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Published on: January 29, 2014
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The Relationship between Speech Sound Disorder and Cortical Auditory Evoked Potential
Tatiane Faria Barrozo1, Liliane Aparecida Fagundes Silva1, Carla Gentile Matas1
1Department of Physiotherapy, Audiology and Speech Therapy, and Occupational Therapy, University of São Paulo, São Paulo, Brazil.
Summary
Cortical auditory evoked potentials (CAEPs) in children with speech sound disorder (SSD) show age-related differences in latency, but not amplitude. Older children generally exhibit longer CAEP latencies, regardless of SSD severity.
Area of Science:
- Neuroscience
- Speech-Language Pathology
- Auditory Processing
Background:
- Speech sound disorder (SSD) involves difficulties in producing, perceiving, and phonologically representing speech sounds.
- Auditory perception is crucial for developing sound representations necessary for recognition.
- Understanding cortical sound processing is vital for SSD research.
Purpose of the Study:
- To investigate the relationship between speech sound disorder severity, measured by the percentage of correct consonants (PCC), and cortical auditory evoked potentials (CAEPs).
- To analyze how age influences CAEPs in children with varying degrees of SSD.
Main Methods:
- Twenty-nine children with normal hearing were categorized into three groups based on SSD severity (PCC index).
- Participants were further divided into age subgroups (60-71, 72-83, 83-94 months).
- Cortical auditory evoked potentials (CAEPs) were recorded using speech stimuli for all children.
Main Results:
- Older children demonstrated longer P1 and N1 latencies.
- Age significantly affected N2 latency, with older children showing longer durations.
- P2 latency was influenced by age, particularly in the severe SSD group.
Conclusions:
- CAEP amplitude was not affected by age or SSD severity.
- Latency of CAEPs generally increased with age in children.
- These findings highlight age-related maturation in auditory cortical processing in children with SSD.
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