Tuesday, October 28, 2014

Voice of "God" Technology

Comparison  Response in Auditory and Visual BCI Paradigms /Brain Waves into Reconstructed Sound and Conversation-    Brian Pasley

As you listened to your colleagues' conversations at work today, or to a podcast on the train home, or to your personal trainer shouting lift, your brain completed some complex tasks. The frequencies of syllables and whole words were decoded and given meaning, and you could make sense of the language-filled world we live in without actively thinking about it. Now a team of researchers from the University of California at Berkeley has figured out how to map some of these cortical computations. It's a major step toward understanding how we hear and a  step toward hearing what we think.
If one  decodes patterns of activity in the brain,one may also play back the imagined conversations in our heads, or communicate with a person who can think and hear but cannot speak.

"We're looking at which brain sites become active. Because we can determine some association between those brain sites and different frequencies, we can watch what brain sites are turning on and off for these recordings, and that lets us map back to the sound," Brian Pasley, University of California ,Berkeley said
Since neurologists can know the frequencies of certain phonemes — specific language sounds — this cortical spectroscopy can decode which sounds, and then  which words, a person is hearing.
In December, Boston University researchers published research explaining how they stimulated patients' visual cortices and induced brain patterns to create a learned behavior, even when the subjects did not know what they were supposed to be learning. Last fall, Jack Gallant — also at UCB — published a paper describing the reconstruction of video images by tapping the visual cortices of people who watched the videos.

This form of mind-reading,  neurologists prefer to call "decoding,

Neuroscientists have long been trying to decode the inner workings of the brain, associating neurons in the sensory cortices with stimuli that fire up those neurons. But the newest research,  peers more deeply into the recesses of our minds, promising to illuminate thoughts so they can be seen and shared with others.

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