Title :
A real time frequency analysis methodology for evoked potential loop-closure
Author :
Schnurer, John H. ; Ingle, David F. ; Downey, Craig W. ; Junker, Andrew M.
Author_Institution :
Syst. Res. Labs., Dayton, OH, USA
Abstract :
Evoked EEG (electroencephalogram) response research indicates the potential for a usable brain-actuated control system (UBACS). Reduction of time lag is essential for the continued development of a subject-training system, which has yielded results, but has certain limitations in the areas of response time and false feedback due to artifacts. The authors are investigating a lock-in amplifier system (LAS) to overcome these limitations. Frequency and phase facile system capabilities as well as artifact rejection techniques for the LAS are considered. Improved LAS response time is projected. It is expected that this tool will enable effective training by continuously supplying subjects with an indication of their EEG output at a reference frequency. The experimental/prototype system is discussed
Keywords :
biocontrol; closed loop systems; electroencephalography; feedback; frequency-domain analysis; training; EEG; artifact rejection; biocontrol; brain-actuated control system; electroencephalogram; evoked potential loop-closure; false feedback; frequency facile system; lock-in amplifier system; phase facile system; real time frequency analysis; reference frequency; response; response time; subject-training system; time lag; Amplifiers; Assembly; Control systems; Data mining; Delay effects; Digital systems; Electroencephalography; Feedback loop; Frequency measurement; Human factors;
Conference_Titel :
Aerospace and Electronics Conference, 1988. NAECON 1988., Proceedings of the IEEE 1988 National
Conference_Location :
Dayton, OH
DOI :
10.1109/NAECON.1988.195211
