Brain Waves

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Brain Waves
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Brain Fingerprinting

• Forensic Science, Biometrics, etc

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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.

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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.

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• 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 analoggtdigital
• Commercially available to run on PCs and Macs,
  you can even use it qualitatively if youre bad
  at math

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Other Non-Invasive Brain Mapping Techniques

• Positron emission tomography
• event-related potentials
• electro-and magnetoencephalography,
• magnetic resonance imaging
• single-photon emission tomography
• boring