keyword
MENU ▼
Read by QxMD icon Read
search

Muscle synergies

keyword
https://www.readbyqxmd.com/read/28324949/muscle-synergy-analysis-in-transtibial-amputee-during-ramp-ascending-activity
#1
P Mehryar, M S Shourijeh, H F Maqbool, M Torabi, A A Dehghani-Sanij
In developed countries, the highest number of amputees are elderly with transtibial amputation. Walking on inclined surfaces is difficult for amputees due to loss of muscle volume and strength thereby transtibial amputees (TA) rely on the intact limb to maintain stability. The aim of this study was to use the concatenated non-negative matrix factorization (CNMF) technique to calculate muscle synergy components and compare the difference in muscle synergies and their associated activation profiles in the healthy and amputee groups during ramp ascending (RA) activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268984/exploring-neuro-muscular-synergies-of-reaching-movements-with-unified-independent-component-analysis
#2
Fiorenzo Artoni, Elvira Pirondini, Alessandro Panarese, Silvestre Micera
The coordinated recruitment of group of muscles through muscles synergies is known to simplify the control of movements. However, how and to what extent such control scheme is encoded at a cortical level is poorly understood. So far, electroencephalography (EEG) and electromyography (EMG) have been used, separately, to investigate the cortical regions of the human brain which may be involved in activating muscle synergies. Here we aim at extending these results by looking for a hierarchical relationship between cortical and muscular sources of activity (neuro-muscular synergies) with a unified analysis of independent components (IC) simultaneously extracted from both EEG and EMG signals...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268653/analysis-of-muscle-synergy-for-evaluation-of-task-specific-performance-in-stroke-patients
#3
Si Li, Cheng Zhuang, Xiao Zhang, Chuanxin M Niu, Qing Xie, Ning Lan
Muscle synergy represents a central neural module that organizes and activates a group of muscles when performing a certain task. However, whether muscle synergy is a good physiological indicator of motor ability in task performance for patients suffering stroke is not clear. The purpose of this study is to understand how information of task-specific muscle synergy in healthy subjects and patients post stroke can be used to evaluate their motor ability, and further to assist motor rehabilitation for stroke patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268467/characterizing-muscular-activities-using-non-negative-matrix-factorization-from-emg-channels-for-driver-swings-in-golf
#4
Yasunori Ozaki, Ryosuke Aoki, Toshitaka Kimura, Youichi Takashima, Tomohiro Yamada
The goal of this study is to propose a data driven approach method to characterize muscular activities of complex actions in sports such as golf from a lot of EMG channels. Two problems occur in a many channel measurement. The first problem is that it takes a lot of time to check the many channel data because of combinatorial explosion. The second problem is that it is difficult to understand muscle activities related with complex actions. To solve these problems, we propose an analysis method of multi EMG channels using Non-negative Matrix Factorization and adopt the method to driver swings in golf...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227194/exploring-neuro-muscular-synergies-of-reaching-movements-with-unified-independent-component-analysis
#5
Fiorenzo Artoni, Elvira Pirondini, Alessandro Panarese, Silvestre Micera, Fiorenzo Artoni, Elvira Pirondini, Alessandro Panarese, Silvestre Micera, Elvira Pirondini, Alessandro Panarese, Fiorenzo Artoni, Silvestro Micera
The coordinated recruitment of group of muscles through muscles synergies is known to simplify the control of movements. However, how and to what extent such control scheme is encoded at a cortical level is poorly understood. So far, electroencephalography (EEG) and electromyography (EMG) have been used, separately, to investigate the cortical regions of the human brain which may be involved in activating muscle synergies. Here we aim at extending these results by looking for a hierarchical relationship between cortical and muscular sources of activity (neuro-muscular synergies) with a unified analysis of independent components (IC) simultaneously extracted from both EEG and EMG signals...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226835/analysis-of-muscle-synergy-for-evaluation-of-task-specific-performance-in-stroke-patients
#6
Si Li, Cheng Zhuang, Xiao Zhang, Chuanxin M Niu, Qing Xie, Ning Lan, Si Li, Cheng Zhuang, Xiao Zhang, Chuanxin M Niu, Qing Xie, Ning Lan, Chuanxin M Niu, Xiao Zhang, Cheng Zhuang, Si Li, Ning Lan, Qing Xie
Muscle synergy represents a central neural module that organizes and activates a group of muscles when performing a certain task. However, whether muscle synergy is a good physiological indicator of motor ability in task performance for patients suffering stroke is not clear. The purpose of this study is to understand how information of task-specific muscle synergy in healthy subjects and patients post stroke can be used to evaluate their motor ability, and further to assist motor rehabilitation for stroke patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226831/muscle-synergy-analysis-in-transtibial-amputee-during-ramp-ascending-activity
#7
P Mehryar, M S Shourijeh, H F Maqbool, M Torabi, A A Dehghani-Sanij, P Mehryar, M S Shourijeh, H F Maqbool, M Torabi, A A Dehghani-Sanij, A A Dehghani-Sanij, M S Shourijeh, P Mehryar, M Torabi, H F Maqbool
In developed countries, the highest number of amputees are elderly with transtibial amputation. Walking on inclined surfaces is difficult for amputees due to loss of muscle volume and strength thereby transtibial amputees (TA) rely on the intact limb to maintain stability. The aim of this study was to use the concatenated non-negative matrix factorization (CNMF) technique to calculate muscle synergy components and compare the difference in muscle synergies and their associated activation profiles in the healthy and amputee groups during ramp ascending (RA) activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226640/characterizing-muscular-activities-using-non-negative-matrix-factorization-from-emg-channels-for-driver-swings-in-golf
#8
Yasunori Ozaki, Ryosuke Aoki, Toshitaka Kimura, Youichi Takashima, Tomohiro Yamada, Yasunori Ozaki, Ryosuke Aoki, Toshitaka Kimura, Youichi Takashima, Tomohiro Yamada, Yasunori Ozaki, Youichi Takashima, Tomohiro Yamada, Toshitaka Kimura, Ryosuke Aoki
The goal of this study is to propose a data driven approach method to characterize muscular activities of complex actions in sports such as golf from a lot of EMG channels. Two problems occur in a many channel measurement. The first problem is that it takes a lot of time to check the many channel data because of combinatorial explosion. The second problem is that it is difficult to understand muscle activities related with complex actions. To solve these problems, we propose an analysis method of multi EMG channels using Non-negative Matrix Factorization and adopt the method to driver swings in golf...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28220067/shared-and-task-specific-muscle-synergies-during-normal-walking-and-slipping
#9
Mohammad Moein Nazifi, Han Ul Yoon, Kurt Beschorner, Pilwon Hur
Falling accidents are costly due to their prevalence in the workplace. Slipping has been known to be the main cause of falling. Understanding the motor response used to regain balance after slipping is crucial to developing intervention strategies for effective recovery. Interestingly, studies on spinalized animals and studies on animals subjected to electrical microstimulation have provided major evidence that the Central Nervous System (CNS) uses motor primitives, such as muscle synergies, to control motor tasks...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28158258/comparison-of-muscle-synergies-for-running-between-different-foot-strike-patterns
#10
Koji Nishida, Shota Hagio, Benio Kibushi, Toshio Moritani, Motoki Kouzaki
It is well known that humans run with a fore-foot strike (FFS), a mid-foot strike (MFS) or a rear-foot strike (RFS). A modular neural control mechanism of human walking and running has been discussed in terms of muscle synergies. However, the neural control mechanisms for different foot strike patterns during running have been overlooked even though kinetic and kinematic differences between different foot strike patterns have been reported. Thus, we examined the differences in the neural control mechanisms of human running between FFS and RFS by comparing the muscle synergies extracted from each foot strike pattern during running...
2017: PloS One
https://www.readbyqxmd.com/read/28144794/tuning-of-muscle-synergies-during-walking-along-rectilinear-and-curvilinear-trajectories-in-humans
#11
Noelia Chia Bejarano, Alessandra Pedrocchi, Antonio Nardone, Marco Schieppati, Walter Baccinelli, Marco Monticone, Giancarlo Ferrigno, Simona Ferrante
The aim of this study was to develop a methodology based on muscle synergies to investigate whether rectilinear and curvilinear walking shared the same neuro-motor organization, and how this organization was fine-tuned by the walking condition. Thirteen healthy subjects walked on rectilinear and curvilinear paths. Electromyographic data from thirteen back and lower-limb muscles were acquired, together with kinematic data using inertial sensors. Four macroscopically invariant muscle synergies, extracted through non-negative matrix factorization, proved a shared modular organization across conditions...
January 31, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28126336/modular-neuromuscular-control-of-human-locomotion-by-central-pattern-generator
#12
Seyyed Arash Haghpanah, Farzam Farahmand, Hassan Zohoor
The central pattern generators (CPG) in the spinal cord are thought to be responsible for producing the rhythmic motor patterns during rhythmic activities. For locomotor tasks, this involves much complexity, due to a redundant system of muscle actuators with a large number of highly nonlinear muscles. This study proposes a reduced neural control strategy for the CPG, based on modular organization of the co-active muscles, i.e., muscle synergies. Four synergies were extracted from the EMG data of the major leg muscles of two subjects, during two gait trials each, using non-negative matrix factorization algorithm...
February 28, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28114024/biofeedback-signals-for-robotic-rehabilitation-assessment-of-wrist-muscle-activation-patterns-in-healthy-humans
#13
Marianna Semprini, Anna Vera Cuppone, Ioannis Delis, Velentina Squeri, Stefano Panzeri, Juergen Konczak
Electrophysiological recordings from human muscles can serve as control signals for robotic rehabilitation devices. Given that many diseases affecting the human sensorimotor system are associated with abnormal patterns of muscle activation, such biofeedback can optimize human-robot interaction and ultimately enhance motor recovery. To understand how mechanical constraints and forces imposed by a robot affect muscle synergies, we mapped the muscle activity of 7 major arm muscles in healthy individuals performing goal-directed discrete wrist movements constrained by a wrist robot...
December 6, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28110044/dopaminergic-modulation-of-multi-muscle-synergies-in-postural-tasks-performed-by-patients-with-parkinson-s-disease
#14
Ali Falaki, Xuemei Huang, Mechelle M Lewis, Mark L Latash
BACKGROUND: Postural instability is one of most disabling motor symptoms in Parkinson's disease. Indices of multi-muscle synergies are new measurements of postural stability. OBJECTIVES: We explored the effects of dopamine-replacement drugs on multi-muscle synergies stabilizing center of pressure coordinate and their adjustments prior to a self-triggered perturbation in patients with Parkinson's disease. We hypothesized that both synergy indices and synergy adjustments would be improved on dopaminergic drugs...
April 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28097208/muscle-synergies-after-stroke-are-correlated-with-perilesional-high-gamma
#15
Jason Godlove, Tanuj Gulati, Ben Dichter, Edward Chang, Karunesh Ganguly
Movements can be factored into modules termed "muscle synergies". After stroke, abnormal synergies are linked to impaired movements; however, their neural basis is not understood. In a single subject, we examined how electrocorticography signals from the perilesional cortex were associated with synergies. The measured synergies contained a mix of both normal and abnormal patterns and were remarkably similar to those described in past work. Interestingly, we found that both normal and abnormal synergies were correlated with perilesional high gamma...
December 2016: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28092265/the-fibronectin-synergy-site-re-enforces-cell-adhesion-and-mediates-a-crosstalk-between-integrin-classes
#16
Maria Benito-Jardón, Sarah Klapproth, Irene Gimeno-LLuch, Tobias Petzold, Mitasha Bharadwaj, Daniel J Müller, Gabriele Zuchtriegel, Christoph A Reichel, Mercedes Costell
Fibronectin (FN), a major extracellular matrix component, enables integrin-mediated cell adhesion via binding of α5β1, αIIbβ3 and αv-class integrins to an RGD-motif. An additional linkage for α5 and αIIb is the synergy site located in close proximity to the RGD motif. We report that mice with a dysfunctional FN-synergy motif (Fn1(syn/syn)) suffer from surprisingly mild platelet adhesion and bleeding defects due to delayed thrombus formation after vessel injury. Additional loss of β3 integrins dramatically aggravates the bleedings and severely compromises smooth muscle cell coverage of the vasculature leading to embryonic lethality...
January 16, 2017: ELife
https://www.readbyqxmd.com/read/28031401/segmental-specificity-in-belly-dance-mimics-primal-trunk-locomotor-patterns
#17
Marilee M Nugent, Theodore E Milner
Belly dance was used to investigate control of rhythmic undulating trunk movements in humans. Activation patterns in lumbar erector spinae muscles were recorded using surface electromyography at four segmental levels spanning T10 to L4. Muscle activation patterns for movement tempos of 2 Hz, 3 Hz, and as fast as possible (up to 6 Hz) were compared to test the hypothesis that frequency modulates muscle timing, causing pattern changes analogous to gait transitions. Groups of trained and untrained female subjects were compared to test the hypothesis that experience modifies muscle coordination patterns and the capacity for selective motion of spinal segments...
March 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28026778/proactive-selective-inhibition-targeted-at-the-neck-muscles-this-proximal-constraint-facilitates-learning-and-regulates-global-control
#18
Ian Loram, Brian Bate, Peter Harding, Ryan Cunningham, Alison Loram
While individual muscle function is known, the sensory and motor value of muscles within the whole-body sensorimotor network is complicated. Specifically, the relationship between neck muscle action and distal muscle synergies is unknown. This work demonstrates a causal relationship between regulation of the neck muscles and global motor control. Studying violinists performing unskilled and skilled manual tasks, we provided ultrasound feedback of the neck muscles with instruction to minimize neck muscle change during task performance and observed the indirect effect on whole-body movement...
December 21, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28018193/are-modular-activations-altered-in-lower-limb-muscles-of-persons-with-multiple-sclerosis-during-walking-evidence-from-muscle-synergies-and-biomechanical-analysis
#19
Tiziana Lencioni, Johanna Jonsdottir, Davide Cattaneo, Alessandro Crippa, Elisa Gervasoni, Marco Rovaris, Emilio Bizzi, Maurizio Ferrarin
Background: Persons with Multiple Sclerosis frequently have gait deficits that lead to diminished activities of daily living. Identification of motoneuron activity patterns may elucidate new insight into impaired locomotor coordination and underlying neural systems. The aim of the present study was to investigate muscle synergies, identified by motor modules and their activation profiles, in persons with Multiple Sclerosis (PwMS) during walking compared to those of healthy subjects (HS), as well as, exploring relationship of muscle synergies with walking ability of PwMS...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28004203/aging-effect-on-muscle-synergies-in-stepping-forth-during-a-forward-perturbation
#20
Yun Wang, Kazuhiko Watanabe, Tadayoshi Asaka
PURPOSE: We explored changes in muscle interactions during healthy aging as a window into neural control strategies of postural preparation to action/perturbation. In particular, we quantified the strength of multi-muscle synergies stabilizing the center of pressure (COP) displacement during the preparation for making a step associated with support surface translations. METHODS: Young and elderly subjects were required to make a step in response to support surface perturbations...
December 21, 2016: European Journal of Applied Physiology
keyword
keyword
67019
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"