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Developmental changes of contralateral brainstem auditory evoked potentials: evaluation of brainstem maturation
T Ichiyama1, T Hayashi, S Furukawa
1Department of Pediatrics, Yamaguchi University School of Medicine, Japan.
Brain & Development
|January 1, 1995
Summary
Brainstem auditory evoked potentials (BAEPs) in children reveal distinct contralateral wave patterns that change with age. These evolving waveforms, classified as infantile, transient, and adult types, aid in assessing brainstem maturation.
Area of Science:
- Neuroscience
- Audiology
- Developmental Pediatrics
Background:
- Brainstem auditory evoked potentials (BAEPs) are crucial for assessing auditory pathway function.
- Understanding developmental changes in BAEPs is essential for diagnosing neurological conditions in infants and children.
- Contralateral waveform analysis in BAEPs has shown potential for evaluating brainstem maturation.
Purpose of the Study:
- To analyze contralateral brainstem auditory evoked potential (BAEP) waveforms in normal subjects across a wide age range (0 days to 21 years).
- To characterize the developmental changes in contralateral BAEP waveforms and identify age-related patterns.
- To evaluate the utility of contralateral BAEP waveform analysis for assessing functional maturation of the brainstem.
Main Methods:
- Bilateral BAEP recordings were performed on 147 normal subjects aged 0 days to 21 years using monaural stimulation.
- Detailed analysis focused on contralateral (opposite to stimulation) wave components.
- Contralateral waveforms were classified into three types (infantile, transient, adult) based on peak characteristics and age distribution.
Main Results:
- Contralateral wave II' and III' complex latencies were shorter than ipsilateral wave III.
- Ipsilateral wave V latencies were shorter than contralateral wave V latencies.
- Contralateral wave II' and III' complex evolved with age, transitioning from single/broad peaks (infantile/transient) to double peaks (adult).
- Infantile type observed in infants <14 months, transient type from 1 month to 15 years, and adult type in individuals >13 months.
Conclusions:
- Contralateral BAEP waveform analysis provides valuable insights into the functional maturation of the brainstem in developing individuals.
- The identified age-related waveform types (infantile, transient, adult) serve as normative data for developmental assessment.
- This method offers a non-invasive tool for evaluating pediatric brainstem auditory pathway development and identifying potential abnormalities.