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Báo cáo khoa hoc:" Applying a brain-computer interface to support motor imagery practice in people with stroke for upper limb recovery: a feasibility study"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Applying a brain-computer interface to support motor imagery practice in people with stroke for upper limb recovery: a feasibility study | Prasad et al. Journal of NeuroEngineering and Rehabilitation 2010 7 60 http www.jneuroengrehab.eom content 7 1 60 Hill JOURNAL OF NEUROENGINEERING NCR AND REHABILITATION RESEARCH Open Access Applying a brain-computer interface to support motor imagery practice in people with stroke for upper limb recovery a feasibility study Girijesh Prasad1 Pawel Herman1 Damien Coyle1 Suzanne McDonough2 Jacqueline Crosbie2 Abstract Background There is now sufficient evidence that using a rehabilitation protocol involving motor imagery MI practice in conjunction with physical practice PP of goal-directed rehabilitation tasks leads to enhanced functional recovery of paralyzed limbs among stroke sufferers. It is however difficult to confirm patient engagement during an MI in the absence of any on-line measure. Fortunately an EEG-based brain-computer interface BCI can provide an on-line measure of MI activity as a neurofeedback for the BCI user to help him her focus better on the MI task. However initial performance of novice BCI users may be quite moderate and may cause frustration. This paper reports a pilot study in which a BCI system is used to provide a computer game-based neurofeedback to stroke participants during the MI part of a protocol. Methods The participants included five chronic hemiplegic stroke sufferers. Participants received up to twelve 30-minute MI practice sessions in conjunction with PP sessions of the same duration on 2 days a week for 6 weeks. The BCI neurofeedback performance was evaluated based on the MI task classification accuracy CA rate. A set of outcome measures including action research arm test ARAT and grip strength GS was made use of in assessing the upper limb functional recovery. In addition since stroke sufferers often experience physical tiredness which may influence the protocol effectiveness their fatigue and mood levels were assessed regularly. Results Positive improvement in at least one of the outcome measures was observed in all the .