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Neurophysiological studies in BECTS often focus on centro\u2010temporal spikes, but these correlate poorly with morphology and cognitive impairments. To better understand the neural profile of BECTS, we studied background brain oscillations, thought to be integrally involved in neural network communication, in sensorimotor areas. We used independent component analysis of temporally correlated sources on magnetoencephalography recordings to assess sensorimotor resting\u2010state network activity in BECTS patients and typically developing controls. We also investigated the variability of oscillatory characteristics within focal primary motor cortex (M1), localized with a separate finger abduction task. We hypothesized that background oscillations would differ between patients and controls in the sensorimotor network but not elsewhere, especially in the beta band (13\u201330 Hz) because of its role in network communication and motor processing. The results support our hypothesis: in the sensorimotor network, patients had a greater variability in oscillatory amplitude compared to controls, whereas there was no difference in the visual network. Network measures did not correlate with age. The coefficient of variation of resting M1 peak frequency correlated negatively with age in the beta band only, and was greater than average for a number of patients. Our results point toward a \u201cdisorganized\u201d functional sensorimotor network in BECTS, supporting a neurodevelopmental delay in sensorimotor cortex. Our findings further suggest that investigating the variability of oscillatory peak frequency may be a useful tool to investigate deficits of disorganization in neurodevelopmental disorders.<jats:italic>Hum Brain Mapp 36:3935\u20133949, 2015<\/jats:italic>. \u00a9<jats:bold>2015 Wiley Periodicals, Inc.<\/jats:bold><\/jats:p>","DOI":"10.1002\/hbm.22888","type":"journal-article","created":{"date-parts":[[2015,7,14]],"date-time":"2015-07-14T13:27:43Z","timestamp":1436880463000},"page":"3935-3949","source":"Crossref","is-referenced-by-count":33,"title":["Resting\u2010state oscillatory dynamics in sensorimotor cortex in benign epilepsy with centro\u2010temporal spikes and typical brain development"],"prefix":"10.1002","volume":"36","author":[{"given":"Loes","family":"Koelewijn","sequence":"first","affiliation":[{"name":"CUBRIC, School of Psychology Cardiff University Cardiff United 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