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Armstrong DP, Fischer SL. Sensitivity of principal component analysis outcomes to data pre-processing conditions when quantifying trial-to-trial variability in whole-body kinematics. Comput Methods Biomech Biomed Engin 2024:1-13. [PMID: 38884341 DOI: 10.1080/10255842.2024.2367745] [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: 06/27/2023] [Accepted: 06/07/2024] [Indexed: 06/18/2024]
Abstract
This study investigated whether modes of variance in trial-to-trial whole-body kinematic variability identified by principal component analysis (PCA) were consistent across data pre-processing conditions generated from a common dataset. Comparisons made included 1) when trajectory data was expressed in a global vs. local reference frame; 2) when the number of landmarks used to represent whole-body motion differed, and; 3) whether input trajectory data were normalized to participant stature. Varying data pre-processing conditions prior to PCA does not bias the total variance identified. However, it can influence how modes of variance are dispersed across PCs, which in turn, can influence interpretation.
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Affiliation(s)
- Daniel P Armstrong
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, Canada
| | - Steven L Fischer
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, Canada
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Massó-Ortigosa N, Rey-Abella F, Gutiérrez-Vilahú L, Milà R, Guerra-Balic M, Oviedo GR. Analysis of the centre of pressure in bipedal stance among individuals with and without intellectual disabilities, individuals with Down syndrome and dancers with Down syndrome. JOURNAL OF INTELLECTUAL DISABILITY RESEARCH : JIDR 2024; 68:524-536. [PMID: 38350666 DOI: 10.1111/jir.13127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 10/25/2023] [Accepted: 01/25/2024] [Indexed: 02/15/2024]
Abstract
BACKGROUND Individuals with intellectual disabilities (IDs) often present deficiencies in motor, balance and postural control. On the other hand, the practice of physical activity and dance usually reduces these deficiencies. Therefore, in this study, we aimed to compare the control of the centre of pressure (COP) in people with Down syndrome (DS) or other causes of ID in relation to people without disabilities and to observe the influence of vision and the practice of dance. METHODS This cross-sectional study analyses the COP in a static standing position with open and closed eyes in four study groups. A total of 273 people were recruited (80 adults without ID, 46 adults with DS, 120 adults with other causes of ID and 27 dancers with DS). RESULTS A greater area of oscillation and path of the COP was observed in the participants with ID compared with the participants without ID, especially in the sway area of the COP. The oscillation speed of the COP was also higher. When analysing the displacement of the COP, anteroposterior and mediolateral components, there were also differences, except when comparing the group of dancers with DS with respect to the group without ID. The visual condition only influenced the group of participants without disabilities. CONCLUSIONS The results of our study show that there is a less efficient static postural control in people with ID, as greater displacements were observed in the COP of the participants with ID. The differences in some specific variables that analyse the displacement of the COP were smaller when comparing the group of dancers with DS and the individuals without ID.
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Affiliation(s)
- N Massó-Ortigosa
- Blanquerna School of Health Science, University Ramon Llull, Barcelona, Spain
| | - F Rey-Abella
- Blanquerna School of Health Science, University Ramon Llull, Barcelona, Spain
| | - L Gutiérrez-Vilahú
- Blanquerna School of Health Science, University Ramon Llull, Barcelona, Spain
| | - R Milà
- Blanquerna School of Health Science, University Ramon Llull, Barcelona, Spain
| | - M Guerra-Balic
- Blanquerna Faculty of Psychology, Education and Sports Sciences, University Ramon Llull, Barcelona, Spain
| | - G R Oviedo
- Blanquerna School of Health Science, University Ramon Llull, Barcelona, Spain
- Blanquerna Faculty of Psychology, Education and Sports Sciences, University Ramon Llull, Barcelona, Spain
- ACTIUM Functional Anatomy Group, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Barcelona, Spain
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Barsotti E, Goodman B, Samuelson R, Carvour ML. A Scoping Review of Wearable Technologies for Use in Individuals With Intellectual Disabilities and Diabetic Peripheral Neuropathy. J Diabetes Sci Technol 2024:19322968241231279. [PMID: 38439547 DOI: 10.1177/19322968241231279] [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] [Indexed: 03/06/2024]
Abstract
BACKGROUND Individuals with intellectual disabilities (IDs) are at risk of diabetes mellitus (DM) and diabetic peripheral neuropathy (DPN), which can lead to foot ulcers and lower-extremity amputations. However, cognitive differences and communication barriers may impede some methods for screening and prevention of DPN. Wearable and mobile technologies-such as smartphone apps and pressure-sensitive insoles-could help to offset these barriers, yet little is known about the effectiveness of these technologies among individuals with ID. METHODS We conducted a scoping review of the databases Embase, PubMed, and Web of Science using search terms for DM, DPN, ID, and technology to diagnose or monitor DPN. Finding a lack of research in this area, we broadened our search terms to include any literature on technology to diagnose or monitor DPN and then applied these findings within the context of ID. RESULTS We identified 88 articles; 43 of 88 (48.9%) articles were concerned with gait mechanics or foot pressures. No articles explicitly included individuals with ID as the target population, although three articles involved individuals with other cognitive impairments (two among patients with a history of stroke, one among patients with hemodialysis-related cognitive changes). CONCLUSIONS Individuals with ID are not represented in studies using technology to diagnose or monitor DPN. This is a concern given the risk of DM complications among patients with ID and the potential for added benefit of such technologies to reduce barriers to screening and prevention. More studies should investigate how wearable devices can be used among patients with ID.
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Affiliation(s)
- Ercole Barsotti
- College of Public Health, University of Iowa, Iowa City, IA, USA
- Department of Psychiatry, University of Iowa, Iowa City, IA, USA
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Bailey Goodman
- College of Public Health, University of Iowa, Iowa City, IA, USA
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Riley Samuelson
- Hardin Library for the Health Sciences, University of Iowa, Iowa City, IA, USA
| | - Martha L Carvour
- College of Public Health, University of Iowa, Iowa City, IA, USA
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
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Beerse M, Alam T, Wu J. Dynamic gait stability in children with and without Down syndrome during overground walking. Clin Biomech (Bristol, Avon) 2024; 111:106163. [PMID: 38154438 DOI: 10.1016/j.clinbiomech.2023.106163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 12/30/2023]
Abstract
BACKGROUND Challenging children with Down syndrome to walk fast and with external ankle load has demonstrated acute adjustments, such as increased step length and decreased step width, and improved joint stability. However, it is unknown to what extent these task constraints affect gait stability. Assessing dynamic gait stability through margin-of-stability not only quantifies adjustments related to balance control, but also informs safety considerations. METHODS Twenty-four children with and without Down syndrome participated in this study. Subjects walked overground at two speed conditions: self-selected (normal) and as fast as possible (fast); and two ankle load conditions: no load and ankle load of 2% body mass. We assessed margin-of-stability in the anteroposterior and mediolateral directions, separately, at three gait events of toe-off, mid-swing, and heel strike. FINDINGS Children with Down syndrome walked with greater mediolateral margin-of-stability than typically developing children. Children with Down syndrome demonstrated less anteroposterior margin-of-stability than typically developing children only before heel-strike at normal speed but increased anteroposterior margin-of-stability at fast speed. The ankle load increased the mediolateral margin-of-stability in both groups but did not impact the anteroposterior margin-of-stability. In addition, children with Down syndrome took shorter and wider steps for more lateral placement of mediolateral margin-of-stability. INTERPRETATION Children with Down syndrome were capable of adjusting their margin-of-stability for fast walking and ankle-load conditions. However, children with Down syndrome walked with less mediolateral stability and anteroposterior mobility than typically developing children. Children with Down syndrome overcompensate the mediolateral foot placement to recapture their margin-of-stability and maintain gait stability.
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Affiliation(s)
- Matthew Beerse
- Department of Health and Sport Science, University of Dayton, Dayton, OH, USA
| | - Tasnuva Alam
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA, USA; Center for Movement and Rehabilitation Research, Georgia State University, Atlanta, GA, USA
| | - Jianhua Wu
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA, USA; Center for Movement and Rehabilitation Research, Georgia State University, Atlanta, GA, USA.
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Cheng HYK, Shieh WY, Yu YC, Li PW, Ju YY. Video-Based Behaviorally Coded Movement Assessment for Adolescents with Intellectual Disabilities: Application in Leg Dribbling Performance. SENSORS (BASEL, SWITZERLAND) 2022; 23:179. [PMID: 36616777 PMCID: PMC9824743 DOI: 10.3390/s23010179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/21/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Measuring motor performance in individuals with intellectual disabilities (ID) is quite challenging. The objective of this study was to compare the motor performances of individuals with ID and those with typical development (TD) during soccer dribbling through video-based behavior-coded movement assessment along with a wearable sensor. A cross-sectional research design was adopted. Adolescents with TD (N = 25) and ID (N = 29) participated in the straight-line and zigzag soccer dribbling tests. The dribbling performance was videotaped, and the footage was then analyzed with customized behavior-coding software. The coded parameters were the time for movement completion, the number of kicks, blocks, steps, the number of times the ball went out of bounds, the number of missed cones, and the trunk tilt angle. Participants with ID exhibited significantly poorer performance and demonstrated greater variances in many time and frequency domain parameters. It also revealed that participants with ID kicked with both feet while dribbling, whereas those with TD mainly used the dominant foot. The present findings demonstrated how the ID population differed from their peers in lower-extremity strategic control. The customized video-based behavior-coded approach provides an efficient and effective way to gather behavioral data and calculate performance parameter statistics in populations with intellectual disabilities.
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Affiliation(s)
- Hsin-Yi Kathy Cheng
- Graduate Institute of Early Intervention, College of Medicine, Chang Gung University, No. 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 333, Taiwan
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, 5 Fu-Hsing Street, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Wann-Yun Shieh
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, 5 Fu-Hsing Street, Kwei-Shan, Tao-Yuan 333, Taiwan
- Department of Computer Science and Information Engineering, College of Engineering, Chang Gung University, No. 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Yu-Chun Yu
- Taoyuan Municipal Taoyuan Special School, No. 10, Deshou Street, Taoyuan District, Tao-Yuan 330, Taiwan
| | - Pao-Wen Li
- Graduate Institute of Early Intervention, College of Medicine, Chang Gung University, No. 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Yan-Ying Ju
- Department of Adapted Physical Education, National Taiwan Sport University, No. 250, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 333, Taiwan
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Energy analysis of gait in patients with down syndrome. Heliyon 2022; 8:e11702. [PMID: 36425421 PMCID: PMC9678721 DOI: 10.1016/j.heliyon.2022.e11702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/24/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022] Open
Abstract
Background the primary aim of this study is to analyse the energy parameters of patients with Down syndrome compared to a control group and secondly to verify whether the sport activity leads to differences in energy expenditure. Methods 3 groups of subjects were identified: 8 healthy subjects and 147 subjects with Down syndrome, of whom 14 played sports at least once a week. An energy index was calculated, given by the ratio between potential and kinetic energy. Next, kinetic ad potential energy parameters were extrapolated at 60% of the gait cycle (propulsion phase). Findings Down syndrome group was compared with the control group and emerged that the energy index was higher in the first one. No changes were found between Down syndrome and Down syndrome Sport groups. The analysis of the energy parameters showed that all parameters, except the medio-lateral kinetic energy, were higher in the control than in the Down syndrome groups. The potential energy, medio-lateral kinetic energy, and vertical were higher in the Down syndrome Sport group than in the Down syndrome group. The kinetic energy and the mean velocity were higher in the control group than in Down syndrome Sport group while the medio-lateral kinetic energy was lower. Interpretation sport modified the parameter of potential energy but not that of kinetic energy, which continued to be different compared to the healthy group and increased the oscillations in the medio-lateral plane, which were double compared to Down syndrome group. The increase in potential energy, found to be almost equal to that of control group, indicates an increase in vertical oscillations. This could be because subjects who practise sports have stronger muscles that allow a greater push-off ability, which therefore increases their potential energy.
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Malloggi C, Zago M, Galli M, Sforza C, Scarano S, Tesio L. Kinematic patterns during walking in children: Application of principal component analysis. Hum Mov Sci 2021; 80:102892. [PMID: 34749196 DOI: 10.1016/j.humov.2021.102892] [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: 02/16/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 10/19/2022]
Abstract
The relative displacements of body segments during walking can be reduced to a small number of multi-joint kinematic patterns, pmk, through Principal Component Analysis (PCA). These patterns were extracted from two groups of children (n = 8, aged 6-9 years, 4 males, and n = 8, aged 10-13 years, 4 males) and 7 adults (21-29 years, 1 male), walking on a treadmill at various velocities, normalized to body stature (adimensional Froude number, Fr). The three-dimensional coordinates of body markers were captured by an optoelectronic system. Five components (pm1 to pm5) explained 99.1% of the original dataset variance. The relationship between the variance explained ("size") of each pmk and the Fr velocity varied across movement components and age groups. Only pm1 and pm2, which described kinematic patterns in the sagittal plane, showed significant differences (at p < 0.05) across pairs of age groups. The time course of the size of all the five components matched various mechanical events of the step cycle at the level of both body system and lower limb joints. Such movement components appeared clinically interpretable and lend themselves as potential markers of neural development of walking.
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Affiliation(s)
- Chiara Malloggi
- Istituto Auxologico Italiano, IRCCS, Department of Neurorehabilitation Sciences, Ospedale San Luca, Milan, Italy
| | - Matteo Zago
- Dipartimento di Meccanica, Politecnico di Milano, Italy
| | - Manuela Galli
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Italy
| | - Chiarella Sforza
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | - Stefano Scarano
- Istituto Auxologico Italiano, IRCCS, Department of Neurorehabilitation Sciences, Ospedale San Luca, Milan, Italy; Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | - Luigi Tesio
- Istituto Auxologico Italiano, IRCCS, Department of Neurorehabilitation Sciences, Ospedale San Luca, Milan, Italy; Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
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Federolf P, Angulo-Barroso RM, Busquets A, Ferrer-Uris B, Gløersen Ø, Mohr M, Ó' Reilly D, Promsri A, van Andel S, Wachholz F, Werner I, Zago M. Letter to the editor regarding "The assessment of center of mass and center of pressure during quiet stance: Current applications and future directions". J Biomech 2021; 128:110729. [PMID: 34536902 DOI: 10.1016/j.jbiomech.2021.110729] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Peter Federolf
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Rosa M 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
| | - 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
| | - Øyvind Gløersen
- Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
| | - Maurice Mohr
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - David Ó' Reilly
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
| | - Arunee Promsri
- Department of Physical Therapy, School of Allied Health Sciences, University of Phayao, Muang, Phayao, Thailand; Unit of Excellence in Well-Being and Health Innovation, School of Allied Health Sciences, University of Phayao, Muang, Phayao, Thailand
| | - Steven van Andel
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Felix Wachholz
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Inge Werner
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Matteo Zago
- Dipartimento di Meccanica, Politecnico di Milano, Milan, Italy; E4Sport Laboratory, Politecnico di Milano, Lecco, Italy
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Marano M, Pompucci A, Motolese F, Rossi M, Coletta E, Di Lazzaro V, Fasano A, Petrella G. Normal Pressure Hydrocephalus in Down Syndrome: The Report of Two Cases. J Alzheimers Dis 2021; 77:979-984. [PMID: 32804139 DOI: 10.3233/jad-200409] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Down syndrome (DS) is the most common cause of intellectual disability in infants and has a well-known relationship with the Alzheimer's disease. The association between DS and the other pathologies of senescence, such as normal pressure hydrocephalus (NPH), has been poorly investigated. This series included two DS patients with NPH. In both cases, NPH symptoms were initially misdiagnosed as DS associated senescence. Patients were treated with ventricular-peritoneal shunt, showing a sustained improvement (1 and 4 years of follow-up). To our knowledge, this is the first description of the occurrence of NPH in adult patients with DS and surgical outcomes.
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Affiliation(s)
- Massimo Marano
- Neurology, Neurophysiology and Neurobiology unit, Department of Medicine, University Campus Bio-Medico of Rome, Italy
| | - Angelo Pompucci
- Department of Neurosurgery, S. Maria Goretti Hospital, Latina, Italy
| | - Francesco Motolese
- Neurology, Neurophysiology and Neurobiology unit, Department of Medicine, University Campus Bio-Medico of Rome, Italy
| | - Mariagrazia Rossi
- Neurology, Neurophysiology and Neurobiology unit, Department of Medicine, University Campus Bio-Medico of Rome, Italy
| | | | - Vincenzo Di Lazzaro
- Neurology, Neurophysiology and Neurobiology unit, Department of Medicine, University Campus Bio-Medico of Rome, Italy
| | - Alfonso Fasano
- Edmond J. Safra Program in Parkinson's Disease and the Morton and Gloria Shulman Movement Disorders Centre and the, Toronto Western Hospital, UHN, Toronto, Ontario, Canada.,Division of Neurology, Department of Medicine, University of Toronto, Toronto, Canada.,Krembil Brain Institute, Toronto, Ontario, Canada.,CenteR for Advancing Neurotechnological Innovation to Application (CRANIA), Toronto, ON, Canada
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Ó' Reilly D. Slow walking synergies reveal a functional role for arm swing asymmetry in healthy adults: A principal component analysis with relation to mechanical work. Gait Posture 2021; 85:126-130. [PMID: 33549966 DOI: 10.1016/j.gaitpost.2021.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The purpose of this study was to reveal a functional role for arm-swing asymmetry during gait in healthy adults. To this end, the primary aim was to investigate the role of neuromuscular control on the asymmetry of propulsive and collision joint work at either end of the double-support phase (WDS) in the context of sidedness. The secondary aim was to investigate the effect of neuromuscular control on propulsive and collision joint work at either end of the single-support phase (WSS) in the context of arm-swing asymmetry. METHODS Slow -walking trials of 25 participants were analysed using principal component analysis to generate movement synergies (PMk). Independent variables included the tightness of neuromuscular control (N1) formulated from the first PMk and the directional Arm-swing asymmetry index (dASI). Dependent variables included the difference between double-support collision and propulsive joint work (WDS) and a ratio consisting of the difference between single-support collision and propulsive work of both sides (WSS). A linear mixed-effects model was utilized for aim 1 while a multiple linear regression analysis was undertaken for aim 2. RESULTS Healthy adult gait was accompanied by a left-side dominant arm-swing on average. For aim 1, N1 demonstrated a significant negative effect on WDS while sidedness had a negative direct effect and positive indirect effect through N1 on WDS. The most notable finding was the interaction between dASI and N1 which demonstrated a highly significant positive effect on WSS. INTERPRETATION Evidence was put forward that arm-swing asymmetry during gait is related to footedness among healthy adults. Future studies should look to formally confirm this finding.
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Affiliation(s)
- David Ó' Reilly
- Catherine McAuley School of Nursing and Midwifery, University College Cork, Co. Cork, Ireland; Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom.
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11
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Zago M, Condoluci C, Manzia CM, Pili M, Manunza ME, Galli M. Multi-segmental postural control patterns in down syndrome. Clin Biomech (Bristol, Avon) 2021; 82:105271. [PMID: 33477082 DOI: 10.1016/j.clinbiomech.2021.105271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 11/18/2020] [Accepted: 12/31/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Patients with Down Syndrome (DS) exhibit less efficient and unstable standing postural control. The specificities of somatosensorial deficits might result in a different utilization of resources and in distinct whole-body kinematic patterns, to date still unexplored. In this paper we aim at addressing multi-segmental coordination patterns in people with DS while maintaining standing balance under different visual conditions (open and closed eyes). METHODS This cross-sectional observational cohort study involved two groups of 23 patients with DS and 12 healthy controls. A 30-s standing balance test allowed to extract (i) the length of the trajectory of the center-of-pressure sway and 95% confidence ellipse area from Ground Reaction forces, and (ii) Principal Movement (PM) components from full-body motion kinematics; the latter were obtained exploiting a Principal Component Analysis-based approach, also embracing a motor-control perspective through the evaluation of the number of modifications applied by the neuromuscular controller on segments' acceleration. FINDINGS Trajectory length was significantly higher in patients; 95% ellipse confidence area did not differ between groups/condition. Postural movement components differed in people with DS from healthy controls not only in the "observable", behavioural phenotype (PM3 and PM8), but also in the amount of activation of the associated control (PM1 to PM8, over-activated in DS) in all spatial directions. INTERPRETATION Results reinforced the prevalence of a medio-lateral hip strategy (instead of an ankle strategy) in maintaining postural stability. Most important, they revealed a less frequent activation of postural patterns in all spatial directions.
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Affiliation(s)
- Matteo Zago
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Italy.
| | | | | | - Marta Pili
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Italy
| | - Marta Elisa Manunza
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Italy
| | - Manuela Galli
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Italy
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12
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Werner I, Szelenczy N, Wachholz F, Federolf P. How Do Movement Patterns in Weightlifting (Clean) Change When Using Lighter or Heavier Barbell Loads?-A Comparison of Two Principal Component Analysis-Based Approaches to Studying Technique. Front Psychol 2021; 11:606070. [PMID: 33569024 PMCID: PMC7868553 DOI: 10.3389/fpsyg.2020.606070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 12/08/2020] [Indexed: 01/15/2023] Open
Abstract
This study compared whole body kinematics of the clean movement when lifting three different loads, implementing two data analysis approaches based on principal component analysis (PCA). Nine weightlifters were equipped with 39 markers and their motion captured with 8 Vicon cameras at 100 Hz. Lifts of 60, 85, and 95% of the one repetition maximum were analyzed. The first PCA (PCAtrial) analyzed variance among time-normed waveforms compiled from subjects and trials; the second PCA (PCAposture) analyzed postural positions compiled over time, subjects and trials. Load effects were identified through repeated measures ANOVAs with Bonferroni-corrected post-hocs and through Cousineau-Morey confidence intervals. PCAtrial scores differed in the first (p < 0.016, ηp2 = 0.694) and fifth (p < 0.006, ηp2 = 0.768) principal component, suggesting that increased barbell load produced higher initial elevation, lower squat position, wider feet position after squatting, and less inclined arms. PCAposture revealed significant timing differences in all components. We conclude, first, barbell load affects specific aspects of the movement pattern of the clean; second, the PCAtrial approach is better suited for detecting deviations from a mean motion trajectory and its results are easier to interpret; the PCAposture approach reveals coordination patterns and facilitates comparisons of postural speeds and accelerations.
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Affiliation(s)
- Inge Werner
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Nicolai Szelenczy
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria.,BFF Training Ulm, Ulm, Germany
| | - Felix Wachholz
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Peter Federolf
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
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13
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Ó’Reilly D, Federolf P. Identifying differences in gait adaptability across various speeds using movement synergy analysis. PLoS One 2021; 16:e0244582. [PMID: 33411749 PMCID: PMC7790368 DOI: 10.1371/journal.pone.0244582] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 12/11/2020] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION The aim of this study was to identify movement synergies during normal-walking that can differentiate healthy adults in terms of gait adaptability at various speeds. To this end, the association between movement synergies and lower-limb coordination variability or Deviation Phase (DP) was investigated. This study also investigated the moderating effect of movement synergies on the relationship between DP and the smoothness of arm-swing motion (NJI). METHOD A principal component analysis of whole-body marker trajectories from normal-walking treadmill trials at 0.8m/s, 1.2m/s and 1.6m/s was undertaken. Both DP and NJI were derived from approx. 8 minutes of perturbed-walking treadmill trials. Principal movement components, PMk, were derived and the RMS of the 2nd-order differentiation of these PMk (PAkRMS) were included as independent variables representing the magnitude of neuromuscular control in each PMk. Each PAkRMS were input into maximal linear mixed-effects models against DP and (DP x NJI) respectively. A stepwise elimination of terms and comparison of models using Anova identified optimal models for both aims. RESULTS The principal movement related to the push-off mechanism of gait (PA4RMS) was identified as an optimal model and demonstrated a significant negative effect on DP however this effect may differ considerably across walking-speeds. An optimal model for describing the variance in (DP x NJI) included a fixed-effect of PA6RMS representing Right-Left side weight transfer was identified. INTERPRETATION The hypotheses that individuals who exhibited greater control on specific kinematic synergies would exhibit variations during perturbed walking was substantiated. Supporting evidence for the role of movement synergies during the double-support phase of gait in proactively correcting balance was presented as well as the potential for this approach in targeted rehabilitation. The potential influence of leg dominance on gait adaptability was also discussed. Future studies should investigate further the role of walking-speed and leg dominance on movement synergies and look to generalize these findings to patient populations.
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Affiliation(s)
- David Ó’Reilly
- Catherine McAuley School of Nursing & Midwifery, Brookfield Campus, University College Cork, Co. Cork, Ireland
- Faculty of Biological sciences, School of Biomedical sciences, University of Leeds, Leeds, United Kingdom
| | - Peter Federolf
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
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Zago M, Duarte NAC, Grecco LAC, Condoluci C, Oliveira CS, Galli M. Gait and postural control patterns and rehabilitation in Down syndrome: a systematic review. J Phys Ther Sci 2020; 32:303-314. [PMID: 32273655 PMCID: PMC7113426 DOI: 10.1589/jpts.32.303] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/21/2020] [Indexed: 12/26/2022] Open
Abstract
[Purpose] To describe (1) the current knowledge on gait and postural control in
individuals with Down syndrome in terms of spatiotemporal, kinematics and kinetics, and
(2) relevant rehabilitation strategies. [Methods] Randomized and non-randomized clinical
trials published between January 1997 and October 2019 were selected by searching four
scientific databases. We included studies on patients with Down syndrome involving gait
analysis or postural control. A custom data-extraction and appraisal form was developed to
collect the key features of each article. The PEDro Scale was used to evaluate the
methodological quality of the studies. [Results] A total of 37 out of 146 cross-sectional
and longitudinal studies were included in the review. The main abnormalities included:
reduction of gait velocity and step length, poor static balance with increased
anteroposterior and mediolateral oscillations and a larger step width. [Conclusion] A
number of compensatory patterns during movement was observed, with a direct influence on
improvements in stability and postural control throughout daily life. Intensive gait
training at an early age appears to produce long-term improvements in this population.
Future research should focus on the interaction between the motor and cognitive function,
and on the functional effects due to the exposure to an enriched environment.
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Affiliation(s)
- Matteo Zago
- Department of Electronics, Information and Bioengineering, Politecnico di Milano: Via Golgi 39, 20133, Milano, Italy
| | - Natalia Almeida Carvalho Duarte
- Department of Electronics, Information and Bioengineering, Politecnico di Milano: Via Golgi 39, 20133, Milano, Italy.,Santa Casa de Misericordia de Presidente Prudente, Brazil
| | | | | | | | - Manuela Galli
- Department of Electronics, Information and Bioengineering, Politecnico di Milano: Via Golgi 39, 20133, Milano, Italy
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