Power spectral density and coherence analysis of eye disease with and without visual hallucination

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dc.authorid0000-0003-1980-700X
dc.authorid0000-0002-9704-6173
dc.authorid0000-0001-5335-3860
dc.authorid0000-0003-4292-5717
dc.contributor.authorYıldız, Sultan
dc.contributor.authorYuluğ, Burak
dc.contributor.authorKocabora, Mehmet Selim
dc.contributor.authorHanoğlu, Lütfü
dc.date.accessioned2021-01-14T07:56:44Z
dc.date.available2021-01-14T07:56:44Z
dc.date.issued2021
dc.departmentİstanbul Medipol Üniversitesi, Rektörlük, Rejeneratif ve Restoratif Tıp Araştırmaları Merkezi (REMER)
dc.departmentİstanbul Medipol Üniversitesi, Tıp Fakültesi, Cerrahi Tıp Bilimleri Bölümü, Göz Hastalıkları Ana Bilim Dalı
dc.departmentİstanbul Medipol Üniversitesi, Tıp Fakültesi, Dahili Tıp Bilimleri Bölümü, Nöroloji Ana Bilim Dalı
dc.description.abstractObjectives: Charles Bonnet Syndrome (CBS) is a rare clinical condition which has been defined as complex visual hallucinations (CVH) due to visual loss. This study investigated differences in the EEG power spectral density (PSD) and magnitude-squared coherences between patients with eye disease and hallucinations (VH+), and the control subjects with eye disease without hallucinations (VH-). Methods: 19 scalp channels EEG was recorded in four VH+ (CBS) and four VH- subjects during an eyes-closed resting condition. Artefact-free epochs were analyzed to obtain PSD values in the delta, theta, alpha1, alpha2, beta1, beta2 and gamma frequency bands. Coherence values were calculated through inter-hemispheric and intra-hemispheric electrodes pairs of interest. All subjects were performed with neuropsychological and behavioral assessments to evaluate cognitive functions. Results: The VH + group had increase PSD in theta, beta2 and gamma bands in central, parietal and occipital (O2) areas. The synchronicity was altered particularly in parietal and frontal-parietal regions especially at theta and alpha1 respectively. Conclusions: The aberrant activity in occipital and parietal regions suggest the mechanism of CBS. This is a major electrophysiological study of understanding CBS and visual hallucinations.
dc.identifier.citationYıldız, S., Yuluğ, B., Kocabora, M. S. ve Hanoğlu, L. (2021). Power spectral density and coherence analysis of eye disease with and without visual hallucination. Neuroscience Letters, 740. https://dx.doi.org/10.1016/j.neulet.2020.135444
dc.identifier.doi10.1016/j.neulet.2020.135444
dc.identifier.issn0304-3940
dc.identifier.issn1872-7972
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://dx.doi.org/10.1016/j.neulet.2020.135444
dc.identifier.urihttps://hdl.handle.net/20.500.12511/6241
dc.identifier.volume740
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier Ireland Ltd
dc.relation.ispartofNeuroscience Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.subjectVisual Hallucinations
dc.subjectCharles Bonnet Syndrome
dc.subjectEEG
dc.titlePower spectral density and coherence analysis of eye disease with and without visual hallucination
dc.typeArticle

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