• Clin Neurophysiol · Apr 2006

    Case Reports

    Spectral and complexity features of the EEG changed by visual input in a case of subcortical stroke compared to healthy controls.

    • Márk Molnár, Roland Csuhaj, Szabolcs Horváth, Ildikó Vastagh, Zsófia Anna Gaál, Balázs Czigler, Andrea Bálint, Dóra Csikós, and Zoltán Nagy.
    • Department of Psychophysiology, Institute for Psychology, Hungarian Academy of Sciences, P.O. Box 398, H-1394 Budapest, Hungary. molnar@cogpsyphy.hu
    • Clin Neurophysiol. 2006 Apr 1; 117 (4): 771-80.

    ObjectiveTo compare spectral and complexity characteristics of the EEG in a unique case of subcortical infarct to those seen in healthy controls.MethodsAbsolute and relative frequency spectra, theta/beta ratio, the brain symmetry index (BSI), Omega-complexity and synchronization likelihood were calculated of the EEG recorded in eyes closed and eyes open conditions.ResultsIncreased absolute delta, theta, and Omega-complexity in these frequency bands, higher theta/beta ratios, and decreased relative beta activity were found in the side of the infarct. The BSI localized the excess of slow, and decrease of fast frequency activity to the area of ischemia. Following eyes opening the increase of fast and decrease of slow frequencies, the increase of Omega-complexity in the alpha and beta bands, and the decrease of synchronization likelihood for the fast frequency bands were reduced in the side of the infarct.ConclusionsThe subcortical infarct caused ipsilaterally increased slow, and decreased fast frequency activity accompanied by decreased synchronization of slow, increased synchronization of fast frequencies. Reduced reactivity in the ischemic side was particularly apparent for complexity measures.SignificanceComplexity indices of the EEG are sensitive complementary measures of electrophysiological changes caused by local lesions such as subcortical stroke.

      Pubmed     Full text   Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…