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EEG Biofeedback Background Report

EEG Biofeedback Background Report. Adrian Smith, gte198f Daniel Shinn, gte539f Ken Grove, gte262f ECE 4006 - Group N1 January 31, 2002. What is an EEG?. EEG stands for electroencephalogram EEG signals are created by measuring the difference in electrical currents across neuron membranes

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EEG Biofeedback Background Report

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  1. EEG BiofeedbackBackground Report Adrian Smith, gte198f Daniel Shinn, gte539f Ken Grove, gte262f ECE 4006 - Group N1 January 31, 2002

  2. What is an EEG? • EEG stands for electroencephalogram • EEG signals are created by measuring the difference in electrical currents across neuron membranes • Electrodes attached to the body pick up these signals • The can be a few electrodes or many

  3. EEG signals • Many naturally occurring signals in the human body effect EEG signals • Frequency Analysis helps to separate the different signals

  4. Types of EEG signals • EEG signals have been classified into 4 categories: • Delta 0.3 to 4 Hz • Dreamless sleep • Theta 4 to 8 Hz • Associated with thoughts which produce dreams • Alpha 8 to 13 Hz • Result of unfocused thoughts • Beta above 13 Hz • Result of interactions with environment

  5. Electrode placement • Electrode placement can effect signals received

  6. Related Research • Creating a Brain Computer Interface (BCI) has been a goal for researchers since computers were first introduced • What is necessary: • Amplification • Filtering • Classification • Control

  7. Related Research (cont.) • Large programs researching BCI’s: • Wadsworth Center in Albany • Graz University of Technology in Austria • Problems facing the programs: • Data transfer rate • Efficiency • Differences between test subjects • Learning curve for new users

  8. Previous Groups • Produced an amplifier that can output a strong enough signal to process • Created a foundation for a test bed for new work

  9. Our Focus • To filter the output of the amplifier to narrow down the signal to the desired frequencies • Digitize the signal • Process the signals to distinguish between them • Interpret signals as commands for controlling a remote control vehicle • Output control commands to remote control vehicle

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