You are better off running than walking revisited: Does an acute vestibular imbalance affect muscle synergies?

Fabre-Adinolfi, Dimitri; Parietti‐Winkler, Cécile; Pierret, Jonathan; Lassalle-Kinic, Benoîte; Frère, Julien

doi:10.1016/j.humov.2018.10.010

Cited by 8 publications

(10 citation statements)

References 49 publications

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“…Indeed, the vestibular contribution to gait variability, which is a predictive marker for falls, declines with faster walking and running (41). Therefore, their balance would be better when running because dynamic balance strategies are different at low and high speeds (41)(42)(43)(44)(45).…”

Section: Discussion Locomotion Exploration and Velocity Of Uvn Ratsmentioning

confidence: 99%

Quantitative Evaluation of a New Posturo-Locomotor Phenotype in a Rodent Model of Acute Unilateral Vestibulopathy

et al. 2020

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Vestibular pathologies are difficult to diagnose. Existing devices make it possible to quantify and follow the evolution of posturo-locomotor symptoms following vestibular loss in static conditions. However, today, there are no diagnostic tools allowing the quantitative and spontaneous analysis of these symptoms in dynamic situations. With this in mind, we used an open-field video tracking test aiming at identifying specific posturo-locomotor markers in a rodent model of vestibular pathology. Using Ethovision XT 14 software (Noldus), we identified and quantified several behavioral parameters typical of unilateral vestibular lesions in a rat model of vestibular pathology. The unilateral vestibular neurectomy (UVN) rat model reproduces the symptoms of acute unilateral peripheral vestibulopathy in humans. Our data show deficits in locomotion velocity, distance traveled and animal mobility in the first day after the injury. We also highlighted alterations in several parameters, such as head and body acceleration, locomotor pattern, and position of the body, as well as "circling" behavior after vestibular loss. Here, we provide an enriched posturo-locomotor phenotype specific to full and irreversible unilateral vestibular loss. This test helps to strengthen the quantitative evaluation of vestibular disorders in unilateral vestibular lesion rat model. It may also be useful for testing pharmacological compounds promoting the restoration of balance. Transfer of these novel evaluation parameters to human pathology may improve the diagnosis of acute unilateral vestibulopathies and could better follow the evolution of the symptoms upon pharmacological and physical rehabilitation.

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Section: Discussion Locomotion Exploration and Velocity Of Uvn Ratsmentioning

confidence: 99%

Quantitative Evaluation of a New Posturo-Locomotor Phenotype in a Rodent Model of Acute Unilateral Vestibulopathy

et al. 2020

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“…Studies on the reliability of muscle synergy extraction in relation to sport activities are scarce but nevertheless present in the considered literature [ 108 , 116 , 127 , 128 ]. The most common family of algorithms used to reduce the dimensionality of the data was NMF [ 107 , 108 , 110 – 114 , 116 – 125 , 127 – 133 , 135 – 137 ], with a few studies also using PCA to extract synergistic muscle activations [ 75 , 109 , 126 , 134 ]. The total number of muscle activities recorded varied heavily across the considered studies.…”

Section: Resultsmentioning

confidence: 99%

“…The total number of muscle activities recorded varied heavily across the considered studies. We found a range in the number of muscles recorded across these studies, including one to eight [ 108 , 109 , 124 , 126 , 131 , 133 ], between nine and 16 [ 75 , 107 , 110 – 114 , 116 , 119 , 121 – 123 , 125 , 128 , 130 , 132 , 134 – 137 ], and between 16 and 25 muscles [ 117 , 118 , 120 , 127 , 129 ]. Bilateral recordings were less common [ 107 , 108 , 117 , 119 , 129 ] than ipsilateral [75, 109-114, 116, 118, 120–128, , 128, 130–137].…”

Section: Resultsmentioning

confidence: 99%

“…Perturbation has to be intended as a change of movement, as reported in the Oxford dictionary. Perturbations can be [83,84,89,90,92,93,95,96,111,113,116,118,123,126,127,129,130,133,136] Resistance training or weightlifting 13 [78,80,81,85,86,94,97,102,103,105,108,125,128] 11 Applied Bionics and Biomechanics used to uncover motor control processes that under unperturbed circumstances would not be available for observation [162]. Of the six studies that dealt with perturbations, four have been published after March 2017, indicating an increasing interest in the topic by the sport science community [97,102,103,110,121,136].…”

Section: Sport Application With Emgmentioning

confidence: 99%

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Sport Biomechanics Applications Using Inertial, Force, and EMG Sensors: A Literature Overview

Taborri

Keogh

Kos

et al. 2020

Applied Bionics and Biomechanics

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In the last few decades, a number of technological developments have advanced the spread of wearable sensors for the assessment of human motion. These sensors have been also developed to assess athletes’ performance, providing useful guidelines for coaching, as well as for injury prevention. The data from these sensors provides key performance outcomes as well as more detailed kinematic, kinetic, and electromyographic data that provides insight into how the performance was obtained. From this perspective, inertial sensors, force sensors, and electromyography appear to be the most appropriate wearable sensors to use. Several studies were conducted to verify the feasibility of using wearable sensors for sport applications by using both commercially available and customized sensors. The present study seeks to provide an overview of sport biomechanics applications found from recent literature using wearable sensors, highlighting some information related to the used sensors and analysis methods. From the literature review results, it appears that inertial sensors are the most widespread sensors for assessing athletes’ performance; however, there still exist applications for force sensors and electromyography in this context. The main sport assessed in the studies was running, even though the range of sports examined was quite high. The provided overview can be useful for researchers, athletes, and coaches to understand the technologies currently available for sport performance assessment.

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“…For example, visual inputs are used in the process of planning locomotion to create a model of the environment in which the walking would occur, while proprioception is essential during the execution of the movement to update the feedforwards commands derived from the visual inputs (Bard et al, 1995;Sainburg et al, 1995). Regarding body-based cues, it seems that during walking, vestibular signals are downregulated (Brandt et al, 1999;Pfaff, 2013;Fabre-Adinolfi et al, 2018), whereas proprioception dominates the pattern of muscle activation (Science and 1985). Overall, neural networks controlling posture and gait are highly dependent on vestibular inputs during slow gait and shift their dependency towards proprioception with increased gait speed.…”

Section: Discussionmentioning

confidence: 99%

Vision affects gait speed but not patterns of muscle activation during inclined walking – a virtual reality study

Benady

Zadik

Ben-Gal

et al. 2020

Preprint

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While walking, our locomotion is affected by and adapts to the environment based on vision-based and body-based (vestibular and proprioception) cues, all contributing to an “Internal Model of Gravity”. During surface inclination transitions, we modulate gait to counteract gravitational forces by braking during downhill walking to avoid uncontrolled acceleration or by exerting effort to avoid deceleration while walking uphill. In this study, we investigated the role of vision in gait modulation during surface inclination transitions by using an immersive large-scale Virtual Reality (VR) system equipped with a self-paced treadmill and projected visual scenes that allowed us to modulate physical-visual inclinations congruence parametrically. Gait speed and leg muscle electromyography (EMG) were measured in 12 healthy young adults. In addition, the magnitude of subjective visual misperception of verticality was measured by the rod and frame test. During virtual (non-veridical) inclination transitions, vision modulated gait speed after transitions by (i) slowing down to counteract the excepted gravitational ‘boost’ in virtual downhill inclinations and by (ii) speeding up to counteract the expected gravity resistance in virtual uphill inclinations. These gait speed modulations were reflected in muscle activation intensity changes and associated with subjective visual verticality misperception. However, temporal patterns of muscle activation, which are significantly affected by real gravitational inclination transitions, were not affected by virtual (visual) inclination transitions. Our results delineate the contribution of vision to functional locomotion on uneven surfaces and may lead to enhanced rehabilitation strategies for neurological disorders affecting movement.Significance statementA crucial component of successful locomotion is maintaining balance and speed while walking on uneven surfaces. In order to reach successful locomotion, an individual must utilize multisensory integration of visual, gravitational, and proprioception cues. The contribution of vision to this process is still unclear, thus we used a fully immersive virtual reality treadmill setup allowing us to manipulate visual (virtual) and gravitational (real) surface inclinations independently during locomotion of healthy adults. While vision modulated gait speed for a short period after inclination transitions and this was predictive of individual’s visual dependency, muscle activation patterns were only affected by gravitational surface inclinations, not by vision. Understanding the vision’s contribution to successful locomotion may lead to improved rehabilitation for movement disorders.

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You are better off running than walking revisited: Does an acute vestibular imbalance affect muscle synergies?

Cited by 8 publications

References 49 publications

Quantitative Evaluation of a New Posturo-Locomotor Phenotype in a Rodent Model of Acute Unilateral Vestibulopathy

Quantitative Evaluation of a New Posturo-Locomotor Phenotype in a Rodent Model of Acute Unilateral Vestibulopathy

Sport Biomechanics Applications Using Inertial, Force, and EMG Sensors: A Literature Overview

Vision affects gait speed but not patterns of muscle activation during inclined walking – a virtual reality study

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