Long-term Effects of Exoskeleton Ankle Robot on Lower-limb Functionality and Gait Pattern of Chronic Stroke Patients.
Refereed conference paper presented and published in conference proceedings

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AbstractBackground and aims:

Recent developments of powered ankle-foot orthosis (AFO) opened up the possibilities of robotic assistance in paretic ankle joint. However, the need for tethered power supply and bulky designs prevented existing powered AFO from daily-wear application. We have engineered a lightweight (~0.5kg) and portable (standalone) exoskeleton Ankle Robot for providing foot clearance during swing phase. The aim of this study was to investigate the long-term effect of the Ankle Robot on lower-limb functionality and temporal-spatial gait parameters of stroke patients.


Fifteen chronic stroke patients who could walk independently participated in 20-session robotic gait training. They wore the Ankle Robot throughout each session. They walked on level ground for 2x10 minutes and climbed ascend/descend stairs for another 10 minutes. Clinical assessment of lower-limb functionality was performed before (Pre) and after (Post) the 20-session gait training and after 3-month (Follow-Up). Nine of the subjects had the changes in temporal-spatial gait parameters recorded.


Clinical assessment results showed stroke patients had improvement in gait independency and voluntary control of lower-limb by Wilcoxon signed-rank test on FAC (Z=12.3, p=.002) and FMA-LE for volitional movement (Z=13.8, p=.001). They could walk longer distance in 6MWT (F=6.84, p=.004). Significant improvements were kept even after 3-month Follow-Up. Temporal spatial gait parameters showed no significant changes.


Long-term powered assistance in ankle dorsiflexion can promote lower-limb motor recovery. The synchronized proprioceptive feedback provided by the Ankle Robot might play a role in stimulating the brain plasticity.
All Author(s) ListYeung LF, Junata M, Ockenfeld C, Pang MKP, Wai HW, Soo OYY, Li SWL, Tong KY
Name of Conference11th International Society of Physical and Rehabilitation Medicine World Congress (ISPRM 2017)
Start Date of Conference30/04/2017
End Date of Conference04/05/2017
Place of ConferenceBuenos Aires
Country/Region of ConferenceArgentina
LanguagesEnglish-United States

Last updated on 2020-22-10 at 10:12