期刊
BIOLOGICAL PSYCHOLOGY
卷 67, 期 3, 页码 299-317出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.biopsycho.2004.02.002
关键词
reading; speech; auditory brainstem response; frequency following response
资金
- NIDCD NIH HHS [F31 DC04546-01, T32 DC00015-17, R01 DC01510-09] Funding Source: Medline
This study investigated how the human auditory brainstem represents constituent elements of speech sounds differently in children with language-based learning problems (LP n = 11) compared to normal children (NL, n = 9), especially under stress of rapid stimulation. Children were chosen for this study based on performance on measures of reading and spelling and measures of syllable discrimination. In response to the onset of the speech sound /da/, wave V-V-n, of the auditory brainstem response (ABR) had a significantly shallower slope in LP children, suggesting longer duration and/or smaller amplitude. The amplitude of the frequency following response (FFR) was diminished in LP subjects over the 229-686 Hz range, which corresponds to the first formant of the/da/ stimulus, while activity at 114 Hz, representing the fundamental frequency of /da/, was no different between groups. Normal indicators of auditory peripheral integrity suggest a central, neural origin of these differences. These data suggest that poor representation of crucial components of speech sounds could contribute to difficulties with higher-level language processes. (C) 2004 Elsevier B.V. All rights reserved.
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