Role of language-related functional connectivity in patients with benign childhood epilepsy with centrotemporal spikes

Hyeon Jin Kim, Jung Hwa Lee, Chang Hyun Park, Hye Sun Hong, Yun Seo Choi, Jeong Hyun Yoo, Hyang Woon Lee

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Background and Purpose Benign childhood epilepsy with centrotemporal spikes (BECTS) does not always have a benign cognitive outcome. We investigated the relationship between cognitive performance and altered functional connectivity (FC) in the resting-state brain networks of BECTS patients. Methods We studied 42 subjects, comprising 19 BECTS patients and 23 healthy controls. Cognitive performance was assessed using the Korean version of the Wechsler Intelligence Scale for Children-III, in addition to verbal and visuospatial memory tests and executive function tests. Resting-state functional magnetic resonance imaging was acquired in addition to high-resolution structural data. We selected Rolandic and language-related areas as regions of interest (ROIs) and analyzed the seed-based FC to voxels throughout the brain. We evaluated the correlations between the neuropsychological test scores and seed-based FC values using the same ROIs. Results The verbal intelligence quotient (VIQ) and full-scale intelligence quotient (FSIQ) were lower in BECTS patients than in healthy controls (p<0.001). The prevalence of subjects with a higher performance IQ than VIQ was significantly higher in BECTS patients than in healthy controls (73.7% vs. 26.1%, respectively; p=0.002). Both the Rolandic and language-related ROIs exhibited more enhanced FC to voxels in the left inferior temporal gyrus in BECTS patients than in healthy controls. A particularly interestingly finding was that the enhanced FC was correlated with lower cognitive performance as measured by the VIQ and the FSIQ in both patients and control subjects. Conclusions Our findings suggest that the FC alterations in resting-state brain networks related to the seizure onset zone and language processing areas could be related to adaptive plasticity for coping with cognitive dysfunction.

Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalJournal of Clinical Neurology (Korea)
Volume14
Issue number1
DOIs
StatePublished - Jan 2018

Keywords

  • Benign childhood epilepsy with centrotemporal spikes
  • Cognition
  • Functional connectivity
  • Functional magnetic resonance imaging
  • Intelligence quotient

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