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Could Scientists Peek Into Your Dreams?
Date:4/4/2013

By Barbara Bronson Gray
HealthDay Reporter

THURSDAY, April 4 (HealthDay News) -- Talk about mind reading. Researchers have discovered a potential way to decode your dreams, predicting the content of the visual imagery you've experienced on the basis of neural activity recorded during sleep.

Visual experiences you have when dreaming are detectable by the same type of brain activity that occurs when looking at actual images when you're awake, the small new study suggests.

The scientists created decoding computer programs based on brain activity measured while wide-awake study participants looked at certain images. Then, right after being awakened from the early stages of sleep, the researchers asked the subjects to describe the dream they were having before being disturbed.

The researchers used functional MRI to monitor brain activity of the participants and polysomnography to record the physical changes that occur during sleep. They compared evidence of brain activity when participants were awake and looking at real images to the brain activity they saw when participants were dreaming, when they were in light -- or early -- sleep. Functional MRIs directly measure blood flow in the brain, providing information on brain activity.

Published April 4 in the journal Science, the study shows it may be possible to use brain activity patterns to understand something about what a person is dreaming about, according to Yukiyasu Kamitani, lead author and head of neuroinformatics at ATR Computational Neuroscience Laboratories, in Kyoto, Japan.

"Our current approach requires the data of image viewing and sleep within the same [person]," Kamitani said. "But there are methods being developed for aligning brain patterns across people. It may become possible to build a decoder that works for different people with a small amount of data for calibration."

While the research may conjure up images of
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