Reduced sensory oscillatory activity during rapid auditory processing as a correlate of language-learning impairment.

Autor/inn/en	Heim, Sabine; Friedman, Jennifer Thomas; Keil, Andreas; Benasich, April A.
Titel	Reduced sensory oscillatory activity during rapid auditory processing as a correlate of language-learning impairment.
Quelle	In: Journal of neurolinguistics, 24 (2011) 5, S. [538]-555 PDF als Volltext Link als defekt meldenVerfügbarkeit
Sprache	englisch
Dokumenttyp	online; gedruckt; Zeitschriftenaufsatz
ISSN	0911-6044
DOI	10.1016/j.jneuroling.2010.09.006
Schlagwörter	Experimentelle Untersuchung; Entwicklungsstörung; Kognitiver Prozess; Sinneseindruck; Zeitschriftenaufsatz; Kind; Hören; Gehirn; Neurowissenschaften; Linguistik; Sprachentwicklung; Spracherkennung; Informationsverarbeitung; USA
Abstract	Successful language acquisition has been hypothesized to involve the ability to integrate rapidly presented, brief acoustic cues in sensory cortex. A body of work has suggested that this ability is compromised in language-learning impairment (LLI). The present research aimed to examine sensory integration during rapid auditory processing by means of electrophysiological measures of oscillatory brain activity using data from a larger longitudinal study. Twenty-nine children with LLI and control participants with typical language development (n = 18) listened to tone doublets presented at a temporal interval that is essential for accurate speech processing (70-ms interstimulus interval). The children performed a deviant (pitch change of second tone) detection task, or listened passively. The electroencephalogram was recorded from 64 electrodes. Data were source-projected to the auditory cortices and submitted to wavelet analysis, resulting in time-frequency representations of electrocortical activity. Results show significantly reduced amplitude and phase-locking of early (45 75 ms) oscillations in the gamma-band range (29 52 Hz), specifically in the LLI group, for the second stimulus of the tone doublet. This suggests altered temporal organization of sensory oscillatory activity in LLI when processing rapid sequences. (DIPF/Autor).
Erfasst von	DIPF \| Leibniz-Institut für Bildungsforschung und Bildungsinformation, Frankfurt am Main
Update	2012/1