@article{ref1,
title="EEG changes measured by spectrum analysis under hyperbaric conditions",
journal="Aviation, space, and environmental medicine",
year="1990",
author="Dolmierski, R. and Maslowski, J. and Matousek, M. and Petersen, I.",
volume="61",
number="1",
pages="33-37",
abstract="The EEG activity was followed during simulated diving to 20 m depth. Altogether 49 EEG records of 5 min length were taken in 5 divers breathing compressed air in a close system. No significant changes of the EEG could be found during either compression or decompression if only conventional indicators, such as the amplitude of theta activity, were tested. However, a complex &quot;normality ratio,&quot; based on multivariate analysis of a normal material, was capable of showing significant impairment of the brain activity during the decompression. The indicator has been designed to reflect the abnormality level rather than the short-lasting EEG changes, the latter being mostly dependent on the alertness fluctuations. The EEG changes associated with alertness fluctuations were assessed separately by means of a specific &quot;alertness indicator&quot; and a prominent alertness increase was found during both compression and decompression phases of the diving experiment.<p /><p>Language: en</p>",
language="en",
issn="0095-6562",
doi="",
url="http://dx.doi.org/"
}