Author/Editor		Matjačić, Zlatko; Zadravec, Matjaž; Olenšek, Andrej
Title		Comparison of dynamic balancing responses following outward lateral perturbations during walking of healthy and post-stroke subjects
Type		članek
Vol. and No.		Letnik 3, št. 1
Publication year		2017
Volume		str. 11-14
ISSN		2364-5504 - Current directions in biomedical engineering
Language		eng
Abstract		Efficient dynamic balancing and movement co- ordination during walking are essential for stability. The objective of this preliminary study was to assess dynamic balancing responses in a selected post-stroke subject and to compare them with those assessed in neurologically intact individual. Balance Assessment Robot, a haptic robot that interfaces to a pelvis of a subject walking on an instrumented treadmill, was used to deliver perturbing pushes to the pelvis. We have assessed centre-of-pressure (CoP) and horizontal components of ground reaction forces (GRF) following outward pushes. The results have shown that depending on the amplitude of a perturbing push neurologically intact individual responded predominantly by ankle and hip strategies at lower amplitude of perturbation and ankle and stepping strategies at higher amplitude of perturbation. Post-stroke subject responded mainly by ankle and hip strategies when perturbed on the sound leg while the response when perturbed on the impaired leg was similar to the one observed in healthy subject. These preliminary results indicate that post-stroke subjects might be reluctant or not able to perform cross step with their impaired leg which is needed when counteracting outward perturbation.
Keywords		ankle strategy hip strategy pertubed walking stepping response motnje hoje ravnotežje koordinacija gibanja