Dynamic task-specific brain network connectivity in children with severe reading difficulties

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dc.contributor.authorVourkas, Michael
dc.contributor.authorMicheloyannis, Sifis
dc.contributor.authorSimos, Panagiotis G.
dc.contributor.authorRezaie, Roozbeh
dc.contributor.authorFletcher, Jack M.
dc.contributor.authorCirino, Paul T.
dc.contributor.authorPapanicolaou, Andrew C.
dc.date.accessioned2018-02-19T22:25:33Z
dc.date.available2018-02-19T22:25:33Z
dc.date.issued2011-01
dc.description.abstractWe investigated patterns of sensor-level functional connectivity derived from single-trial whole-head magnetoencephalography data during a pseudoword reading and a letter-sound naming task in children with reading difficulties (RD) and children with no reading impairments (NI). The Phase Lag Index (PLI), a linear and nonlinear estimator, computed for each pair of sensors, was used to construct graphs and obtain estimates of local and global network efficiency according to graph theory. In the 8–13 Hz (alpha band) and 20–30 Hz (gamma band) range, RD students showed significantly lower global efficiency than NI children, for the entire MEG recording epoch. RD students also displayed reduced local network efficiency in the alpha band. Correlations between phonological decoding ability and graph metrics were particularly evident during the task that posed significant demands for phonological decoding, and followed distinct time courses depending on signal frequency. Results are consistent with the notion of task-dependent, aberrant long- and short-range functional connectivity in RD children.
dc.identifier10.1016/j.neulet.2010.11.013
dc.identifier.citationCopyright 2011 Neuroscience Letters. This is a post-print version of a published paper that is available at: https://www.sciencedirect.com/science/article/pii/S0304394010014552. Recommended citation: Vourkas, Michael, Sifis Micheloyannis, Panagiotis G. Simos, Roozbeh Rezaie, Jack M. Fletcher, Paul T. Cirino, and Andrew C. Papanicolaou. "Dynamic Task-Specific Brain Network Connectivity in Children with Severe Reading Difficulties." Neuroscience Letters 488, no. 2 (2011): 123-128. doi: 10.1016/j.neulet.2010.11.013. This item has been deposited in accordance with publisher copyright and licensing terms and with the author's permission.
dc.identifier.urihttp://hdl.handle.net/10657/2251
dc.language.isoen_US
dc.publisherNeuroscience Letters
dc.subjectPhonological decoding
dc.subjectDyslexia
dc.subjectMagnetoencephalography
dc.subjectConnectivity
dc.subjectGraph theory
dc.subjectSmall-world networks
dc.titleDynamic task-specific brain network connectivity in children with severe reading difficulties
dc.typeArticle

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