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Abnormalities in central auditory maturation in children with language-based learning problems
Phillip M Gilley1, Anu Sharma, Michael Dorman
1The University of Texas at Dallas, School of Behavioral and Brain Sciences, Callier Advanced Hearing Research Center, 1966 Inwood Rd., Dallas, TX 75206, USA. pgilley@utdallas.edu
Summary
Children with language-based learning problems (LP) often show abnormal central auditory pathway maturation. A novel stimulation method identified distinct categories of these auditory processing abnormalities.
Area of Science:
- Neuroscience
- Developmental Psychology
- Speech and Hearing Sciences
Background:
- Language-based learning problems (LP) are associated with difficulties in auditory processing.
- Maturation of central auditory pathways is crucial for language development and learning.
Purpose of the Study:
- To investigate the maturation of central auditory pathways in children diagnosed with language-based learning problems (LP).
- To identify specific patterns of auditory processing abnormalities in children with LP.
Main Methods:
- Cortical auditory evoked potentials (CAEPs) were recorded in 26 children with LP and 38 typical children.
- A speech sound (/uh/) was presented using a rate-sensitive stimulation paradigm with decreasing inter-stimulus intervals (ISIs).
Main Results:
- The majority of children with LP exhibited abnormal CAEP responses, categorized into three distinct patterns.
- Abnormalities included delayed P1 latencies, absent or delayed N1/P2 components, and low-amplitude responses.
- A subset of children with LP demonstrated normal CAEP responses.
Conclusions:
- Children with LP frequently display atypical patterns in the maturation of their central auditory pathways.
- The described rate-sensitive stimulation paradigm effectively identifies and categorizes these maturational abnormalities in children with LP.
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