Word: electroencephalograph
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
CONSCIOUSNESS IN THE BRAIN CAN BE TRACKED NOT JUST IN SPACE but also in time. Neuroscientists have long known that consciousness depends on certain frequencies of oscillation in the electroencephalograph (EEG). These brain waves consist of loops of activation between the cortex (the wrinkled surface of the brain) and the thalamus (the cluster of hubs at the center that serve as input-output relay stations). Large, slow, regular waves signal a coma, anesthesia or a dreamless sleep; smaller, faster, spikier ones correspond to being awake and alert. These waves are not like the useless hum from a noisy appliance...
...winner, Janine Antoni, once attachedherself to an electroencephalograph and spent thenight sleeping in a loom. She later used the loomto weave a blanket featuring the brain wavepatterns from her dreams...
...spokesman for the medical center said yesterday the electroencephalograph (EEG) tests, which measure electrical activity in the brain, would be repeated this week, and all life support procedures would be continued...
...interrupt a device that is performing lifesaving functions." The experts agreed that despite the seriousness of Karen's condition, she meets none of the accepted criteria for determining death. She has not suffered "brain death," the legal measure of death in eight states-though not New Jersey. An electroencephalograph shows that there is still brain activity. She has, on occasion, breathed spontaneously, for up to half an hour, though most experts doubt that she could do so much longer without the aid of the respirator...
...Association adopted a similar standard. As a guide to determining brain death, many doctors-and the Kansas and Maryland state legislatures-have adopted a set of standards suggested in 1968 by researchers at Harvard University. These require, among other things, that doctors wait at least 24 hours after an electroencephalograph (EEG) has shown no brain activity, then check again. If the second EEG is as flat as the first, the doctor can then assume that even if machines are keeping the patient breathing, his brain, and thus the patient, has died...