Electroencephalograph - EEG

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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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