Method for evoking a trip-like response using a treadmill-based perturbation during locomotion

Sessoms, Pinata H.; Wyatt, Marilynn; Grabiner, Mark D.; Collins, John D.; Kingsbury, Trevor; Thesing, Nancy; Kaufman, Kenton R.

doi:10.1016/j.jbiomech.2013.10.035

Cited by 55 publications

(48 citation statements)

References 16 publications

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“…The walking speed for each subject was controlled for leg length by normalizing to a Froude number (FR) of 0.2, where FR = v 2 /gl, v is the walking speed, g is the gravitational constant, and l is the leg length [1]. The speed was based on the overground self-selected walking speed of subjects with amputation previously studied in the NMCSD Motion Analysis Laboratory [44]. In addition, the speed was approximately 2% slower than their self-selected walking speed to increase the likelihood that subjects could maintain a constant speed for the duration of the perturbation trial (approximately 15 minutes) without fatigue.…”

Section: Methodsmentioning

confidence: 99%

“…After the warm-up period, while subjects walked for 5 to 6 minutes at their normalized velocity [44], six perturbations (three prosthetic, three nonprosthetic) were delivered in a randomized order. During the perturbation testing, motion capture data were recorded from 34 retroreflective markers placed on the subject using a modified Helen Hayes marker set configuration [19].…”

Section: Methodsmentioning

confidence: 99%

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Task-specific Fall Prevention Training Is Effective for Warfighters With Transtibial Amputations

Kaufman

Wyatt

Sessoms

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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Background Key factors limiting patients with lower extremity amputations to achieve maximal functional capabilities are falls and fear of falling. A task-specific fall prevention training program has successfully reduced prospectively recorded trip-related falls that occur in the community by the elderly. However, this program has not been tested in amputees. Questions/purposes In a cohort of unilateral transtibial amputees, we aimed to assess effectiveness of a falls prevention training program by (1) quantifying improvements in trunk control; (2) measuring responses to a standardized perturbation; and (3) demonstrating retention at 3 and 6 months after training. Second, we collected patientreported outcomes for balance confidence and falls control. Methods Fourteen male military service members (26 ± 3 years) with unilateral transtibial amputations and who had been walking without an assistive device for a median of 10 months (range, 2-106 months) were recruited to participate in this prospective cohort study. The training program used a microprocessor-controlled treadmill designed to deliver task-specific postural perturbations that simulated a trip. The training consisted of six 30-minute sessions delivered over a 2-week period, during which task difficulty, including perturbation magnitude, increased as the patient's ability progressed. Training effectiveness was assessed using a perturbation test in an This study was funded by the Department of Defense Grant Number W81X-WH-11-2-0058 (Log No. DM090896) and the Navy Bureau of Medicine and Surgery, Wounded, Ill, and Injured Program. Approved for public release; distribution is unlimited. This research was conducted in compliance with all applicable federal regulations governing the protection of human subjects (protocol NMCSD.2001.003 and Protocol NHRC.2001.0031). The institution of one or more of the authors (MDG) has a patent on technology (ActiveStep TM ; Symbex, Lebanon, NH, USA) noted in this manuscript. One of the authors (MDG) is an inventor of the ActiveStep TM system but has no conflicts of interest to declare with regard to the present study. The views expressed are those of the authors and do not reflect the official policy or position of the Department of the Navy, Department of Defense, or the US Government. Clinical Orthopaedics and Related Research ®A Publication of The Association of Bone and Joint Surgeons® immersive virtual environment. The key outcome variables were peak trunk flexion and velocity, because trunk kinematics at the recovery step have been shown to be a determinant of fall likelihood. The patient-reported outcomes were also collected using questionnaires. The effectiveness of the rehabilitation program was also assessed by collecting data before perturbation training and comparing the key outcome parameters with those measured immediately after perturbation training (0 months) as well as both 3 and 6 months posttraining. Results Mean trunk flexion angle and velocity significantly improved after participating in the ...

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Task-specific Fall Prevention Training Is Effective for Warfighters With Transtibial Amputations

Kaufman

Wyatt

Sessoms

et al. 2014

Clinical Orthopaedics &Amp; Related Research

Self Cite

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“…Among them, the GRAIL system has shown exciting prospects both as an evaluative and rehabilitative system of adults affected by neurologic and orthopedic pathologies [19,20,21,22,23,24]. Few research groups developed VR applications for the gait treatment in post-stroke patients [19] as well as for the fall risk prevention in amputees and elders [23]. Recent results demonstrated improvements in gait performance, recovery of trunk movement and muscular reinforcement in amputees [10,25].…”

Section: Introductionmentioning

confidence: 99%

An Immersive Virtual Reality Platform to Enhance Walking Ability of Children with Acquired Brain Injuries

et al. 2017

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“…Additionally, treadmills with the capability of inducing slip perturbations are increasingly used in the field of fall prevention [14,[18][19][20][21]. It however remains unknown if individuals, when made aware of the impending slip during treadmill walking, would also adapt their gait pattern in response to the potential slip risk.…”

Section: Introductionmentioning

confidence: 99%

Adaptive gait responses to awareness of an impending slip during treadmill walking

2016

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Method for evoking a trip-like response using a treadmill-based perturbation during locomotion

Cited by 55 publications

References 16 publications

Task-specific Fall Prevention Training Is Effective for Warfighters With Transtibial Amputations

Task-specific Fall Prevention Training Is Effective for Warfighters With Transtibial Amputations

An Immersive Virtual Reality Platform to Enhance Walking Ability of Children with Acquired Brain Injuries

Adaptive gait responses to awareness of an impending slip during treadmill walking

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