Sunday, September 9, 2012

Can Computers Decode Your Thoughts ???


Yes its true that computers can decode our thoughts. University of California researchers have decoded electrical activity in the brain's temporal lobe - the seat of the auditory system - as a person listens to normal conversation. Based on the correlation between sound and brain activity, they were able to predict the words the person heard.

Researchers determined the location of intractable seizures in fifteen people undergoing brain surgery so that the area could be removed in a second surgery. Neurosurgeons cut a hole in the skull and placed the electrodes on the brain surface or cortex - in this case, up to 256 electrodes covering the temporal lobe - to record the activity over a period of a week to pinpoint the seizures. The brain activity detected by the electrodes as patients heard five-ten minutes of conversation was recorded. The data was used to reconstruct and playback the sounds the patients heard.

Two different computational models were tested to match spoken sounds to the pattern of activity in the electrodes. The patients ten heard a single word, and the models were used to predict the word based on electrode recordings.

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