Multichannel SEMG in clinical gait analysis: A review and state-of-the-art

Frigo, C.; Crenna, P.

doi:10.1016/j.clinbiomech.2008.07.012

Cited by 165 publications

(106 citation statements)

References 102 publications

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“…It supports clinicians with the objective assessment of muscular function during walking. Moreover, it provides insight on neural control in terms of paretic and non-neural components, spasticity and co-contraction [1]. For example, in Ref.…”

Section: Introductionmentioning

confidence: 99%

Normative EMG activation patterns of school-age children during gait

Agostini

Nascimbeni²,

Gaffuri³

et al. 2010

Gait & Posture

108

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Gait analysis is widely used in clinics to study walking abnormalities for surgery planning, definition of rehabilitation protocols, and objective evaluation of clinical outcomes. Surface electromyography allows the study of muscle activity non-invasively and the evaluation of the timing of muscle activation during movement. The aim of this study was to present a normative dataset of muscle activation patterns obtained from a large number of strides in a population of 100 healthy children aged 6-11 years. The activity of Tibialis Anterior, Lateral head of Gastrocnemius, Vastus Medialis, Rectus Femoris and Lateral Hamstrings on both lower limbs was analyzed during a 2.5-min walk at free speed. More than 120 consecutive strides were analyzed for each child, resulting in approximately 28,000 strides. Onset and offset instants were reported for each observed muscle. The analysis of a high number of strides for each participant allowed us to obtain the most recurrent patterns of activation during gait, demonstrating that a subject uses a specific muscle with different activation modalities even in the same walk. The knowledge of the various activation patterns and of their statistics will be of help in clinical gait analysis and will serve as reference in the design of future gait studies.

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Section: Introductionmentioning

confidence: 99%

Normative EMG activation patterns of school-age children during gait

Agostini

Nascimbeni²,

Gaffuri³

et al. 2010

Gait & Posture

108

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“…The interest of studying the C mechanism between the agonist and antagonist muscles at the joint level is related to motor control issues (Schumway-Cook et al, 2007) and is a tool for detecting pathophysiological mechanisms (Frigo et al, 2009). To selected rehabilitation strategies in subjects with ankle muscle dysfunction (like stroke subjects), it is essential to define how these subjects deviate from normal patterns (Orendurff et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Ankle dynamic in stroke patients: Agonist vs. antagonist muscle relations

Silva

Sousa

Tavares

et al. 2012

Somatosensory & Motor Research

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Introduction: Atypical ankle patterns of muscle activity during gait are commonly reported in patients with stroke. These findings can be due to changes between tibialis anterior (TA) and soleus (SOL) coactivation mechanisms. Objective: To compare the electromyographic activity (EMGa) of SOL and TA muscles and antagonist coactivation (C) level in the contralateral (CONTRA) and ipsilateral (IPSI) limbs to the side of the stroke lesion during stance phase of the gait cycle. Methods: Twelve subjects with a stroke episode participated in this study. The electromyographic signal of TA and SOL and ground reaction forces were acquired while subjects walked at their self-selected speed. Values of ground reaction forces were used to divide the stance phase of gait into initial contact, midstance and terminal stance. In each subphase the magnitude of TA and SOL was calculated as well as the level of the antagonist C. Results: Although no statistical differences were found, mean values of SOL EMGa were lower in the IPSI in all stance phases in relation to the CONTRA limb, and the opposite was observed in the TA EMGa. Moreover, higher mean levels of antagonist C were only found during initial contact sub-phase in CONTRA limb and in the other sub-phases in the IPSI limb. Besides, statistical differences were observed only during midstance. Conclusion: In stroke subjects the antagonist C level during midstance of gait my reflected the dysfunction of the neuronal system over the IPSI limb.

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“…Better classification of these patients into subgroups could help better treatment alternatives. Loss of selective activation of the muscles (co-contraction) is one of the main features of patients with abnormal muscle tone [2]. Our results show, that the number of muscles abnormally affected during velocity and popliteal tests varied between the patients (tables 1-3).…”

Section: Discussionmentioning

confidence: 58%

Use of instrumented spasticity tests in clinical applications. Preliminary results

Szczerbik

Kalinowska

Graff

et al. 2015

Biomedical Human Kinetics

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SummaryStudy aim: the aim of the study was to evaluate whether the use of instrumented versions of spasticity tests would provide us with clinically more useful information on the patient's status. Material and methods: the study included 19 children, 8-17 years old: 7 girls and 12 boys. Pendulum, velocity, and popliteal tests were performed using the Vicon system (knee joint angle, 8 muscles EMG). Dynamic movement ranges of the knee joint during velocity and popliteal tests (ROM), indices of the pendulum test, and muscle activity in dependence of velocity of movement (MA, MAST) were calculated. Correlation coefficients between ROM, Vmax, MA, and MAST were calculated to show whether instrumentation of clinical tests can validate the patient's status more precisely. Results: Vmax value from the pendulum test does not always correlate with ROM. Scores of MA and MAST do not correlate with ROM. Vmax generally does not correlate with MA or MAST. Conclusions: ROM is one of the most important parameters reflecting the level of spasticity but it is not sensitive enough to detect small changes in the patient's status. In that case, Vmax of the pendulum test and the number of activated muscles in velocity and popliteal tests could become important tools to assess changes in spasticity level, especially when motion systems are more commonly available.

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Multichannel SEMG in clinical gait analysis: A review and state-of-the-art

Cited by 165 publications

References 102 publications

Normative EMG activation patterns of school-age children during gait

Normative EMG activation patterns of school-age children during gait

Ankle dynamic in stroke patients: Agonist vs. antagonist muscle relations

Use of instrumented spasticity tests in clinical applications. Preliminary results

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