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Brainstem auditory evoked potentials in severely malnourished children with kwashiorkor
Insights
Severe malnutrition in children, known as kwashiorkor, is linked to auditory pathway abnormalities. Brainstem auditory evoked potentials (BAEPs) revealed persistent issues even after treatment, suggesting potential myelination defects.
Area of Science:
- Neuroscience
- Pediatrics
- Auditory Neuroscience
Background:
- Severe malnutrition, particularly kwashiorkor, poses significant health risks to children.
- Auditory pathway development and function can be impacted by nutritional deficiencies.
Purpose of the Study:
- To investigate auditory brainstem pathway function in children with kwashiorkor using brainstem auditory evoked potentials (BAEPs).
- To assess changes in BAEPs after nutritional rehabilitation and explore correlations with growth and biochemical markers.
Main Methods:
- Brainstem auditory evoked potentials (BAEPs) were recorded in 22 children with kwashiorkor and compared to healthy controls.
- Recordings were repeated after three weeks of treatment.
- Analysis included interpeak latencies (IPLs) and the effect of stimulus rate.
Main Results:
- Abnormal BAEP interpeak latencies (IPLs) were observed in 32% initially and 40% after treatment in the kwashiorkor group.
- Abnormalities affected I-III, III-V, and I-V IPLs, often unilaterally.
- BAEP abnormalities did not correlate with growth indices, serum albumin, or hemoglobin levels.
Conclusions:
- Children with kwashiorkor exhibit auditory brainstem pathway dysfunction, potentially due to myelination defects.
- These auditory abnormalities may persist despite nutritional treatment.
- Further research is needed to understand the long-term implications and underlying mechanisms.
Abstract:
Brainstem auditory evoked potentials (BAEPs) were recorded in a group of 22 children hospitalized for the treatment of severe malnutrition (kwashiorkor). Recordings were repeated after three weeks of treatment. The control group consisted of age- and sex-matched healthy infants. Abnormal BAEP interpeak-latencies (IPLs) were found in 32% of the kwashiorkor group in the initial recording and in 40% of this group in the follow-up recording. Abnormalities were evenly distributed between the I-III, III-V and I-V IPLs and in the majority of cases were unilateral. The influence of increasing stimulus rate was investigated. The findings may reflect defects in myelination of auditory brainstem pathways, however, BAEP abnormalities were not related to several indices of growth retardation or to serum albumin and hemoglobin levels.