Closed loop control of ankle position using muscle afferent feedback with functional neuromuscular stimulation

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Publication Type Journal Article
School or College College of Engineering
Department Bioengineering
Creator Horch, Kenneth W.
Other Author Yoshida, Ken
Title Closed loop control of ankle position using muscle afferent feedback with functional neuromuscular stimulation
Date 1996
Description This paper describes a closed-loop functional neuromuscular stimulation system that uses afferent neural activity from muscle spindle fibers as feedback for controlling position of the ankle joint. Ankle extension against a load was effected by neural stimulation through a dual channel intrafascicular electrode of a fascicle of the tibial nerve that innervated the gastrocnemius muscle. Ankle joint angle was estimated from recordings of tibialis anterior and lateral gastrocnemius spindle fiber activity made with dual channel intrafascicular electrodes. Experiments were conducted in neurally intact anesthetized cats and in unanesthetized decerebrate cats to demonstrate the feasibility of this system. The system was able to reach and maintain a fixed target ankle position in the presence of a varying external moment ranging in magnitude between 7.3 and 22 N-cm opposing the action of the ankle extensor, as well as track a sinusoidal target ankle position up to a frequency of 1 Hz in the presence of a constant magnitude 22- or 37-N-cm external moment.
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Volume 43
Issue 2
Subject Neuromuscular stimulation; Functional neuromuscular stimulation (FNS); Neural electrodes
Subject MESH Paralysis; Muscle Spindles; Neural Conduction
Language eng
Bibliographic Citation Yoshida, K. & Horch. K. W. (1996). Closed loop control of ankle position using muscle afferent feedback with functional neuromuscular stimulation. IEEE Transcationson Biomedical Engineeing, 43(2).
Rights Management (c) Institute of Electrical and Electronics Engineers (IEEE)
Format Medium application/pdf
Format Extent 1,123,490 Bytes
Identifier ir-main,3839
ARK ark:/87278/s6t44b74
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 702857
Reference URL https://collections.lib.utah.edu/ark:/87278/s6t44b74