Similarity analysis of functional connectivity with functional near-infrared spectroscopy

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dc.WoS.categoriesBiochemical Research Methods; Optics; Radiology, Nuclear Medicine & Medical Imagingen_US
dc.authorid0000-0002-1773-0857en_US
dc.contributor.authorAkın, Ata
dc.contributor.authorDalmış, Mehmet Ufuk
dc.date.accessioned2020-12-23T06:59:58Z
dc.date.available2020-12-23T06:59:58Z
dc.date.issued2015-08
dc.description.abstractOne of the remaining challenges in functional connectivity (FC) studies is investigation of the temporal variability of FC networks. Recent studies focusing on the dynamic FC mostly use functional magnetic resonance imaging as an imaging tool to investigate the temporal variability of FC. We attempted to quantify this variability via analyzing the functional near-infrared spectroscopy (fNIRS) signals, which were recorded from the prefrontal cortex (PFC) of 12 healthy subjects during a Stroop test. Mutual information was used as a metric to determine functional connectivity between PFC regions. Two-dimensional correlation based similarity measure was used as a method to analyze within-subject and intersubject consistency of FC maps and how they change in time. We found that within-subject consistency (0.61 +/- 0.09) is higher than intersubject consistency (0.28 +/- 0.13). Within-subject consistency was not found to be task-specific. Results also revealed that there is a gradual change in FC patterns during a Stroop session for congruent and neutral conditions, where there is no such trend in the presence of an interference effect. In conclusion, we have demonstrated the between-subject, within-subject, and temporal variability of FC and the feasibility of using fNIRS for studying dynamic FC. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1117/1.JBO.20.8.086012
dc.identifier.issn1560-2281
dc.identifier.issn1083-3668
dc.identifier.pmid26296233en_US
dc.identifier.scopus2-s2.0-84940378821en_US
dc.identifier.urihttps://hdl.handle.net/11411/2960
dc.identifier.urihttps://doi.org/10.1117/1.JBO.20.8.086012
dc.identifier.wosWOS:000362516700023en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.issue8en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors2en_US
dc.publisherSpie-Soc Photo-Optical Instrumentation Engineersen_US
dc.relation.ispartofJournal Of Biomedical Opticsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectfunctional near-infrared spectroscopyen_US
dc.subjectfunctional connectivityen_US
dc.subjectconsistency of connectivity networksen_US
dc.subjectStroop tasken_US
dc.titleSimilarity analysis of functional connectivity with functional near-infrared spectroscopy
dc.typeArticle
dc.volume20en_US

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