当前位置： SCI文献检索 > Journal of NeuroEngineering and Rehabilitation期刊下所有文献 > Changes in the activation and function of the ankle plantar flexor muscles due to gait retraining in chronic stroke survivors.

Changes in the activation and function of the ankle plantar flexor muscles due to gait retraining in chronic stroke survivors.

Abstract：

BACKGROUND:A common goal of persons post-stroke is to regain community ambulation. The plantar flexor muscles play an important role in propulsion generation and swing initiation as previous musculoskeletal simulations have shown. The purpose of this study was to demonstrate that simulation results quantifying changes in plantar flexor activation and function in individuals post-stroke were consistent with (1) the purpose of an intervention designed to enhance plantar flexor function and (2) expected muscle function during gait based on previous literature. METHODS:Three-dimensional, forward dynamic simulations were created to determine the changes in model activation and function of the paretic ankle plantar flexor muscles for eight patients post-stroke after a 12-weeks FastFES gait retraining program. RESULTS:An median increase of 0.07 (Range [-0.01,0.22]) was seen in simulated activation averaged across all plantar flexors during the double support phase of gait from pre- to post-intervention. A concurrent increase in walking speed and plantar flexor induced forward center of mass acceleration by the plantar flexors was seen post-intervention for seven of the eight subject simulations. Additionally, post-training, the plantar flexors had an simulated increase in contribution to knee flexion acceleration during double support. CONCLUSIONS:For the first time, muscle-actuated musculoskeletal models were used to simulate the effect of a gait retraining intervention on post-stroke muscle model predicted activation and function. The simulations showed a new pattern of simulated activation for the plantar flexor muscles after training, suggesting that the subjects activated these muscles with more appropriate timing following the intervention. Functionally, simulations calculated that the plantar flexors provided greater contribution to knee flexion acceleration after training, which is important for increasing swing phase knee flexion and foot clearance.

journal_name

J Neuroeng Rehabil

journal_title

Journal of neuroengineering and rehabilitation

authors

Knarr BA,Kesar TM,Reisman DS,Binder-Macleod SA,Higginson JS

doi

10.1186/1743-0003-10-12

subject

Has Abstract

pub_date

2013-01-31 00:00:00

pages

issn

1743-0003

pii

1743-0003-10-12

journal_volume

pub_type

杂志文章

在线工具

Changes in the activation and function of the ankle plantar flexor muscles due to gait retraining in chronic stroke survivors.