title: Focal cortical myoclonus in rolandic cortical dysplasia presenting as hemifacial twitching.
abstract: A 2-year-old girl presented with brief episodes of left hemifacial twitching. On ictal electroencephalography, repetitive focal spike discharges appeared at the right fronto-centro-temporal regions; these discharges preceded the onset of each twitch by 12 ms. Magnetic resonance imaging showed a linear abnormal signal intensity in the subcortical white matter at the right postcentral gyrus, where a cluster of dipole sources was detected by magnetoencephalography. These findings suggested that the patient had focal cortical myoclonus due to rolandic focal cortical dysplasia.
authors.affiliation: Department of Child Neurology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
authors.forename: Ryoko
authors.initials: R
authors.lastname: Honda
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Saito
authors.forename: Eiji
authors.initials: E
authors.lastname: Nakagawa
authors.forename: Kenji
authors.initials: K
authors.lastname: Sugai
authors.forename: Sayuri
authors.initials: S
authors.lastname: Sukigara
authors.forename: Masayuki
authors.initials: M
authors.lastname: Sasaki
authors.forename: Yuu
authors.initials: Y
authors.lastname: Kaneko
authors.forename: Atsuko
authors.initials: A
authors.lastname: Gunji
authors.forename: Kazunori
authors.initials: K
authors.lastname: Suzuki
mesh_terms: D002675:Child, Preschool; D004569:Electroencephalography / Q000379:methods*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D015225:Magnetoencephalography / Q000379:methods; D054220:Malformations of Cortical Development / Q000175:diagnosis / Q000473:pathology* / Q000503:physiopathology; D009207:Myoclonus / Q000175:diagnosis* / Q000503:physiopathology