NDLI: Control of the Lower Leg During Walking: A Versatile Model of the Foot

Content Provider	IEEE Xplore Digital Library
Author	Stefanovic, F. Popovic, D.B.
Copyright Year	2001
Abstract	An improved biomechanical model has been implemented for use in gait simulations and functional electrical stimulation (FES). The novelty includes longitudinal bending of the foot which implements geometrical changes that appear ldquohealthy-likerdquo during the stance phase of gait. The simulation uses optimal control which minimizes the activation of flexor and extensor muscles, as well as the tracking error. Correspondingly, the results of the bending foot model, contrasted against a rigid foot biomechanical model, show that torques in the knee during foot contact were as much as 36.9 Nm (46.1%) lower, while muscle excitation was on average 6.1% lower. The simulation also shows that the shank angle of the bending foot model was virtually identical to that of the rigid foot model. However, this model's worth is most prevalent in its use for stance phase control in individuals who use multichannel FES. Notably, it can also be used for simulating the gait of individuals who lack ankle articulation and use an active transfemoral prosthesis.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	7
File Size	1085221
Starting Page	63
Ending Page	69
File Format	PDF
ISSN	15344320
Volume Number	17
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-02-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Leg Legged locomotion Foot Muscles Neuromuscular stimulation Optimal control Error correction Knee Phase control Prosthetics simulation of walking Bending foot electrical stimulation optimal control
Content Type	Text
Resource Type	Article
Subject	Neuroscience Rehabilitation Internal Medicine Biomedical Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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