Word: electroencephalograms
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...volunteers were outfitted with electrode caps - akin to a white shower cap with a jungle of wires sticking out of it - that tracked their brain waves in order to determine their stage of slumber. Using an electroencephalogram (EEG), investigators monitored the sleepers' brain activity, and just when the squiggly lines on the screen showed that participants had entered deep sleep, researchers began playing a series of 25 of the sounds that the individual had heard earlier in the memory game. "[The volume] was a little over a whisper, probably much [quieter] than ... your iPod," says John Rudoy...
...Both toys employ EEG, or electroencephalogram, technology. EEGs measure electrical activity in the brain and have been used to diagnose seizures, assess head injuries and explore sleep disorders, among other functions. In other words, the science behind these toys is legit; there's no magic trick involved. "The fact that you can use EEG, that you can modulate it, that you can control it - it's well known, it's true," says Dr. Ronald Emerson, a neurology professor at Columbia University. Upon hearing about the new toys, his colleague Dr. Catherine Schevon said, "Our fellows would go ape for this...
...know that when a person's heart stops, the decline in brain function caused by a cut in blood supply is steep. Simultaneous recording of heart rate and brain output shows that within 11 to 20 secs. of the heart failing, the brain waves go flat. A flat electroencephalogram (EEG) recording doesn't suggest mere impairment. It points to the brain having shut down. Longtime NDE researcher Pim van Lommel, a retired Dutch cardiologist, has likened the brain in this state to a "computer with its power source unplugged and its circuits detached. It couldn't hallucinate. It couldn...
...been no year more momentous than 1953. Until then, scientists had equated sleep with flicking off a desk lamp. For more than two decades they'd been able to record brain activity in sleep, but the feeling was, why bother? Why waste reams of costly graph paper making electroencephalogram recordings of what was thought to be a neurological desert? With no strong expectation of finding otherwise, University of Chicago researchers Eugene Aserinski and Nathaniel Kleitman decided it was worth doing, monitoring 10 subjects in a laboratory. Their findings turned our understanding of the sleeping brain upside down...
Blood flow isn't the only way your mind can blow your cover; electrical activity can too. Your brain emits signals called event-related potentials (ERPs) that can be tracked with a high-density electroencephalogram (EEG) machine and 128 sensors attached to the face and scalp. Telling the truth and then a lie can take from 40 to 60 milliseconds longer than telling two truths in a row, because the brain must shift its data-assembly strategies. In theory, if a subject truthfully answers a question related to intention (say, "Are you traveling to Miami?") and then answers a more...