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In the study, the researchers placed electrodes on the scalps of 27 participants, who were not lucid dreamers, to stimulate the frontal cortex, and recreate the gamma wave activity that has been seen in lucid dreamers.
The results showed that when the inexperienced dreamers were zapped with a current of 40 Hertz, 77 percent of the time these participants reported having what were described as lucid dreams.
Scientists have previously proposed that gamma waves are related to widespread synchronization of brain activity and an important aspect of consciousness. The new findings add to the evidence that gamma activity is related to consciousness, and make it more likely that such activity is actually causing consciousness, Voss said.