title: Atypical hemispheric asymmetries for the processing of phonological features in children with rolandic epilepsy.
abstract: We assessed language lateralization in 177 healthy 4- to 11-year-old children and adults and atypical asymmetries associated with unilateral epileptic foci in 18 children with benign epilepsy with centrotemporal spikes (BECTS). Dichotic listening results revealed two indices of immature functional asymmetry when the focus was left-sided (BECTS-L). First, children with BECTS-L did not show left hemisphere dominance for the processing of place of articulation, which was recorded in children with BECTS-R and control children. On the contrary, healthy children exhibited a gradual increase in left hemisphere dominance for place processing during childhood, which is consistent with the shift from global to finer-grained acoustic analysis predicted by the Developmental Weighting Shift model. Second, children with BECTS-L showed atypical left hemisphere involvement in the processing of the voiced value (+V), associated with a long acoustic event in French stop consonants, whereas right hemisphere dominance increased with age for +V processing in healthy children. BECTS-L, therefore, interferes with the development of left hemisphere dominance for specific phonological mechanisms.
authors.affiliation: Laboratoire Dynamique du Langage, CNRS UMR 5596, Lyon, France. Nathalie.bedoin@univ-lyon2.fr
authors.forename: Nathalie
authors.initials: N
authors.lastname: Bedoin
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Ferragne
authors.forename: Céline
authors.initials: C
authors.lastname: Lopez
authors.forename: Vania
authors.initials: V
authors.lastname: Herbillon
authors.forename: J
authors.initials: J
authors.lastname: De Bellescize
authors.forename: Vincent
authors.initials: V
authors.lastname: des Portes
mesh_terms: D000161:Acoustic Stimulation; D000927:Anticonvulsants / Q000627:therapeutic use; D001184:Articulation Disorders / Q000209:etiology*; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography; D019305:Epilepsy, Rolandic / Q000150:complications* / Q000188:drug therapy; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010700:Phonetics; D014825:Vocabulary
chemical_list: D000927:Anticonvulsants