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Scalona E, De Marco D, Ferrari L, Creatini I, Taglione E, Andreoni G, Fabbri-Destro M, Avanzini P, Lopomo NF. Identification of movement phenotypes from occupational gesture kinematics: Advancing individual ergonomic exposure classification and personalized training. APPLIED ERGONOMICS 2024; 115:104182. [PMID: 38000137 DOI: 10.1016/j.apergo.2023.104182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/10/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023]
Abstract
The identification of personalized preventive strategies plays a major role in contrasting the occurrence of work-related musculoskeletal disorders. This requires the identification of distinct movement patterns within large samples and the attribution of a proper risk level to each identified movement phenotype. We assessed the feasibility of this approach by exploiting wearable inertial measurement units to estimate the whole-body kinematics of 43 healthy participants performing 18 reach-to-manipulate movements, which differed based on the object's position in the space and the type of manipulation required. Through unsupervised clustering, we identified multiple movement phenotypes graded by ergonomic performance. Furthermore, we determined which joints mostly contributed to instantiating the ergonomic differences across clusters, emphasizing the importance of monitoring this aspect during occupational gestures. Overall, our analysis suggests that movement phenotypes can be identified within occupational motor repertoires. Assigning individual performance to specific phenotypes has the potential to inform the development of more effective and tailored interventions.
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Affiliation(s)
- Emilia Scalona
- Dipartimento di Scienze Medico Chirurgiche, Scienza Radiologiche e Sanità Pubblica (DSMC), Università Degli Studi di Brescia, Viale Europa 11, 25123, Brescia, Italy.
| | - Doriana De Marco
- Dipartimento di Medicina e Chirurgia, Università Degli Studi di Parma, Parma, Italy
| | - Laura Ferrari
- Consiglio Nazionale Delle Ricerche, Istituto di Neuroscienze, Parma, Italy; School of Advanced Studies, Università di Camerino, Camerino, Italy
| | | | - Elisa Taglione
- Centro di Riabilitazione Motoria, INAIL, Volterra, Italy
| | | | | | - Pietro Avanzini
- Consiglio Nazionale Delle Ricerche, Istituto di Neuroscienze, Parma, Italy
| | - Nicola Francesco Lopomo
- Consiglio Nazionale Delle Ricerche, Istituto di Neuroscienze, Parma, Italy; Dipartimento di Ingegneria Dell'Informazione, Università Degli Studi di Brescia, Brescia, Italy
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2
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Watanabe R, Higuchi T. Anticipatory action planning for stepping onto competing potential targets. Front Hum Neurosci 2022; 16:875249. [PMID: 36072888 PMCID: PMC9441706 DOI: 10.3389/fnhum.2022.875249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 08/02/2022] [Indexed: 12/05/2022] Open
Abstract
The brain plans an anticipatory action for performing tasks successfully and effortlessly even if there are multiple possible options. There is increasing evidence that, when multiple actions are possible, the brain considers two factors when planning an anticipatory action-the probabilistic value and the action cost for each potential action. When the action involves maintaining upright balance, such as standing, stepping, or walking, the action cost for maintaining postural stability could be considered dominantly. We addressed this issue by using a "go-before-you-know" task to step onto a target on the floor. In this task, two potential targets were located on the medial or lateral side of the stepping foot, and the true target was cued only after participants shifted their loads to leave that foot. Participants initiated their stepping actions without knowing which of the potential targets would be the true one. The results showed that, for the majority of participants, lateral displacements of the center of pressure (COP) with two potential targets were similar to those when a single target exists on the individual's medial side. Given that mediolateral postural stability became more destabilized with stepping onto the medial target than stepping onto the lateral target, they were likely to plan their mediolateral components of the postural adjustments for the worst-case scenario (i.e., falling). Additionally, posterior COP movements with two potential targets became smaller than those with a single target, suggesting an effort to create extra time to determine the true target and to adjust the swing foot. Based on these findings, we concluded that action costs for maintaining postural stability were considered dominantly for planning an anticipatory action to accomplish a stepping task successfully while ensuring upright balance.
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Affiliation(s)
- Ryo Watanabe
- Department of Health Promotion Sciences, Tokyo Metropolitan University, Tokyo, Japan
- Research Fellow, Japan Society for the Promotion of Science, Tokyo, Japan
| | - Takahiro Higuchi
- Department of Health Promotion Sciences, Tokyo Metropolitan University, Tokyo, Japan
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Duarte MB, da Costa Moraes AA, Ferreira EV, da Silva Almeida GC, da Rocha Santos EG, Pinto GHL, de Oliveira PR, Amorim CF, Dos Santos Cabral A, Saunier G, Costa E Silva ADA, Belgamo A, Souza GDS, Callegari B. Validity and reliability of a smartphone-based assessment for anticipatory and compensatory postural adjustments during predictable perturbations. Gait Posture 2022; 96:9-17. [PMID: 35533431 DOI: 10.1016/j.gaitpost.2022.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 04/26/2022] [Accepted: 05/02/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Postural adjustments involve displacements of the center of mass (COM), controlled by the central nervous system (CNS), to maintain equilibrium whilst standing. Postural adjustments can be anticipatory (APAs) or compensatory (CPAs), and are triggered to counteract predictable perturbations. RESEARCH QUESTION Is the new smartphone application, Momentum, a valid and reliable tool for the assessment of body balance, by measuring APAs and CPAs using accelerometer readings? METHODS 20 young adults were exposed to external predictable perturbations induced at the shoulder level, whilst standing. COM linear acceleration was recorded by Momentum (extracting data from a smartphone's accelerometer) and a 3D motion capture system. RESULTS The key results demonstrated a very high, significant correlation (r ≥ 0.7, p < 0.05) between the two device settings in the APA parameters, which obtained r = 0.65, denoting a high correlation. Considering the reliability, variables that are compensatory in nature are presented on a scale of good to excellent in measurement methods, kinematics, and Momentum. However, the anticipatory variables presented excellent reliability only for the kinematics. SIGNIFICANCE These experiments show that Momentum is a valid method for measuring COM acceleration under predictable perturbations and is reliable for compensatory events.
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Affiliation(s)
- Manuela Brito Duarte
- Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil.
| | | | - Eduardo Veloso Ferreira
- Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil.
| | | | - Enzo Gabriel da Rocha Santos
- Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, R. Augusto Corrêa, 01, Belém 66093-020, PA, Brazil
| | - Gustavo Henrique Lima Pinto
- Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, R. Augusto Corrêa, 01, Belém 66093-020, PA, Brazil
| | - Paulo Rui de Oliveira
- Doctoral and Masters Program in Physical Therapy, UNICID, 448/475 Cesário Galeno St., São Paulo, SP, Brazil.
| | - César Ferreira Amorim
- Doctoral and Masters Program in Physical Therapy, UNICID, 448/475 Cesário Galeno St., São Paulo, SP, Brazil; Département des Sciences de la Santé, Programme de physiothérapie de l'université McGill offert en extension à l'UQAC, Saguenay, Québec, Canada; Physical Therapy and Neuroscience Departments, Wertheims' Colleges of Nursing and Health Sciences and Medicine, Florida International University (FIU), Miami, FL, United States
| | - André Dos Santos Cabral
- Centro de Ciências Biológicas e da Saúde, Universidade do Estado do Pará, Tv. Perebebuí, 2623 - Marco, Belém, PA 66087-662, Brazil.
| | - Ghislain Saunier
- Laboratório de Cognição Motora, Departamento de Anatomia, Universidade Federal do Pará, Rua Augusto Corrêa 01, Belém 66075-110, PA, Brazil.
| | - Anselmo de Athayde Costa E Silva
- Programa de Pós Graduação em Ciências do Movimento, Universidade Federal do Pará, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil.
| | - Anderson Belgamo
- Departamento de Ciência da Computação, Instituto Federal de São Paulo, Piracicaba, Brazil.
| | - Givago da Silva Souza
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa 01, Belém 66075-110, PA, Brazil.
| | - Bianca Callegari
- Laboratório de Estudos da Motricidade Humana, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil; Programa de Pós Graduação em Ciências do Movimento, Universidade Federal do Pará, Av. Generalíssimo deodoro 01, Belém 66073-00, PA, Brazil.
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Giangiardi VF, Perracini MR, da Silva ML, Setti GBR, Curzio LE, Vegas M, Alouche SR. Functional Outcomes Associated With Independence in Walking Among People With Hereditary Ataxias: An Exploratory Cross-sectional Study. Phys Ther 2022; 102:6506304. [PMID: 35079839 DOI: 10.1093/ptj/pzac006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 08/14/2021] [Accepted: 11/21/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVE This study aimed to identify functional outcomes related to independence in walking among people affected by hereditary ataxias. METHODS Sixty participants were selected by convenience in a list provided by an organization of people with ataxia. Sociodemographic and clinical data were collected using a semistructured questionnaire. The Assessment and Rating of Ataxia was used to assess and rate cerebellar ataxia. Changes in body structure and function, limitation in activities, and restriction in participation were evaluated with specific outcome measures. Participants were classified as independent in walking if they were able to walk without walking aids or human assistance and as dependent in walking if they have been using walking aids (sticks, crutches, or walkers) for more than 6 months, using a wheelchair for locomotion most of the day, or both. Multivariate logistic regression analyses were conducted hierarchically and in blocks considering upper limbs function, balance systems, sensory functions, postural control, walking, independence, cognition, and perception as independent variables. The prevalence ratio for walking independence was determined. RESULTS The final regression model pointed out that gait capacity assessed by the 6-Minute Walk Test and dexterity assessed by the Box and Blocks test were the main markers related to walking independence in individuals with hereditary ataxias. CONCLUSION The distance covered in 6 minutes of walking (walking endurance) and upper extremity dexterity can be used to better assess the progression of cerebellar disease related to walking independence in individuals with hereditary ataxias. IMPACT This study supports early detection of individuals who are at risk of loss of walking independence and an optimized rehabilitation plan.
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Affiliation(s)
- Vivian Farahte Giangiardi
- Master's and Doctoral Program in Physical Therapy, Universidade Cidade de São Paulo, São Paulo, SP, Brazil
| | - Monica Rodrigues Perracini
- Master's and Doctoral Program in Physical Therapy, Universidade Cidade de São Paulo, São Paulo, SP, Brazil
| | - Maria Liliane da Silva
- Master's and Doctoral Program in Physical Therapy, Universidade Cidade de São Paulo, São Paulo, SP, Brazil
| | | | | | - Milena Vegas
- School of Physical Therapy, Universidade Cidade de São Paulo, São Paulo, SP, Brazil
| | - Sandra Regina Alouche
- Master's and Doctoral Program in Physical Therapy, Universidade Cidade de São Paulo, São Paulo, SP, Brazil
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5
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Kim SH, Shin HJ, Cho HY. Impact of Types of Breathing on Static Balance Ability in Healthy Adults. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19031205. [PMID: 35162227 PMCID: PMC8835336 DOI: 10.3390/ijerph19031205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 12/04/2022]
Abstract
Recent studies have suggested that breathing type may affect balance ability. However, most of these studies were conducted on the elderly and patients with musculoskeletal or neurological disorders. Therefore, the effect of voluntary breathing, such as thoracic and abdominal breathing, on the balance ability of people in various age groups is not clearly understood. The purpose of this study was to investigate the differences in balance ability according to the type of breathing in healthy young adults. This study included 78 healthy, young adults. All subjects were assessed for balance ability in neutral breathing, thoracic breathing, and abdominal breathing through a crossover design. Balance ability was assessed during static standing using a force plate. Participants were trained in voluntary breathing, evaluated using electromyography. During voluntary breathing, sway velocity, anterior-posterior difference, and anterior-posterior standard deviation increased while anterior-posterior sample entropy decreased compared to neutral breathing (p < 0.05). Compared with thoracic breathing, abdominal breathing increased sway velocity and variability, and reduced complexity (p < 0.05). These findings show that balance ability is affected by breathing, even in healthy young adults.
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Affiliation(s)
- Sung-Hyeon Kim
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Korea; (S.-H.K.); (H.-J.S.)
| | - Ho-Jin Shin
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Korea; (S.-H.K.); (H.-J.S.)
| | - Hwi-Young Cho
- Department of Physical Therapy, College of Health Science, Gachon University, Incheon 21936, Korea
- Correspondence: ; Tel.: +82-32-820-4560; Fax: +82-32-820-4449
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6
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Kaewmanee T, Liang H, Aruin AS. The Effect of Predictability of the Perturbation Magnitude on Anticipatory and Compensatory Postural Adjustments during a Bimanual Load-Lifting Task. J Mot Behav 2022; 54:567-576. [PMID: 34986736 DOI: 10.1080/00222895.2021.2024491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Background: To minimize the potential postural disturbance induced by external or self-initiated perturbations, humans generate anticipatory postural adjustments based on their perceived consequences of the body disturbance. Lifting is a common activity that induces a self-initiated perturbation that can compromise balance control. Aim: To assess anticipatory (APAs) and compensatory (CPAs) postural adjustments generated in response to a self-initiated perturbation induced by lifting objects of uncertain mass. Methods: Ten young adults lifted the tray with either light or heavy object placed in it. Electromyographic activity of eight trunk and leg muscles, and center-of-pressure (COP) displacements were recorded and analyzed during the APAs and CPAs phases. Results: When the object mass changed unpredictably, the participants generated APAs based on the most recent experience of lifting and needed three trials of lifting to generate optimal APAs and CPAs. Conclusions: Young adults were able to predict the perturbation magnitude during self-initiated perturbations induced by lifting objects. The outcome provides a foundation for future studies focusing on the role of predictability of perturbation consequences in postural control of older adults and individuals with balance deficit.
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Affiliation(s)
- Tippawan Kaewmanee
- PhD Program in Rehabilitation Sciences, College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Huaqing Liang
- School of Physical Therapy, Marshall University, Huntington, WV, USA
| | - Alexander S Aruin
- PhD Program in Rehabilitation Sciences, College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL, USA.,Department of Physical Therapy, University of Illinois at Chicago, Chicago IL, USA
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7
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Hernandez L, Manning J, Zhang S. Voluntary control of breathing affects center of pressure complexity during static standing in healthy older adults. Gait Posture 2019; 68:488-493. [PMID: 30616178 DOI: 10.1016/j.gaitpost.2018.12.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 12/17/2018] [Accepted: 12/25/2018] [Indexed: 02/02/2023]
Abstract
Background Physiological/biomechanical systems display high degrees of complexity in their corresponding physiological and/or biomechanical outputs, indicative of normal healthy physiological functioning, though little attention has been paid to potential mechanisms which may affect complexity. Center of pressure (CoP) dynamics also display high degrees of complexity and may be affected via altered respiratory-motor interactions such as during voluntary control of breathing. Purpose The purpose of this study was to investigate the differences in the complexity of CoP dynamics during autonomous vs. voluntary control of breathing and between different voluntarily controlled breathing conditions. Methods Center of pressure recordings were taken from 18 older adults during static standing under three different breathing conditions: 1) neutral breathing, 2) abdominal breathing, and 3) thoracic breathing, the first constituting the autonomous breathing condition and the latter two constituting voluntarily controlled breathing conditions. CoP dynamics were quantified using sample entropy, standard deviation, 95% sway area, and average radial velocity. Repeated measure MANOVAs were used to assess the effect of breathing on CoP dynamics, with top-down application of ANOVAs and pairwise comparison as needed. Results Voluntary control of breathing during both conditions resulted in significantly higher CoP variability and lower sample entropy than during autonomous control of breathing in the mediolateral direction, indicating less complex dynamics and loss of system control. No significant differences between voluntary breathing conditions were observed. Conclusion Voluntary control of breathing significantly affected on CoP dynamics during static standing. The complexity of the postural control system may be affected via alterations in respiratory-motor interactions.
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Affiliation(s)
| | | | - Shuqi Zhang
- Northern Illinois University, United States.
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8
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Cotugno G, Konstantinova J, Althoefer K, Nanayakkara T. Modelling the structure of object-independent human affordances of approaching to grasp for robotic hands. PLoS One 2018; 13:e0208228. [PMID: 30586407 PMCID: PMC6306220 DOI: 10.1371/journal.pone.0208228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 11/14/2018] [Indexed: 11/19/2022] Open
Abstract
Grasp affordances in robotics represent different ways to grasp an object involving a variety of factors from vision to hand control. A model of grasp affordances that is able to scale across different objects, features and domains is needed to provide robots with advanced manipulation skills. The existing frameworks, however, can be difficult to extend towards a more general and domain independent approach. This work is the first step towards a modular implementation of grasp affordances that can be separated into two stages: approach to grasp and grasp execution. In this study, human experiments of approaching to grasp are analysed, and object-independent patterns of motion are defined and modelled analytically from the data. Human subjects performed a specific action (hammering) using objects of different geometry, size and weight. Motion capture data relating the hand-object approach distance was used for the analysis. The results showed that approach to grasp can be structured in four distinct phases that are best represented by non-linear models, independent from the objects being handled. This suggests that approaching to grasp patterns are following an intentionally planned control strategy, rather than implementing a reactive execution.
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Affiliation(s)
- Giuseppe Cotugno
- Centre for Robotics Research, Department of Informatics, King’s College London, Strand, WC2R 2LS, London, United Kingdom
| | - Jelizaveta Konstantinova
- Centre for Advanced Robotics @ Queen Mary (ARQ), Faculty of Science and Engineering, Queen Mary University of London, Mile End Road, E1 4NS, London, United Kingdom
| | - Kaspar Althoefer
- Centre for Advanced Robotics @ Queen Mary (ARQ), Faculty of Science and Engineering, Queen Mary University of London, Mile End Road, E1 4NS, London, United Kingdom
| | - Thrishantha Nanayakkara
- Dyson School of Design Engineering, Imperial College London, South Kensington Campus, London, United Kingdom
- * E-mail:
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Kammermeier S, Dietrich L, Maierbeck K, Plate A, Lorenzl S, Singh A, Ahmadi A, Bötzel K. Postural Stabilization Differences in Idiopathic Parkinson's Disease and Progressive Supranuclear Palsy during Self-Triggered Fast Forward Weight Lifting. Front Neurol 2018; 8:743. [PMID: 29403423 PMCID: PMC5786748 DOI: 10.3389/fneur.2017.00743] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 12/22/2017] [Indexed: 11/20/2022] Open
Abstract
Progressive supranuclear palsy (PSP) and late-stage idiopathic Parkinson’s disease (IPD) are neurodegenerative movement disorders resulting in different postural instability and falling symptoms. IPD falls occur usually forward in late stage, whereas PSP falls happen in early stages, mostly backward, unprovoked, and with high morbidity. Self-triggered, weighted movements appear to provoke falls in IPD, but not in PSP. Repeated self-triggered lifting of a 0.5–1-kg weight (<2% of body weight) with the dominant hand was performed in 17 PSP, 15 IPD with falling history, and 16 controls on a posturography platform. PSP showed excessive force scaling of weight and body motion with high-frequency multiaxial body sway, whereas IPD presented a delayed-onset forward body displacement. Differences in center of mass displacement apparent at very small weights indicate that both syndromes decompensate postural control already within stability limits. PSP may be subject to specific postural system devolution. IPD are susceptible to delayed forward falling. Differential physiotherapy strategies are suggested.
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Affiliation(s)
- Stefan Kammermeier
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany
| | - Lucia Dietrich
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany.,Abteilung für Allgemeinchirurgie, Kliniken Ostallgäu-Kaufbeuren, Kaufbeuren, Germany
| | - Kathrin Maierbeck
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany.,Klinikum der Universität München, Klinik für Anästhesiologie, München, Germany
| | - Annika Plate
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany
| | - Stefan Lorenzl
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany.,Abteilung für Neurologie, Krankenhaus Agatharied, Hausham, Germany
| | - Arun Singh
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany.,Department of Neurology, University of Iowa, Iowa, IA, United States
| | - Ahmad Ahmadi
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany
| | - Kai Bötzel
- Ludwig-Maximilians-Universität München, Neurologische Klinik und Poliklinik, München, Germany
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Piscitelli D, Falaki A, Solnik S, Latash ML. Anticipatory postural adjustments and anticipatory synergy adjustments: preparing to a postural perturbation with predictable and unpredictable direction. Exp Brain Res 2017; 235:713-730. [PMID: 27866261 PMCID: PMC5316309 DOI: 10.1007/s00221-016-4835-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/10/2016] [Indexed: 11/28/2022]
Abstract
We explored two aspects of feed-forward postural control, anticipatory postural adjustments (APAs) and anticipatory synergy adjustments (ASAs) seen prior to self-triggered unloading with known and unknown direction of the perturbation. In particular, we tested two main hypotheses predicting contrasting changes in APAs and ASAs. The first hypothesis predicted no major changes in ASAs. The second hypothesis predicted delayed APAs with predominance of co-contraction patterns when perturbation direction was unknown. Healthy subjects stood on the force plate and held a bar with two loads acting in the forward and backward directions. They pressed a trigger that released one of the loads causing a postural perturbation. In different series, the direction of the perturbation was either known (the same load released in all trials) or unknown (the subjects did not know which of the two loads would be released). Surface electromyograms were recorded and used to quantify APAs, synergies stabilizing center of pressure coordinate (within the uncontrolled manifold hypothesis), and ASA. APAs and ASAs were seen in all conditions. APAs were delayed, and predominance of co-contraction patterns was seen under the conditions with unpredictable direction of perturbation. In contrast, no significant changes in synergies and ASAs were seen. Overall, these results show that feed-forward control of vertical posture has two distinct components, reflected in APAs and ASAs, which show qualitatively different adjustments with changes in predictability of the direction of perturbation. These results are interpreted within the recently proposed hierarchical scheme of the synergic control of motor tasks. The observations underscore the complexity of the feed-forward postural control, which involves separate changes in salient performance variables (such as coordinate of the center of pressure) and in their stability properties.
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Affiliation(s)
- Daniele Piscitelli
- School of Medicine and Surgery, PhD Program in Neuroscience, University of Milano-Bicocca, Milan, Italy
- Department of Kinesiology, Rec.Hall-268N, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Ali Falaki
- Department of Kinesiology, Rec.Hall-268N, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Stanislaw Solnik
- Department of Kinesiology, Rec.Hall-268N, The Pennsylvania State University, University Park, PA, 16802, USA
- Department of Physical Therapy, University of North Georgia, Dahlonega, GA, USA
- University School of Physical Education, Wroclaw, Poland
| | - Mark L Latash
- Department of Kinesiology, Rec.Hall-268N, The Pennsylvania State University, University Park, PA, 16802, USA.
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11
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Quantitative analysis of upright standing in adults with late-onset Pompe disease. Sci Rep 2016; 6:37040. [PMID: 27845393 PMCID: PMC5109234 DOI: 10.1038/srep37040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 10/24/2016] [Indexed: 11/08/2022] Open
Abstract
Pompe disease is a rare disorder producing muscle weakness and progressive impairments in performing daily motor activities, such as walking and standing. Most studies have focused on dysfunctions at cellular level, restricting the examination of gross motor functions to qualitative or subjective rating scales evaluations. With the aim of providing an instrumented quantification of upright standing in Pompe disease, we used a force platform to measure the center of pressure over three foot positions and with eyes open and closed. Amplitude and variability of body sway were measured to determine the level of postural stability, while power spectrum analysis and nonlinear computations were performed to explore the structure of the postural control. In comparison with healthy participants, patients with Pompe disease showed a reduced level of postural stability, but irrelevant variations in frequency content and spatio-temporal structure of the sway motion were detected. Changes in foot position did not increase the postural instability associated with Pompe disease, but prominent worsening occurred in the patients when they stand with eyes closed, particularly along the anterior-posterior direction. These results provide objective elements to monitor deficiencies of upright standing in Pompe disease, emphasizing the specific contributions of sway direction and sensory deficits.
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12
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Casabona A, Leonardi G, Aimola E, La Grua G, Polizzi CM, Cioni M, Valle MS. Specificity of foot configuration during bipedal stance in ballet dancers. Gait Posture 2016; 46:91-7. [PMID: 27131184 DOI: 10.1016/j.gaitpost.2016.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 02/10/2016] [Accepted: 02/26/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND AIM Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. METHODS Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. RESULTS Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. CONCLUSIONS We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
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Affiliation(s)
- Antonino Casabona
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy; Gait and Posture Analysis Laboratory, University of Catania, Catania, Italy; Physical Medicine and Rehabilitation Residency Program, University of Catania, Catania, Italy.
| | - Giuseppa Leonardi
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Ettore Aimola
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Giovanni La Grua
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Cristina Maria Polizzi
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Matteo Cioni
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy; Gait and Posture Analysis Laboratory, University of Catania, Catania, Italy; Physical Medicine and Rehabilitation Residency Program, University of Catania, Catania, Italy
| | - Maria Stella Valle
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy; Gait and Posture Analysis Laboratory, University of Catania, Catania, Italy
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Labanca L, Laudani L, Casabona A, Menotti F, Mariani PP, Macaluso A. Early compensatory and anticipatory postural adjustments following anterior cruciate ligament reconstruction. Eur J Appl Physiol 2015; 115:1441-51. [DOI: 10.1007/s00421-015-3126-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 02/04/2015] [Indexed: 01/09/2023]
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Effects of predictability of load magnitude on the response of the Flexor Digitorum Superficialis to a sudden fingers extension. PLoS One 2014; 9:e109067. [PMID: 25271638 PMCID: PMC4182945 DOI: 10.1371/journal.pone.0109067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 09/07/2014] [Indexed: 11/19/2022] Open
Abstract
Muscle reflexes, evoked by opposing a sudden joint displacement, may be modulated by several factors associated with the features of the mechanical perturbation. We investigated the variations of muscle reflex response in relation to the predictability of load magnitude during a reactive grasping task. Subjects were instructed to flex the fingers 2–5 very quickly after a stretching was exerted by a handle pulled by loads of 750 or 1250 g. Two blocks of trials, one for each load (predictable condition), and one block of trials with a randomized distribution of the loads (unpredictable condition) were performed. Kinematic data were collected by an electrogoniometer attached to the middle phalanx of the digit III while the electromyography of the Flexor Digitorum Superficialis muscle was recorded by surface electrodes. For each trial we measured the kinematics of the finger angular rotation, the latency of muscle response and the level of muscle activation recorded below 50 ms (short-latency reflex), between 50 and 100 ms (long-latency reflex) and between 100 and 140 ms (initial portion of voluntary response) from the movement onset. We found that the latency of the muscle response lengthened from predictable (35.5±1.3 ms for 750 g and 35.5±2.5 ms for 1250 g) to unpredictable condition (43.6±1.3 ms for 750 g and 40.9±2.1 ms for 1250 g) and the level of muscle activation increased with load magnitude. The parallel increasing of muscle activation and load magnitude occurred within the window of the long-latency reflex during the predictable condition, and later, at the earliest portion of the voluntary response, in the unpredictable condition. Therefore, these results indicate that when the amount of an upcoming perturbation is known in advance, the muscle response improves, shortening the latency and modulating the muscle activity in relation to the mechanical demand.
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Emergent perception–action couplings regulate postural adjustments during performance of externally-timed dynamic interceptive actions. PSYCHOLOGICAL RESEARCH 2014; 79:829-43. [DOI: 10.1007/s00426-014-0613-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 09/13/2014] [Indexed: 01/06/2023]
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Voudouris D, Radhakrishnan S, Hatzitaki V, Brenner E. Does postural stability affect grasping? Gait Posture 2013; 38:477-82. [PMID: 23403151 DOI: 10.1016/j.gaitpost.2013.01.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 01/14/2013] [Accepted: 01/19/2013] [Indexed: 02/02/2023]
Abstract
We examined whether challenging upright stance influences the execution of a grasping task. Participants reached to grasp a small sphere while standing either on a stable surface or on foam. Before reaching for the sphere, participants exhibited more body sway and greater fluctuations in the centre of pressure when standing on foam. While reaching for the sphere, the overall body posture changed less when standing on foam than when standing on the stable surface. The digits' and wrist's movements towards the sphere were no different when standing on foam than when standing on the stable surface. Presumably, the redundancy in the way movements can be performed is exploited to choose the most suitable changes in joint angles to achieve the desired movements of the digits under the prevailing conditions.
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Affiliation(s)
- Dimitris Voudouris
- Research Institute MOVE, Faculty of Human Movement Sciences, VU University, Amsterdam, The Netherlands.
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Eckerle JJ, Berg WP, Ward RM. The effect of load uncertainty on anticipatory muscle activity in catching. Exp Brain Res 2012; 220:311-8. [DOI: 10.1007/s00221-012-3139-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 05/29/2012] [Indexed: 01/02/2023]
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Tijtgat P, Vanrenterghem J, Bennett SJ, De Clercq D, Savelsbergh GJ, Lenoir M. Implicit advance knowledge effects on the interplay between arm movements and postural adjustments in catching. Neurosci Lett 2012; 518:117-21. [DOI: 10.1016/j.neulet.2012.04.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 04/24/2012] [Accepted: 04/26/2012] [Indexed: 11/26/2022]
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