Trunk sway measures of postural stability during clinical balance tests: effects of a unilateral vestibular deficit

Allum, J.H.J.; Adkin, Allan L.; Carpenter, Mark G.; Held-Ziółkowska, Marta; Honegger, F.; Pierchała, Katarzyna

doi:10.1016/s0966-6362(01)00132-1

Cited by 157 publications

(89 citation statements)

References 30 publications

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“…The TWT test has been utilized as the dynamic walking balance component of several validated test batteries regarding fall prediction in the elderly, such as the Fullerton Advanced Balance Scale [3,4], the LIFE pilot study protocol [5], Good Walkers Test [6], and the EPIDOS Prospective Study balance protocol [7]. The TWT has been utilized as a test of dynamic walking balance to determine gait stability and pathological quantification including prediction of falls in the elderly population [3,9,[34][35][36][37][38][39][40], diagnose ataxia and other vestibular disorders [29,41], test for vertigo [42], tropical ataxic neuropathy [43], traumatic brain injury [40], peripheral neuropathy [44], and functional mobility [45][46][47][48]. The TWT is considered a clinically efficacious test of dynamic balance in medical text books [29,49] and for research purposes [2,50].…”

Section: Introductionmentioning

confidence: 99%

Concurrent validation of the tandem walk test as a measure of dynamic walking balance in a healthy population

Robertson¹,

Gregory²

2017

Phys Ther Rehabil

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Background: The purpose of this study was to determine the possible concurrent validity of the tandem walk test as a measure of dynamic walking balance. Methods: Forty-nine healthy participants, age range 20-75 years (mean age 40.1 ± 17.1 years), performed the ten step tandem walk test and two clinical tests of dynamic balance using the Biodex Balance System (Biodex Medical Systems, Shirley, NY) dynamic limits of stability protocol and measures of gait variability assessed through gait center of pressure, spatial, and temporal parameters derived from an instrumented treadmill (h/p/cosmos sports & medical gmbh, Nussdorf-Traunstein, Germany; Zebris FDM-T, Isny im Allgau, Germany). Results: A moderate-high correlation was demonstrated between the ten step tandem walk test eyes open and measures of gait variability, step width (r=0.64 p<0.05) and step time variability ( r=0.67 p<0.05), age (r=0.69 p<0.05), and Biodex Balance System dynamic limits of stability (r=0.81 p<0.05). A moderate relationship was found between the ten step tandem walk test eyes open and measures of gait center of pressure variability (r=0.52 p<0.05). Correlation coefficient values between the ten step tandem walk test eyes open and Biodex Balance System dynamic limits of stability, gait temporal, center of pressure, and spatial parameters demonstrated increased strength when adjusted for age. Conclusion: The ten step tandem walk test demonstrated a moderate to high relationship with clinical tests of dynamic balance: Biodex Balance System dynamic limits of stability and gait center of pressure, spatial, and time parameters in a healthy population demonstrating concurrent validity as an objective measure of dynamic walking balance in a healthy population between the ages of 20 and 75 years.

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Section: Introductionmentioning

confidence: 99%

Concurrent validation of the tandem walk test as a measure of dynamic walking balance in a healthy population

Robertson¹,

Gregory²

2017

Phys Ther Rehabil

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“…The goal of the reflex is to maintain the head in an upright position [3]. Together, the vestibulo-collic and the vestibulo-spinal reflexes are responsible for self-balancing control [205,206,174,2,131].…”

Section: Roles Of Vestibular Systemmentioning

confidence: 99%

“…The equations of motion (2.7) can be modified for the planar case if the head and pendulum's rotation are restricted to one plane. Then, the rotation matrix of the head is of the form [2,3] 0 r h [3,2] r h [3,3]   where r h[·,·] is an element of the rotation matrix. Noting that r h [2,2] = r h [3,3] and r h [2,3] = −r h [3,2] and applying the same modifications to I R S in (2.7) we obtain the following equations of motion in plane expressed in scalar form,…”

Section: Planar Casementioning

confidence: 99%

Modeling Verticality Estimation During Locomotion

Farkhatdinov

Michalska

Berthoz

et al. 2013

Romansy 19 – Robot Design, Dynamics and Control

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In this thesis, a nonlinear model of the vestibular system is proposed, with special reference to humans and other locomoting animals. The vestibular system is essential for stable locomotion since it provides idiothetic measurements of spatial orientation that are needed for postural control. The model was constructed from general considerations regarding the Newton-Euler dynamics governing the three-dimensional movements of bodies constrained to oscillate in non-inertial frames, such as the otoliths, which were modeled as spherical damped pendula. Two configurations were considered. The medial model considered only one inner ear located in the center of a head. The lateral model considered two inner ears located laterally with respect to the center of rotation of the head. The differences between these two models were analyzed and the importance of having two vestibular organs discussed. To this end, a nonlinear algebraic observability test was used to verify whether the reconstruction of the head orientation with respect to the gravitational vertical was possible from otoliths measurements only. It could be shown that in order for the head vertical orientation to be observable, the head had to be stabilized during locomotion. Moreover, it was shown that the gravitoinertial ambiguity inherent to inertial idiothetic sensing could be resolved if the head was horizontally stabilized. These results were applied to solve the head vertical orientation estimation problem in the linearized case (Luenberger observer, Kalman filter) as well as in the nonlinear case (Extended Kalman filter, Newton method based observation). These observers were designed and tested in simulations. The simulations indicated that the estimation errors were smaller and the observers converged faster when head was stabilized during locomotion, leading to a nonlinear, combined observation-control system that could be stabilized with respect to the gravitational vertical based on no other information than the prior knowledge of the Newton-Euler dynamics. The results were further tested with a specifically designed experimental setup that comprised an actuated gimbal mechanism to represent the head-neck articulation and a liquid-based inclinometer that represented the otoliths organs. The findings derived from this research would be helpful for analyzing spatial perception in humans and animals, and for improving the perceptual capabilities of robotic systems, such as humanoid robots, rough terrain vehicles, or free-moving drones.Keywords: vestibular system, head-neck system, nonlinear system, observation, estimation, verticality, spatial perception, locomotion, humanoid robot. 3 RésuméDans cette thèse, nous proposons un modèle non-linéaire du système vestibulaire, en particulier chez l'humain et autres animaux mobiles. Le système vestibulaire est essentiel pour une locomotion stable dans la mesure où il fournit des mesures idiothétiques d'orientation spatiale nécessairesà la stabilité posturale. Le développement du modèle est basé sur l...

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“…The use of gyroscopes for assessing trunk rotations can identify a balance disorder and possibly distinguish between diVerent types of balance disorder (Allum et al 2001(Allum et al , 2005. Large leftright rotations (i.e., "roll") of the trunk as measured by a gyroscope during walking has been used to distinguish older fallers from non-fallers (de Hoon et al 2003).…”

Section: Assessment Of Balance and Gaitmentioning

confidence: 99%

Mobility assessment in older people: new possibilities and challenges

2007

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A major challenge for researchers and clinicians who address health issues in the ageing population is to monitor functioning, and to timely initiate interventions that aim to prevent loss of functional abilities and to improve the quality of life of older people. With the progress of technologies in the last decades, methods have become available that use body Wxed sensors (BFS) to measure aspects of human performance under real-life conditions. These methods are based on the use of miniaturised and integrated sensors in combination with lightweight, small measuring devices that both can be carried on the body without interfering with normal behaviour. This paper addresses the potential relevance of new technology for monitoring motor function in older people, thereby speciWcally focusing on mobility assessment. After a short introduction with background information about BFS based technology, this paper identiWes areas of particular relevance, and discusses the application of ambulatory techniques for long-term monitoring of daily physical activity, fall detectors, fall risk evaluation, and assessment of motor performance such as gait and balance control. Examples are given how these techniques can become clinically relevant, particularly in the context of fall interventions for older people.

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Trunk sway measures of postural stability during clinical balance tests: effects of a unilateral vestibular deficit

Cited by 157 publications

References 30 publications

Concurrent validation of the tandem walk test as a measure of dynamic walking balance in a healthy population

Concurrent validation of the tandem walk test as a measure of dynamic walking balance in a healthy population

Modeling Verticality Estimation During Locomotion

Mobility assessment in older people: new possibilities and challenges

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