Tim Brunson DCH

Welcome to The International Hypnosis Research Institute Web site. Our intention is to support and promote the further worldwide integration of comprehensive evidence-based research and clinical hypnotherapy with mainstream mental health, medicine, and coaching. We do so by disseminating, supporting, and conducting research, providing professional level education, advocating increased level of practitioner competency, and supporting the viability and success of clinical practitioners. Although currently over 80% of our membership is comprised of mental health practitioners, we fully recognize the role, support, involvement, and needs of those in the medical and coaching fields. This site is not intended as a source of medical or psychological advice. -- Tim Brunson, PhD

Autogenic EMG-controlled functional electrical stimulation for ankle dorsiflexion control.



Our objectives were to develop and test a new system for the potential for stable, real-time cancellation of residual stimulation artefacts (RSA) using surface electrode autogenic electromyography-controlled functional electrical stimulator (aEMGcFES). This type of closed-loop FES could be used to provide more natural, continuous control of lower extremity paretic muscles. We built upon work that has been done in the field of FES with one major technological innovation, an adaptive Gram-Schmidt filtering algorithm, which allowed us to digitally cancel RSA in real-time. This filtering algorithm resulted in a stable real-time estimation of the volitional intent of the stimulated muscle, which then acted as the direct signal for continuously controlling homonymous muscle stimulation. As a first step toward clinical application, we tested the viability of our aEMGcFES system to continuously control ankle dorsiflexion in a healthy subject. Our results indicate positively that an aEMGcFES device with adaptive filtering can respond proportionally to voluntary EMG and activate forceful movements to assist dorsiflexion during controlled isometric activation at the ankle. We also verified that normal ankle joint range of movement could be maintained while using the aEMGcFES system. We suggest that real-time cancellation of both primary and RSA is possible with surface electrode aEMGcFES in healthy subjects and shows promising potential for future clinical application to gait pathologies such as drop foot related to hemiparetic stroke.

Yeom H, Chang YH. J Neurosci Methods. 2010 Aug 14. Dept. of Medical Engineering, Eulji University, Sungnam, Gyeonggi, South Korea; School of Applied Physiology, Georgia Institute of Technology, Atlanta, GA, USA; Biomedical Engineering Program, Emory University/Georgia Institute of Technology, Atlanta, GA, USA.

TrackBacks
There are no trackbacks for this entry.

Trackback URL for this entry:
http://www.hypnosisresearchinstitute.org/trackback.cfm?0B7B4404-C09F-2A3B-F6DC8C8126EC70B4

Comments
© 2000 - 2019The International Hypnosis Research Institute, All Rights Reserved.

Contact