Swing-through gait with free-knees produced by surface functional electrical stimulation
Swing-through gait with free-knees produced by surface functional electrical stimulation
复制标题
表面功能性电刺激产生的自由膝摆动步态
DOI：
10.1038/sc.1996.2
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
B. Andrews
中科院分区：
文献类型：
--
作者：
B. Heller;M. Granat;B. Andrews
摇摆式步态通常是那些能够完成它的拐杖步行者的首选步态。然而，具有胸部病变的截瘫患者通常无法实现实用的（足够低的能量和足够快的）步态。采用功能性电刺激（FES）辅助三名T11、T11和T6胸部完全损伤的脊髓损伤（SCI）受试者以摆动步态行走。8个表面刺激通道用于双侧刺激膝伸肌、膝屈肌、髋伸肌和髋屈肌。刺激序列由计算机控制，该计算机根据传感器输入实施有限状态、基于规则的控制策略。在一条长的水平人行道上，受试者在56米和51米的距离上的平均速度分别为0.40 m/s和0.38 m/s; T6受试者在43米的距离上的平均速度为0.30 m/s。使用运动分析系统，步态模式的两个科目进行了比较，一个训练有素的，非受损的主题。SCI受试者在两个双支撑阶段（当拐杖和双脚接触地板时）花费的时间比未受损的受试者多，导致动量损失，因此步态较慢且效率较低。总之，FES辅助摆动通过步态被证明是一个潜在的有用的模式FES步态。
The swing-through gait is often the gait of choice for those crutch walkers who can perform it. However, a practical (sufficiently low energy and sufficiently fast) gait is usually not achievable by paraplegic individuals with thoracic lesions. Functional electrical stimulation (FES) was used to assist three spinal cord injured (SCI) subjects with complete thoracic lesions at Tll, Tll and T6 to ambulate with a swing-through gait patten. Eight channels of surface stimulation were used to bilaterally stimulate knee extensors, knee flexors, hip extensors and hip flexors. The stimulation sequence was controlled by a computer that implemented a finite-state, rule-based control strategy according to sensor inputs. Over a long, level walkway, the subjects averaged 0.40 m/s and 0.38 m/s for distances of 56 m and 51 m; the T6 subject averaged 0.30 m/s for 43 m. Using a motion analysis system, the gait patterns of two of the subjects were compared to those of a trained, non-impaired subject. The SCI subjects spent more time in both double support phases (when both crutches and both feet contact the floor) than did the non-impaired subject, leading to a loss of momentum and hence a slower and less efficient gait. In conclusion, an FES assisted swing-through gait is shown to be a potentially useful mode of FES gait.