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Berkeley News Center: Scientists use brain imaging to reveal the movies in our mind


Larry

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BERKELEY — Imagine tapping into the mind of a coma patient, or watching one’s own dream on YouTube. With a cutting-edge blend of brain imaging and computer simulation, scientists at the University of California, Berkeley, are bringing these futuristic scenarios within reach.

Using functional Magnetic Resonance Imaging (fMRI) and computational models, UC Berkeley researchers have succeeded in decoding and reconstructing people’s dynamic visual experiences – in this case, watching Hollywood movie trailers.

They watched two separate sets of Hollywood movie trailers, while fMRI was used to measure blood flow through the visual cortex, the part of the brain that processes visual information. On the computer, the brain was divided into small, three-dimensional cubes known as volumetric pixels, or “voxels.”

“We built a model for each voxel that describes how shape and motion information in the movie is mapped into brain activity,” Nishimoto said.

The brain activity recorded while subjects viewed the first set of clips was fed into a computer program that learned, second by second, to associate visual patterns in the movie with the corresponding brain activity.

Brain activity evoked by the second set of clips was used to test the movie reconstruction algorithm. This was done by feeding 18 million seconds of random YouTube videos into the computer program so that it could predict the brain activity that each film clip would most likely evoke in each subject.

Finally, the 100 clips that the computer program decided were most similar to the clip that the subject had probably seen were merged to produce a blurry yet continuous reconstruction of the original movie.

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so.. this is what i envision

man in lab coat at party: "i bet you 20 bucks this machine i built can disply your dreams"

man in trench coat at party: "no way dude... but that would be soooo cool!"

man in lab coat at party: <<< turns on machine and displays 15 seconds of many porn clips jumled together>>>

man in trench coat at party: <<pays $20 and walks away>>>

man in lab coat at party: "i bet you 20 bucks this machine i built can disply your dreams"

.....

repeat N times.

man in lab coat at academic seminar: "...and so, with 95% confidence interval over an N sample I have demonstrated the ability to predict and project dreams of.... bla bla bla"

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Lemmie tell ya, I wish someone had recorded last night's dream because apparently I was some rich Bruce Wayne type hero guy, but I for whatever reason murdered someone and then their body along with another (not sure where the other came from) were tossed into a fountain in front of my house. Then I was standing in the driveway of my current house looking at my Nissan Altima wondering why there was smoke coming out from under the hood, that's when my wife woke me up and I had to let the dog out, only to find that it had literally eaten 3/4's of my son's soccer cleat...sole and all....

Took me a good 10 minutes to try and figure out what was dream and what wasn't....

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Lemmie tell ya, I wish someone had recorded last night's dream because apparently I was some rich Bruce Wayne type hero guy, but I for whatever reason murdered someone and then their body along with another (not sure where the other came from) were tossed into a fountain in front of my house. Then I was standing in the driveway of my current house looking at my Nissan Altima wondering why there was smoke coming out from under the hood, that's when my wife woke me up and I had to let the dog out, only to find that it had literally eaten 3/4's of my son's soccer cleat...sole and all....

Took me a good 10 minutes to try and figure out what was dream and what wasn't....

The dream was the part with you being successful and finding someone to marry you. :movefast:

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