Linked Life Data

3705252

Source:http://linkedlifedata.com/resource/pubmed/id/3705252

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1986-6-2
pubmed:abstractText
Divers show symptoms of a condition known as the high pressure nervous syndrome (HPNS) at depths greater than about 180 m. A symptom that possibly lends itself to an objective diagnosis is a change in the frequency content of the EEG signal with increased slow wave (theta, 4-8 Hz) and decreased fast wave (alpha, 8-13 Hz) activity. Therefore, a method was developed, first, to obtain the power in the EEG frequency bands by digital filtering and, second, to display band-indices and ratios during a dive, in a format suitable for rapid appraisal. The formulas for the cascaded 2nd order Butterworth bandpass filters are given together with the corresponding FORTRAN program. EEG signals from 3 subjects taped during the Duke University Atlantis IV dive to a depth of 650 m were analyzed and displayed by the above method as well as by a Fast Fourier Transfer signal analyzer. The results suggest the theta: alpha ratio, which is a one-parameter EEG evaluation in the frequency domain, is a valuable descriptor for the objective HPNS diagnosis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0093-5387
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
99-110
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Use of EEG digital filtering and display for HPNS diagnosis.
pubmed:publicationType
Journal Article