjustments and their interaction. Nine healthy adults were exposed to external perturbations induced at the shoulder level while standing with intact or altered proprioception induced by bilateral Achilles tendon vibration. Visual information was altered (eyes open or closed) in both the conditions. Electrical activity of eight trunk and leg muscles and center of pressure (COP) displacements were recorded and quantified within the time intervals typical for APAs and CPAs. The results showed that when proprioceptive information was altered in eyes-open conditions, anticipatory muscle activity was delayed. Moreover, altered proprioceptive information resulted in smaller magnitudes of compensatory muscle activity as well as smaller COP displacements after the perturbation in both eyes-open and eyes-closed conditions. The outcome of the study provides information on the interaction between APAs and CPAs in the presence of altered proprioception.
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47
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Hazime FA, Allard P, Ide MR, Siqueira CM, Amorim CF, Tanaka C. Postural control under visual and proprioceptive perturbations during double and single limb stances: insights for balance training. J Bodyw Mov Ther 2011; 16:224-9. [PMID: 22464121 DOI: 10.1016/j.jbmt.2011.02.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 02/21/2011] [Accepted: 02/24/2011] [Indexed: 10/18/2022]
Abstract
Single Limb Stance under visual and proprioceptive disturbances is largely used in clinical settings in order to improve balance in a wide range of functional disabilities. However, the proper role of vision and proprioception in SLS is not completely understood. The objectives of this study were to test the hypotheses that when ankle proprioception is perturbed, the role of vision in postural control increases according to the difficulty of the standing task. And to test the effect of vision during postural adaptation after withdrawal of the somesthetic perturbation during double and single limb stance Eleven males were submitted to double (DLS) and single limb (SLS) stances under conditions of normal or reduced vision, both with normal and perturbed proprioception. Center of pressure parameters were analyzed across conditions. Vision had a main effect in SLS, whereas proprioception perturbation showed effects only during DLS. Baseline stability was promptly achieved independently of visual input after proprioception reintegration. In conclusion, the role of vision increases in SLS. After proprioception reintegration, vision does not affect postural recovery. Balance training programs must take that into account.
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Affiliation(s)
- Fuad A Hazime
- Division of Rheumatology, School of Medicine, University of São Paulo, Brazil
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48
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Effects of plantar cutaneo-muscular and tendon vibration on posture and balance during quiet and perturbed stance. Hum Mov Sci 2011; 30:153-71. [DOI: 10.1016/j.humov.2010.04.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 03/09/2010] [Accepted: 04/26/2010] [Indexed: 11/16/2022]
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Turnock MJE, Layne CS. Variations in linear and nonlinear postural measurements under achilles tendon vibration and unstable support-surface conditions. J Mot Behav 2010; 42:61-9. [PMID: 20018587 DOI: 10.1080/00222890903397103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Reduced support-surface stability has been shown to attenuate the effect of Achilles tendon vibration on backward body displacement. In the present study, 20 participants performed a quiet, upright standing task on a stable and sway-referenced support, with and without vibration. The authors calculated equilibrium scores (ES), approximate entropy (ApEn), and mean and peak power spectral density frequencies of center-of-pressure variations. It was found that ES values decreased with the addition of vibration and in the sway-referenced support condition. ApEn values decreased with the addition of vibration but only with a stable support. Conversely, mean and peak frequencies increased with the addition of vibration, independent of support stability. These results suggest that the role of ankle proprioceptive input changes depending on support-surface characteristics and demonstrate the value of using both linear and nonlinear measures of postural sway.
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Affiliation(s)
- Matthew J E Turnock
- International Space University, Department of Health and Human Performance, Center for Neuromotor and Biomechanics Research, University of Houston, Houston, Texas 77004, USA
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50
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Patel M, Modig F, Magnusson M, Fransson PA. Alcohol intoxication at 0.06 and 0.10% blood alcohol concentration changes segmental body movement coordination. Exp Brain Res 2010; 202:431-43. [PMID: 20076951 DOI: 10.1007/s00221-009-2150-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Accepted: 12/16/2009] [Indexed: 12/19/2022]
Abstract
Alcohol intoxication is the cause of many falls requiring emergency care. The control of upright standing balance is complex and comprises contributions from several partly independent mechanisms like coordination, feedback and feedforward control and adaptation. Analysis of the segmental body movement coordination offers one option to detect the severity of balance problems. The study aims were (1) to investigate whether alcohol intoxication at 0.06 and 0.10% blood alcohol concentration (BAC) affected the segmental movement pattern under unperturbed and perturbed standing; (2) whether alcohol affected the ability for movement pattern adaptation; (3) whether one's own subjective feeling of drunkenness correlated to the movement pattern used. Twenty-five participants (13 women and 12 men, mean age 25.1 years) performed tests involving alcohol intoxication. Body movements were recorded at five locations (ankle, knee, hip, shoulder and head) during quiet standing and pseudorandom pulses of calf muscle vibration for 200 s with eyes closed or open. There was no significant effect of alcohol on the general movement pattern in unperturbed stance or on adaptation. However, when balance was repeatedly perturbed, knee movements became significantly less correlated to other body movements over time at 0.10% BAC and when visual information was unavailable, suggesting that the normal movement pattern could not be maintained for a longer period of time while under 0.10% BAC intoxication. Subjective feelings of drunkenness correlated often with a changed upper body movement pattern but less so with changed knee movements. Thus, an inability to relate drunkenness with changed knee movements may be a contributing factor to falls in addition to the direct effect of alcohol intoxication.
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Affiliation(s)
- M Patel
- Department of Clinical Sciences, Lund, Lund University, 221 85 Lund, Sweden
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