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Electrophysiologic assessment of auditory pathways in high risk infants
B Cone-Wesson1, D Kurtzberg, H G Vaughan
1Department of Otorhinolaryngology, Albert Einstein College of Medicine, Bronx, NY 10461.
Insights
This study assessed auditory processing in high-risk infants using electrophysiology. Most infants showed normal auditory brainstem response, middle latency response, and cortical auditory evoked potential results.
Area of Science:
- Neuroscience
- Audiology
- Developmental Pediatrics
Background:
- Infants born with low birthweight or experiencing perinatal asphyxia are at increased risk for hearing and language impairments.
- Early identification of auditory processing deficits is crucial for timely intervention.
Purpose of the Study:
- To evaluate the auditory processing capabilities of infants at high risk for hearing and language disorders.
- To assess the integrity of the peripheral, brainstem, and cortical auditory pathways using electrophysiological measures.
Main Methods:
- Electrophysiological assessment including auditory brainstem response (ABR), middle latency response (MLR), and cortical auditory evoked potential (CAEP).
- Evaluation of 59 infants at risk due to low birthweight and/or perinatal asphyxia.
Main Results:
- 63% of infants had normal peripheral auditory function or slight unilateral impairment.
- 84% demonstrated normal brainstem auditory system function.
- 82% showed normal MLRs, and 81% showed normal CAEPs.
- 53% of infants were normal across all tests; only 3% were abnormal on all tests, with others showing mixed abnormalities.
Conclusions:
- The majority of high-risk infants in this cohort exhibited normal auditory pathway function across peripheral, brainstem, and cortical levels.
- While most infants performed normally, a significant portion displayed varied patterns of auditory processing abnormalities, highlighting the need for comprehensive audiological evaluations.
Abstract:
This study evaluated auditory processing in a group of 59 infants at risk for subsequent hearing and language disorders due to low birthweight and/or perinatal asphyxia. Auditory system integrity was evaluated electrophysiologically by recording the auditory brainstem response (ABR), middle latency response (MLR) and the cortical auditory evoked potential (CAEP). 63% of the babies had normal peripheral function or slight unilateral impairment; 84% had normal brainstem auditory system function; 82% showed normal MLRs; and 81% showed normal CAEPs. Fifty-three percent of the babies were normal on all tests and only 3% were deviant on all tests. The remaining infants showed diverse patterns of peripheral, brainstem and cortical abnormalities.