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Alpha Frequency Est...
Alpha Frequency Estimation in Patients With Epilepsy
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Larsson, Pål G. (författare)
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- Eeg-Olofsson, Orvar, 1932- (författare)
- Uppsala universitet,Institutionen för kvinnors och barns hälsa,Barnneurologisk forskning/Ahlsten
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Lantz, Göran (författare)
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(creator_code:org_t)
- 2012-03-22
- 2012
- Engelska.
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Ingår i: Clinical EEG and Neuroscience. - : SAGE Publications. - 1550-0594 .- 2169-5202. ; 43:2, s. 97-104
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report comparison and assessment of the clinical utility of different automated methods for the estimation of the alpha frequency in electroencephalograph (EEG) and compare them with visual evaluation. A total of 56 consecutive patients, aged 17 to 78 years, who had a routine EEG recording, were included, and they were grouped as patients with epilepsy (Ep) and without epilepsy (nEp). Five different methods were used for alpha frequency estimation: visually guided manual counting and visually guided Fourier transform, and 3 methods were fully automated: time domain estimation of alpha (automatic assessment of alpha waves in time domain [ATD]) and 2 fast Fourier transform (FFT)-based methods, a segmented (automatic assessment of EEG segments by FFT) and one full FFT (automatic assessment of whole EEG by one FFT of the full recording [AWF]). The AWF discriminated significantly between Ep and nEp. Visually guided manual counting showed an almost significant difference independently in the 2 occipital electrodes. The ATD underestimated high frequencies and returned a too low mean frequency. This study shows that AWF is the best suited method for automatic assessment of the alpha frequency.
Nyckelord
- alpha rhythm
- anticonvulsants
- antiepileptic drugs
- electroencephalography
- epilepsy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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