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Brain Waves

Brain Waves. Brain Fingerprinting. Forensic Science, Biometrics, etc…. Brain-Computer Interface Research: A non-invasive example. J. Bayliss research group – Rochester Institute of Technology. Will this be us?

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Brain Waves

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  1. Brain Waves

  2. Brain Fingerprinting • Forensic Science, Biometrics, etc…

  3. Brain-Computer Interface Research: A non-invasive example • J. Bayliss research group – Rochester Institute of Technology. Will this be us? • Goal: “To develop a system that performs real-time EEG signal analysis in order to generate control commands for environmental control, communication, or even simple driving commands” • The Hope: “A big signal like the P300 can be recognized via single trial recognition in order to trigger commands on the VR car. We currently have around 85% average recognition accuracy.” • Success: “P300” signal response is evoked, trained via biofeedback, used to activate things in a virtual apartment.

  4. Electroencephalograph - EEG • Brain has continuous electrical activity that can be recorded • Pairs of electrodes attached to scalp form distinct channels • Weak signal ~millivolts is sent thru amplifier • Continuous output recorded via galvanometer.

  5. Each pair of electrodes forms a channel to measure something - maybe potential difference between them? • Localized anomalies pinpoint physical brain problems • Computer waveform analysis: high-speed samples taken 200 times/second to convert analog>digital • Commercially available to run on PCs and Macs, you can even use it qualitatively if you’re bad at math

  6. Other Non-Invasive Brain Mapping Techniques • Positron emission tomography • event-related potentials • electro-and magnetoencephalography, • magnetic resonance imaging • single-photon emission tomography • boring

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