title: Mu rhythm suppression reflects mother-child face-to-face interactions: a pilot study with simultaneous MEG recording.
abstract: Spontaneous face-to-face interactions between mothers and their children play crucial roles in the development of social minds; however, these inter-brain dynamics are still unclear. In this pilot study, we measured MEG mu suppression during face-to-face spontaneous non-linguistic interactions between mothers and their children with autism spectrum disorder (ASD) using the MEG hyperscanning system (i.e., simultaneous recording). The results demonstrated significant correlations between the index of mu suppression (IMS) in the right precentral area and the traits (or severity) of ASD in 13 mothers and 8 children (MEG data from 5 of the children could not be obtained due to motion noise). In addition, higher IMS values (i.e., strong mu suppression) in mothers were associated with higher IMS values in their children. To evaluate the behavioral contingency between mothers and their children, we calculated cross correlations between the magnitude of the mother and child head-motion during MEG recordings. As a result, in mothers whose head motions tended to follow her child's head motion, the magnitudes of mu suppression in the mother's precentral area were large. Further studies with larger sample sizes, including typically developing children, are necessary to generalize this result to typical interactions between mothers and their children.
authors.affiliation: Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
authors.forename: Chiaki
authors.initials: C
authors.lastname: Hasegawa
authors.affiliation: Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan.|Department of Neurosurgery, Osaka University Medical School, Suita, 565-0871, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ikeda
authors.affiliation: Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Yoshimura
authors.affiliation: Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
authors.forename: Hirotoshi
authors.initials: H
authors.lastname: Hiraishi
authors.affiliation: Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.|Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8641, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8641, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Furutani
authors.affiliation: School of Radiological Technology, Gunma Prefectural College of Health Sciences, Maebashi, 371-0052, Japan.
authors.forename: Norio
authors.initials: N
authors.lastname: Hayashi
authors.affiliation: Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.|Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8641, Japan.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Minabe
authors.affiliation: Department of Neurosurgery, Osaka University Medical School, Suita, 565-0871, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Hirata
authors.affiliation: Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Asada
authors.affiliation: Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.|Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8641, Japan.
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Kikuchi
mesh_terms: D000328:Adult; D000067877:Autism Spectrum Disorder / Q000503:physiopathology*; D001519:Behavior; D058256:Brain Waves; D002648:Child; D002675:Child, Preschool; D005260:Female; D019416:Head Movements; D006801:Humans; D015225:Magnetoencephalography / Q000379:methods; D008297:Male; D009034:Mother-Child Relations; D009044:Motor Cortex / Q000502:physiology*