Distributed stimulation increases force elicited with functional electrical stimulation

刺激 等长运动 功能性电刺激 电极 三角形曲线 肌肉疲劳 生物医学工程 肌电图 神经科学 材料科学 医学 物理医学与康复 化学 解剖 心理学 内科学 物理化学
作者
Alie J Buckmire,Danielle R. Lockwood,Cynthia J Doane,Andrew J. Fuglevand
出处
期刊:Journal of Neural Engineering [IOP Publishing]
卷期号:15 (2): 026001-026001 被引量:14
标识
DOI:10.1088/1741-2552/aa9820
摘要

Abstract Objective . The maximum muscle forces that can be evoked using functional electrical stimulation (FES) are relatively modest. The reason for this weakness is not fully understood but could be partly related to the widespread distribution of motor nerve branches within muscle. As such, a single stimulating electrode (as is conventionally used) may be incapable of activating the entire array of motor axons supplying a muscle. Therefore, the objective of this study was to determine whether stimulating a muscle with more than one source of current could boost force above that achievable with a single source. Approach . We compared the maximum isometric forces that could be evoked in the anterior deltoid of anesthetized monkeys using one or two intramuscular electrodes. We also evaluated whether temporally interleaved stimulation between two electrodes might reduce fatigue during prolonged activity compared to synchronized stimulation through two electrodes. Main results . We found that dual electrode stimulation consistently produced greater force (~50% greater on average) than maximal stimulation with single electrodes. No differences, however, were found in the fatigue responses using interleaved versus synchronized stimulation. Significance . It seems reasonable to consider using multi-electrode stimulation to augment the force-generating capacity of muscles and thereby increase the utility of FES systems.
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