Muscle Synergy Analysis of Human Standing-Up Motion with Different Chair Heights and Different Motion Speeds

An, Qi; Ishikawa, Yuki; Nakagawa, Junki; Oka, Hiroyuki; Yamakawa, Hiroshi; Yamashita, Atsushi; Asama, Hajime

doi:10.1109/smc.2013.610

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…Therefore, the characteristics of the seat, which are a key factor in seated posture ergonomics, might induce APAs adaptations when performing the STS task. Several studies explored those determinants biomechanically, mainly seat height ( Rodosky et al, 1989 ; Schenkman et al, 1996 ; Gillette and Stevermer, 2012 ; An et al, 2013 ; Yoshioka et al, 2014 ) and feet position ( Shepherd and Koh, 1996 ; Khemlani et al, 1999 ; Kawagoe et al, 2000 ; Gillette and Stevermer, 2012 ; Ng et al, 2015 ). It was shown that lowering seat height and putting the feet forward resulted in greater joint constraints ( Burdett et al, 1985 ; Rodosky et al, 1989 ; Arborelius et al, 1992 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of Seat Backrest Inclination on the Muscular Pattern and Biomechanical Parameters of the Sit-to-Stand

Tebbache

Hamaoui

2021

Front. Hum. Neurosci.

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Objectives: The sit-to-stand (STS) transfer mobilizes an extended part of the kinematic chain throughout a postural phase characterized by a flexion of the trunk and a focal phase consisting of a whole-body extension. The aim of this study was to analyze the variations of the global muscular pattern and the biomechanical parameters in both phases, in relation with seat backrest inclination.Methods: Fifteen participants were asked to stand up from a seat with 5 backrest inclination settings and at 2 execution speeds. The ground reaction forces and the activity levels of fifteen muscles of the trunk and lower limbs were investigated.Results: Backrest-induced modifications were mainly observed in the postural phase: inclining the backrest backward increased the phase duration and the activity level of the sternocleidomastoideus and the rectus abdominis, while it reduced the activity of the tibialis anterior. It also allowed for an increased maximal anteroposterior velocity of the body center of mass. Higher execution speed led to increased and earlier muscular activities of many trunk and lower limbs muscles, predominantly in the postural phase.Discussion: Taken together, these results suggest that a greater backrest inclination increases the demand in the postural phase due to the increase of the upper body gravity torque about the ischial tuberosities, and requires an adaptation of muscular activity levels and timing, but with the same overall pattern. The kinetic energy gained during the longer excursion of the trunk may also require less activation of the lower limbs muscles involved in the generation of propulsive forces of the body.

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Section: Introductionmentioning

confidence: 99%

Effect of Seat Backrest Inclination on the Muscular Pattern and Biomechanical Parameters of the Sit-to-Stand

Tebbache

Hamaoui

2021

Front. Hum. Neurosci.

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“…Therefore, instead of individually controlling each muscle fiber, the human brain recruits weighted synergies to simplify a task involving multiple muscles or limbs. Currently, synergies are being used for a wide variety of applications, such as musculoskeletal movement analyses or gait therapy (Vinjamuri, 2008 ; Berniker et al, 2009 ; Vinjamuri et al, 2010 ; An et al, 2013 ; Routson et al, 2013 ; Steele et al, 2013 ; Simkins et al, 2014 ), robot design (Catalano et al, 2012 ; Wu and Asada, 2014 ), and control engineering systems (Popovic and Popovic, 2001 ; Wimbock et al, 2011 ; Kuppuswamy et al, 2012 ; Kuppuswamy and Harris, 2014 ; Wu and Asada, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

“…Typically, synergy analyses of human motion studies use NNMF. For example, An et al ( 2013 ) used NNMF to analyze muscle synergies of standing up motions with varying seat heights and standing speeds. Steele et al ( 2013 ) studied the impact the number and choice of muscles have on synergy analyses in a musculoskeletal model for an upper extremity task.…”

Section: Introductionmentioning

confidence: 99%

A Muscle Synergy-Inspired Adaptive Control Scheme for a Hybrid Walking Neuroprosthesis

Alibeji

Kirsch

Sharma

2015

Front. Bioeng. Biotechnol.

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A hybrid neuroprosthesis that uses an electric motor-based wearable exoskeleton and functional electrical stimulation (FES) has a promising potential to restore walking in persons with paraplegia. A hybrid actuation structure introduces effector redundancy, making its automatic control a challenging task because multiple muscles and additional electric motor need to be coordinated. Inspired by the muscle synergy principle, we designed a low dimensional controller to control multiple effectors: FES of multiple muscles and electric motors. The resulting control system may be less complex and easier to control. To obtain the muscle synergy-inspired low dimensional control, a subject-specific gait model was optimized to compute optimal control signals for the multiple effectors. The optimal control signals were then dimensionally reduced by using principal component analysis to extract synergies. Then, an adaptive feedforward controller with an update law for the synergy activation was designed. In addition, feedback control was used to provide stability and robustness to the control design. The adaptive-feedforward and feedback control structure makes the low dimensional controller more robust to disturbances and variations in the model parameters and may help to compensate for other time-varying phenomena (e.g., muscle fatigue). This is proven by using a Lyapunov stability analysis, which yielded semi-global uniformly ultimately bounded tracking. Computer simulations were performed to test the new controller on a 4-degree of freedom gait model.

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“…NMF was used by (AN et al, 2013) to analyze the muscle primitives of seats with different heights, and (STEELE; TRESCH; PERREAULT, 2013) analyzed the impact that the number and choice of muscles have on primitive analyzes in a musculoskeletal model. This restriction is essential because muscle activations processed from EMG data always have positive values.…”

Section: Nmf -Non-negative Matrix Factorizationmentioning

confidence: 99%

Evaluation of motor primitive-based adaptive control algorithms for lower limb exoskeletons

Nunes¹

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Primeiramente a DEUS, que com sua infinita misericórdia meu ajudou a chegar até aqui, sempre me dando forças e colocando pessoas no meu caminho que foram verdadeiros anjos.Ao meu esposo Marco Aurélio pelo amor, companheirismo, paciência, incentivo e ajuda incondicional durante todos esses anos de doutorado.À minha família, que é a base da minha vida, sinônimo de amor, compreensão e fé. À minha mãe, por seu amor imensurável, por ter orado tanto por mim e por sempre estar presente. Ao meu pai, por ter me apoiado e por ter confiado em mim quando eu quis sair de casa pra estudar. Aos meus sobrinhos, amores da minha vida, que me proporcionam tanto carinho e amor.Ao meu orientador, Adriano Siqueira, pela confiança e orientação. Pelas horas de reuniões tão engrandecedoras, pela compreensão nas horas difíceis e, principalmente, por não ter medido esforços para que eu chegasse até aqui. À minha querida Flaviane, que me aproximou ainda mais de Deus. Mulher de fé, me acolheu como uma irmã. Tem uma família que é exemplo de amor pra mim. Aos meus avós, José e Terezinha, pelo carinho e compreensão por eu ter ficado tanto tempo longe. Aos meus avós, José do Carmo (in memorian), e Lélia (in memorian), eram tão entusiasmados em me ver estudar, e sempre perguntavam quando eu terminaria. Não foi da vontade de Deus que eles estivessem aqui hoje pra eu poder respondê-los: terminei. Aos professores do Departamento de Engenharia Mecânica da EESC/USP. Aos professores, Samuel Nogueira e Glauco A. de Paula Caurin pelas contribuições ao trabalho dadas no exame de qualificação. À professora Zilda, que sempre me tratou com muito carinho.Aos funcionários do Laboratório de Mecatrônica e da Secretaria de Pós-Graduação do departamento de Engenharia Mecânica (em especial a Iara) que de alguma forma contribuíram para a realização deste trabalho.Aos colegas do Laboratório de Mecatrônica pelo ótimo ambiente de trabalho e companheirismo. Meninos brilhantes: fui muito privilegiada em estar junto a eles durante esses anos.Ao Ícaro, por todos os minutos que passamos juntos no laboratório. Entre um cafezinho e outro, estávamos lá trabalhando e dando boas gargalhadas. Como eu aprendi com esse menino! Além de ser uma pessoa generosa, é um aluno de excelência e terá um futuro brilhante.E por fim, e não menos importante, a todos os amigos que de uma forma ou outra, também fizeram parte. Ao Wilian Leão, que foi quem me incentivou a fazer mestrado e doutorado na USP e que hoje, apesar da distância, é meu amigo irmão. À Patrícia, minha eterna melhor amiga de infância. À Helena, que, de repente, estava na minha casa tomando café comigo e abrançando minhas gatas como se fossem dela, assim nasceu uma amizade. À Mariana, inspiração de coragem, que além de amiga será minha colega de profissão.

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Muscle Synergy Analysis of Human Standing-Up Motion with Different Chair Heights and Different Motion Speeds

Cited by 7 publications

References 11 publications

Effect of Seat Backrest Inclination on the Muscular Pattern and Biomechanical Parameters of the Sit-to-Stand

Effect of Seat Backrest Inclination on the Muscular Pattern and Biomechanical Parameters of the Sit-to-Stand

A Muscle Synergy-Inspired Adaptive Control Scheme for a Hybrid Walking Neuroprosthesis

Evaluation of motor primitive-based adaptive control algorithms for lower limb exoskeletons

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