Walking with a powered ankle-foot orthosis: the effects of actuation timing and stiffness level on healthy users

Journal of Neuroengineering and Rehabilitation
Marta MoltedoCarlos Rodriguez-Guerrero

Abstract

In the last decades, several powered ankle-foot orthoses have been developed to assist the ankle joint of their users during walking. Recent studies have shown that the effects of the assistance provided by powered ankle-foot orthoses depend on the assistive profile. In compliant actuators, the stiffness level influences the actuator's performance. However, the effects of this parameter on the users has not been yet evaluated. The goal of this study is to assess the effects of the assistance provided by a variable stiffness ankle actuator on healthy young users. More specifically, the effect of different onset times of the push-off torque and different actuator's stiffness levels has been investigated. Eight healthy subjects walked with a unilateral powered ankle-foot orthosis in several assisted walking trials. The powered orthosis was actuated in the sagittal plane by a variable stiffness actuator. During the assisted walking trials, three different onset times of the push-off assistance and three different actuator's stiffness levels were used. The metabolic cost of walking, lower limb muscles activation, joint kinematics, and gait parameters measured during different assisted walking trials were compared to the ones measure...Continue Reading

References

Oct 1, 1995·Journal of Biomechanics·G Wu, P R Cavanagh
Mar 19, 2002·The Breast Journal·George H Sakorafas, Adelais G Tsiotou
Apr 8, 2004·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Joaquin A Blaya, Hugh Herr
Aug 6, 2005·Journal of Applied Biomechanics·Daniel P FerrisBlake Hannaford
Aug 16, 2005·Gait & Posture·Daniel P FerrisAmmanath Peethambaran
Feb 6, 2007·Journal of Biomechanics·Keith E Gordon, Daniel P Ferris
May 18, 2007·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·David M Rouffet, Christophe A Hautier
Dec 25, 2007·Journal of Neuroengineering and Rehabilitation·Stephen M CainDaniel P Ferris
Apr 22, 2008·The Journal of Experimental Biology·Gregory S Sawicki, Daniel P Ferris
Oct 8, 2008·Gait & Posture·Pei-Chun Kao, Daniel P Ferris
Dec 18, 2008·The Journal of Experimental Biology·Gregory S Sawicki, Daniel P Ferris
Feb 13, 2009·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Catherine R Kinnaird, Daniel P Ferris
Nov 3, 2009·Journal of Biomechanics·Pei-Chun KaoDaniel P Ferris
May 3, 2011·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Yumna Albertus-KajeeMichael I Lambert
Jun 3, 2014·Journal of Neuroengineering and Rehabilitation·Luke M MooneyHugh M Herr
Nov 5, 2014·Journal of Neuroengineering and Rehabilitation·Luke M MooneyHugh M Herr
Jul 15, 2015·Journal of Applied Physiology·Rachel W Jackson, Steven H Collins
Nov 6, 2015·Journal of Neuroengineering and Rehabilitation·Jeffrey R KollerC David Remy
Feb 18, 2016·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Wietse van DijkHerman van der Kooij
Dec 5, 2016·Gait & Posture·S GalleD De Clercq
Apr 30, 2017·Journal of Neuroengineering and Rehabilitation·Samuel GalleDirk De Clercq
Jun 24, 2017·Science·Juanjuan ZhangSteven H Collins
Jun 28, 2017·Journal of Neuroengineering and Rehabilitation·Philippe MalcolmConor J Walsh
Aug 18, 2017·IEEE ... International Conference on Rehabilitation Robotics : [proceedings]·Ling-Fung YeungKai-Yu Tong
Aug 18, 2017·IEEE ... International Conference on Rehabilitation Robotics : [proceedings]·Marta MoltedoDirk Lefeber
May 29, 2018·Journal of Neuroengineering and Rehabilitation·Jeffrey R KollerDaniel P Ferris
Aug 11, 2018·Journal of Neuroengineering and Rehabilitation·Philippe MalcolmDirk De Clercq
Oct 5, 2018·Journal of Neuroengineering and Rehabilitation·Marta MoltedoDirk Lefeber

❮ Previous
Next ❯

Software Mentioned

[UNK] University Edition
MACCEPA

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.