Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: EEG-Based Asynchronous BCI Controls Functional Electrical Stimulation in a Tetraplegic Patient Gert Pfurtscheller | EURASIP Journal on Applied Signal Processing 2005 19 3152-3155 2005 Hindawi Publishing Corporation EEG-Based Asynchronous BCI Controls Functional Electrical Stimulation in a Tetraplegic Patient Gert Pfurtscheller Laboratory of Brain-Computer Interfaces Institute of Computer Graphics and Vision and Ludwig Boltzmann-Institute for Medical Informatics and Neuroinformatics Graz University of Technology Inffeldgasse 16a 8010 Graz Austria Email pfurtscheller@ Gernot R. Muller-Putz Laboratory of Brain-Computer Interfaces Institute of Computer Graphics and Vision Graz University of Technology Inffeldgasse 16a 8010 Graz Austria Email Jorg Pfurtscheller Department of Traumatology Hospital Villach Nikolaigasse 43 9400 Villach Austria Em ail Rudiger Rupp Department II Orthopedic Hospital of Heidelberg University Schlierbacher Landstrafe 200a 69118 Heidelberg Germany Em ail ruediger. rupp@ Received 29 January 2004 The present study reports on the use of an EEG-based asynchronous uncued user-driven brain-computer interface BCI for the control of functional electrical stimulation FES . By the application of FES noninvasive restoration of hand grasp function in a tetraplegic patient was achieved. The patient was able to induce bursts of beta oscillations by imagination of foot movement. These beta oscillations were recorded in a one EEG-channel configuration bandpass filtered and squared. When this beta activity exceeded a predefined threshold a trigger for the FES was generated. Whenever the trigger was detected a subsequent switching of a grasp sequence composed of 4 phases occurred. The patient was able to grasp a glass with the paralyzed hand completely on his own without additional help or other technical aids. Keywords and phrases beta oscillations motor imagery functional electrical stimulation brain-computer interface spinal cord injury neuroprosthesis. 1. INTRODUCTION The idea of direct brain .
