6533b824fe1ef96bd1281461
RESEARCH PRODUCT
Left hemisphere enhancement of auditory activation in language impaired children
Tiina ParviainenTiina ParviainenSam Van BijnenSalme KärkkäinenPäivi Heleniussubject
0301 basic medicineMaleneurofysiologialcsh:MedicineSpecific language impairmentAudiologyBrain mapping3124 Neurology and psychiatryActivation pattern0302 clinical medicinesensory processinglcsh:Science10. No inequalityChildspecific language impartmentpathophysiologyBrain MappingMultidisciplinarymedicine.diagnostic_testBrainkuuloLanguage developmentAuditory PerceptionEvoked Potentials AuditorySensory processingFemalePsychologyAuditory perceptionauditory responsemedicine.medical_specialtyauditory evoked potentialModels Neurologicaldevelopmental language disorderNeurophysiologyLateralization of brain functionArticle03 medical and health sciencesmedicineHumansLanguage Development Disordershumankielellinen erityisvaikeuslcsh:RMagnetoencephalographybiological modelmedicine.diseaseDevelopmental disorder030104 developmental biologyhearinglcsh:Q030217 neurology & neurosurgerydescription
| openaire: EC/H2020/641652/EU//ChildBrain Specific language impairment (SLI) is a developmental disorder linked to deficient auditory processing. In this magnetoencephalography (MEG) study we investigated a specific prolonged auditory response (N250m) that has been reported predominantly in children and is associated with level of language skills. We recorded auditory responses evoked by sine-wave tones presented alternately to the right and left ear of 9–10-year-old children with SLI (n = 10) and children with typical language development (n = 10). Source analysis was used to isolate the N250m response in the left and right hemisphere. In children with language impairment left-hemisphere N250m responses were enhanced compared to those of controls, while no group difference was found in the right hemisphere. Consequently, language impaired children lacked the typical right-ward asymmetry that was found in control children. Furthermore, left but not right hemisphere N250m responses correlated positively with performance on a phonological processing task in the SLI group exclusively, possibly signifying a compensatory mechanism for delayed maturation of language processing. These results suggest that enhanced left-hemisphere auditory activation reflects a core neurophysiological manifestation of developmental language disorders, and emphasize the relevance of this developmentally specific activation pattern for competent language development. Peer reviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-01 | Scientific Reports |