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Transient neurologic abnormalities and BAEPs in high-risk infants
I Kitamoto1, J Kukita, T Kurokawa
1Department of Pediatrics, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Insights
High-risk premature infants with transient neurological issues showed delayed brainstem auditory evoked potentials. This suggests temporary dysfunction in the auditory pathway during early infancy.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Auditory Neuroscience
Background:
- High-risk premature infants are susceptible to neurodevelopmental disabilities.
- Early identification of auditory pathway dysfunction is crucial for intervention.
- Brainstem Auditory Evoked Potentials (BAEPs) are a key tool for assessing auditory function in infants.
Purpose of the Study:
- To investigate BAEPs in high-risk premature infants with differing neurological outcomes.
- To identify early auditory pathway alterations in infants with transient neurological abnormalities.
- To compare BAEPs between neurodevelopmentally distinct groups of high-risk premature infants.
Main Methods:
- BAEPs were recorded in 77 high-risk premature infants and 60 low-risk controls.
- Infants were categorized into two groups based on neurological findings in the first year.
- Analysis focused on wave latencies and detectability at various infant ages and conceptional ages.
Main Results:
- Group I (transient abnormalities) showed prolonged III-V and I-V intervals and poor wave VI/VII detectability early on.
- Group II (normal findings) exhibited delayed wave VI detection only at 35-39 weeks of conceptional age.
- BAEPs indicated transient brainstem and upper auditory pathway dysfunction or delay in Group I infants.
Conclusions:
- Transient neurological abnormalities in high-risk premature infants are associated with early, temporary brainstem auditory pathway dysfunction.
- BAEPs can detect subtle, early maturational delays in the auditory system of high-risk infants.
- Findings highlight the utility of BAEPs for monitoring neurodevelopmental progress in premature infants.
Abstract:
We examined brainstem auditory evoked potentials in 2 neurodevelopmentally different groups of high-risk premature infants during the first year of life. Our 77 patients were considered at birth to be at risk for neurologic disabilities, but were found to have normal development in the second year of life. The patients were divided into 2 groups on the basis of their neurologic findings during the first year of life; 24 of the 77 patients demonstrated transient neurologic abnormalities (group I) and the remaining 53 demonstrated normal neurologic findings through the first year of life (group II). Normative data of brainstem auditory evoked potentials were obtained from 60 low-risk and neurologically normal infants. Group I patients had prolonged III-V and I-V intervals at 2 months of age or younger and poorly detectable waves VI and VII at 5 months of age or younger, compared with control subjects. Wave VI was poorly detected in group II patients only at 35-39 weeks of conceptional age. Brainstem auditory evoked potentials suggested that the patients with transient neurologic abnormalities had transient dysfunction or maturational delay in the brainstem and upper auditory pathway early in the first year of life.