Forced Use of the Paretic Leg Induced by a Constraint Force Applied to the Nonparetic Leg in Individuals Poststroke During Walking.
Forced Use of the Paretic Leg Induced by a Constraint Force Applied to the Nonparetic Leg in Individuals Poststroke During Walking.
复制标题
DOI：
10.1177/1545968317740972
复制
发表时间：
2017-12
影响因子：
4.2
通讯作者：
Wu M
中科院分区：
文献类型：
--
作者：
Hsu CJ;Kim J;Roth EJ;Rymer WZ;Wu M
中风患者通常表现为瘫痪腿的肌肉活动减少，行走时步态不对称。确定对非麻痹腿施加阻力是否会增强麻痹腿的肌肉活动，并改善中风后轻偏瘫患者时空步态参数的对称性。15名慢性卒中后轻偏瘫患者参加了这项研究。当受试者在跑步机上行走时，使用定制的电缆驱动机器人系统将受控阻力施加到非麻痹腿。受试者完成了2个测试部分，在不同的步态阶段（即，早期和晚期摆动阶段）和不同的幅度（非麻痹腿髋屈肌最大自主收缩[MVC]的10%、20%和30%）施加阻力。收集麻痹腿肌肉的肌电图（EMG）活动和时空步态参数。与基线相比，当在非麻痹腿的早期摆动阶段施加阻力时，观察到麻痹腿的内侧腓肠肌、内侧腘绳肌、股内侧肌和胫骨前肌的综合EMG显著增加。此外，30%MVC的阻力比10%或20%MVC的阻力诱导的肌肉活动水平最高。步态参数的对称性指数也随着在早期摆动阶段施加的阻力而改善。在早期摆动阶段对非轻瘫腿施加受控的阻力可能会导致对轻瘫腿的强制使用，并改善中风后轻偏瘫患者步态的时空对称性。
Individuals with stroke usually show reduced muscle activities of the paretic leg and asymmetrical gait pattern during walking. To determine whether applying a resistance force to the nonparetic leg would enhance the muscle activities of the paretic leg and improve the symmetry of spatiotemporal gait parameters in individuals with poststroke hemiparesis. Fifteen individuals with chronic poststroke hemiparesis participated in this study. A controlled resistance force was applied to the nonparetic leg using a customized cable-driven robotic system while subjects walked on a treadmill. Subjects completed 2 test sections with the resistance force applied at different phases of gait (ie, early and late swing phases) and different magnitudes (10%, 20%, and 30% of maximum voluntary contraction [MVC] of nonparetic leg hip flexors). Electromyographic (EMG) activity of the muscles of the paretic leg and spatiotemporal gait parameters were collected. Significant increases in integrated EMG of medial gastrocnemius, medial hamstrings, vastus medialis, and tibialis anterior of the paretic leg were observed when the resistance was applied during the early swing phase of the nonparetic leg, compared with baseline. Additionally, resistance with 30% of MVC induced the greatest level of muscle activity than that with 10% or 20% of MVC. The symmetry index of gait parameters also improved with resistance applied during the early swing phase. Applying a controlled resistance force to the nonparetic leg during early swing phase may induce forced use on the paretic leg and improve the spatiotemporal symmetry of gait in individuals with poststroke hemiparesis.
登录
查看更多内容
DOI：
10.1016/s0003-9993(95)80038-7
发表时间：
1995-01-01
影响因子：
4.3
作者：
JORGENSEN, HS;NAKAYAMA, H;OLSEN, TS
通讯作者：
OLSEN, TS
影响因子：
2.4
作者：
Patterson, Kara K.;Gage, William H.;McIlroy, William E.
通讯作者：
McIlroy, William E.
影响因子：
2.9
作者：
DUYSENS, J;PEARSON, KG
通讯作者：
PEARSON, KG
DOI：
10.1016/s0003-9993(03)00030-3
发表时间：
2003-08-01
影响因子：
4.3
作者：
Hsu, AL;Tang, PF;Jan, MH
通讯作者：
Jan, MH
影响因子：
2.5
作者：
PEARSON, KG;COLLINS, DF
通讯作者：
COLLINS, DF