biostudies-literatureUnknown12Shibata TJapan Science and Technology Agency<b>Background and Purpose:</b> We recently noted a gradual change in the boundary electroencephalography (EEG) oscillation of 7.8 Hz between theta (θ) and alpha (α) bands in response to increased atherosclerosis levels in the elderly. The aim of this study was to investigate the role of boundary EEG oscillations of θ-α bands on cognitive functions in vascular cognitive impairments (VCI) patients. <b>Materials and Methods:</b> We examined 55 patients with VCI in carotid stenosis, and underwent EEG in a resting state with closed eyes for 5 min. The asymmetry index (AI) along homologous channel pairs (e.g., F7-8) was assessed using neuronal activity topography (NAT). AI referring to 10 frequency components ranging from 4 to 20 Hz and neuropsychological assessments including linguistic competeFrontiers in human neuroscience170https://www.ebi.ac.uk/biostudies/studies/S-EPMC5954089biostudies-literatureBoundary EEG Asymmetry Is Associated to Linguistic Competence in Vascular Cognitive Impairments.PMC5954089Horie YKuroda SShibata TMusha TMatsuzaki HKobayashi YKosugi YKubo MTanaka MfalseBoundary EEG Asymmetry Is Associated to Linguistic Competence in Vascular Cognitive Impairments.<b>Background and Purpose:</b> We recently noted a gradual change in the boundary electroencephalography (EEG) oscillation of 7.8 Hz between theta (θ) and alpha (α) bands in response to increased atherosclerosis levels in the elderly. The aim of this study was to investigate the role of boundary EEG oscillations of θ-α bands on cognitive functions in vascular cognitive impairments (VCI) patients. <b>Materials and Methods:</b> We examined 55 patients with VCI in carotid stenosis, and underwent EEG in a resting state with closed eyes for 5 min. The asymmetry index (AI) along homologous channel pairs (e.g., F7-8) was assessed using neuronal activity topography (NAT). AI referring to 10 frequency components ranging from 4 to 20 Hz and neuropsychological assessments including linguistic compete2018-01-01T00:00:00Z20182025-04-21T22:25:15.058Z2019-03-26T23:40:29ZS-EPMC59540892986740410.3389/fnhum.2018.00170