| Power spectral analysis of the neonatal primate electroencephalogram during acute hypoxemia. | |
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MedLine Citation:
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PMID: 7200226 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of acute graded hypoxemia on the electroencephalogram (EEG) of five prematures and five full term Macaca nemestrina in the neonatal period was determined using power spectral analysis--a technique that obviates the limitations of visual inspection. The EEG of selected epochs was analyzed by a Fast Fourier Transform program (POWER) during the 20 min of each trial of hypoxemia and compared with simultaneous arterial oxygen tensions. Levels of hypoxemia were graded as profound (PaO2=15-25 Torr); severe (PaO2=26-35 Torr), moderate (PaO2=36-50 Torr), or mild (PaO2=51-75 Torr). The EEG during normoxemia had a band width of 0.5 to 10 Hz and a peak power at 1-3 Hz. During mild hypoxemia, an increase in power in the delta range (0-3.5 Hz) occurred in the oldest animals. At moderate hypoxemia, the youngest animals showed a depression of absolute power in the delta band. A slowing of the EEG and decrease in power in the theta frequency range (4-8 Hz) followed when severe hypoxemic levels are reached. During profound hypoxemia, all animals at each postnatal age exhibited a significant decrease in EEG power at the delta and theta frequencies (P less than 0.025) except 3-wk-old full term animals in which there was no significant change in the delta band. These results clarify and extend previously reported effects of hypoxemia on the neonatal EEG. |
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Authors:
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R D Guthrie; T A Knauss; C M Haberkern; S M Sumi; D E Woodrum |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pediatric research Volume: 16 ISSN: 0031-3998 ISO Abbreviation: Pediatr. Res. Publication Date: 1982 Jan |
Date Detail:
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Created Date: 1982-06-14 Completed Date: 1982-06-14 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0100714 Medline TA: Pediatr Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 30-4 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Animals, Newborn / physiology* Anoxia / physiopathology* Brain / metabolism, pathology Electroencephalography* Female Fetal Hypoxia / physiopathology Macaca nemestrina Pregnancy |
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