Development of a three-degrees-of-freedom moveable platform for providing postural perturbations

Chen, C. L.; Lee, J. Y.; Horng, Rong-Fang; Lou, Shu-Zon; Su, Fong Chin

doi:10.1243/09544119jeim482

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…A custom, computer-controlled, servomotor-driven, moveable platform provided forward/backward translational and toe up/toe down rotational perturbations [21]. The velocities of the platform movement were set at 500 mm/s for translations and 50 degree/s for rotations with a ramp onset and ramp offset acceleration/deceleration profile [22].…”

Section: Methodsmentioning

confidence: 99%

Effects of the type and direction of support surface perturbation on postural responses

Chen

Lou

et al. 2014

J NeuroEngineering Rehabil

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BackgroundPostural control is organized around a task goal. The two most frequently used types of tasks for postural control research are translational (translation along the anterior-posterior axis) and rotational (rotation in sagittal plane) surface perturbations. These types of perturbations rotate the ankle joint, causing different magnitudes and directions of body sway. The purpose of this study was to investigate the effects of the type (translation vs. rotation) and direction (forward/toe up vs. backward/toe down) of the perturbation on postural responses.MethodNineteen healthy subjects were tested with four perturbations, i.e., forward and backward translation and toe up and toe down rotation. The onset latency and magnitude of muscle activations, angular changes, and COM displacements were measured. In addition, the kinematic data were divided into two phases. The initial phase reflected the balance disturbance induced by the platform movement, and the reversal phase reflected the balance reaction.ResultsThe results showed that, in the initial phase, rotational perturbation induced earlier ankle movement and faster and larger vertical COM displacement, while translational and forward/toe up perturbations induced larger head and trunk angular change and faster and larger horizontal COM displacement. In the reversal phase, balance reaction was attained by multi-joint movements. Translational and forward/toe up perturbations that induced larger upper body instability evoked faster muscle activation as well as faster and larger hip or knee joint movements.ConclusionsThese findings provide insights into an appropriate support surface perturbation for the evaluation and training of balance.

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Section: Methodsmentioning

confidence: 99%

Effects of the type and direction of support surface perturbation on postural responses

Chen

Lou

et al. 2014

J NeuroEngineering Rehabil

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“…UP-balance provides perturbation (instability) during the whole period of the task. other instruments are dedicated to more stable situations [17,18,[22][23][24][25]37]. Therefore, we believe that UP-balance may be a challenging task for balance analysis and training, given the great instability provided, since postural control responses are related to environmental constraints and task demands [38].…”

Section: Discussionmentioning

confidence: 99%

The reliability of measures provided by the Unstable Platform for Balance Analysis in young adults with and without visual information

Leme¹,

Candido²,

Nascimento³

et al. 2021

Hum Mov.

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Purpose. The Unstable Platform for Balance Analysis (UP-balance) has been used in several studies to evaluate different situations of balance and constraints. However, the reliability of its measurements has not been analysed yet. Therefore, the present study investigated the reliability of the measures provided by UP-balance in young adults in bipedal posture with and without vision. Methods. For such analysis, 30 young adults, male and female (mean age: 22.9 years; SD = 3.8 years), performed 3 attempts of the task which consisted in maintaining balance on an UP-balance on a bipedal base for 20 seconds, with and without visual information, with perturbations in the medial-lateral and anterior-posterior directions.Results. The UP-balance variables presented high inter-trial reliability (Icc > 0.76; p < 0.05), except for balance time in the anterior-posterior direction and non-vision condition, which exhibited moderate inter-trial reliability (Icc = 0.73; p < 0.05). Conclusions. UP-balance seemed to be a reliable instrument for the analysis of balance in situations of instability on a base support.

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“…Several non-commercial robotic platforms have been recently designed to provide various patterns of mechanical perturbation [90][91][92][93][94]. Common approaches include unidirectional [95] or multidirectional [85,96,97] disturbances, such as rotational [93,[98][99][100][101] and translational perturbations [96,[102][103][104], or forces applied to specific body segments [105,106]. Abrupt perturbations allow the examination of reactive postural responses, whereas continuous and oscillatory perturbations are used for the assessment of anticipatory postural strategies [101,102,104,107,108].…”

Section: Static and Dynamic Posturographymentioning

confidence: 99%

Fifteen Years of Wireless Sensors for Balance Assessment in Neurological Disorders

Zampogna

Mileti

Palermo

et al. 2020

Sensors

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Balance impairment is a major mechanism behind falling along with environmental hazards. Under physiological conditions, ageing leads to a progressive decline in balance control per se. Moreover, various neurological disorders further increase the risk of falls by deteriorating specific nervous system functions contributing to balance. Over the last 15 years, significant advancements in technology have provided wearable solutions for balance evaluation and the management of postural instability in patients with neurological disorders. This narrative review aims to address the topic of balance and wireless sensors in several neurological disorders, including Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, stroke, and other neurodegenerative and acute clinical syndromes. The review discusses the physiological and pathophysiological bases of balance in neurological disorders as well as the traditional and innovative instruments currently available for balance assessment. The technical and clinical perspectives of wearable technologies, as well as current challenges in the field of teleneurology, are also examined.

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Development of a three-degrees-of-freedom moveable platform for providing postural perturbations

Cited by 9 publications

References 24 publications

Effects of the type and direction of support surface perturbation on postural responses

Effects of the type and direction of support surface perturbation on postural responses

The reliability of measures provided by the Unstable Platform for Balance Analysis in young adults with and without visual information

Fifteen Years of Wireless Sensors for Balance Assessment in Neurological Disorders

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