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Auditory nerve-brain stem responses (ABR) in children with developmental brain disorders and in high risk neonates
Insights
Auditory nerve-brain stem evoked responses (ABR) can identify brain damage in children with developmental disorders. Abnormal ABRs in at-risk newborns may predict future neurological and cognitive dysfunctions, aiding early detection.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Auditory Neurophysiology
Background:
- Auditory nerve-brain stem evoked responses (ABR) are established tools for evaluating auditory and neurological disorders.
- Developmental brain disorders in children include psycho-motor retardation, minimal brain dysfunction, cerebral palsy, and autism.
Purpose of the Study:
- To demonstrate the utility of ABRs in assessing children with developmental brain disorders.
- To investigate the potential of ABRs for early detection of brain dysfunction in at-risk neonates.
Main Methods:
- ABR recordings were performed on children diagnosed with developmental brain disorders.
- ABR testing was also conducted on high-risk neonates and infants, with some undergoing repeated testing.
- A longitudinal experimental protocol was designed for hypothesis evaluation.
Main Results:
- Abnormal ABRs were observed in a significant number of children with developmental brain disorders, suggesting underlying brain damage.
- Abnormal ABRs were also prevalent in high-risk neonates and infants, with some showing improvement over time.
- Findings support a link between congenital-perinatal-neonatal insults, brain damage detectable by ABR, and later developmental disorders.
Conclusions:
- ABR abnormalities in neonates with perinatal insults may indicate brain damage.
- Neonatal ABR recordings can potentially predict later neurological, behavioral, and cognitive dysfunctions.
- ABR serves as a valuable tool for early detection and prediction of brain dysfunction in at-risk infants.
Abstract:
Auditory nerve-brain stem evoked responses (ABR) have been used for many years to evaluate auditory and neurological disorders. This study is devoted to the demonstration that ABRs can also contribute to the assessment of children with developmental brain disorders, e.g. psycho-motor retardation, minimal brain dysfunction, cerebral palsy and autism. The ABR in many of these children was abnormal, providing evidence for the presence of brain damage in these children which is probably responsible for the disorder they display. Since many of these children suffered from some congenital, perinatal or neonatal insult, ABR recording was also conducted in high risk neonates and young infants. Many of these neonates and infants had abnormal ABRs and, in several, there was improvement of the ABR upon repeated testing. These findings of abnormal ABRs in children with developmental brain disorders who suffered a perinatal insult and abnormal ABRs in neonates who suffered such an insult lead to the following hypothesis: a congenital-perinatal-neonatal insult can cause, at the time of its occurrence, some form of brain damage which may be demonstrated by abnormal ABRs. The same underlying brain damage may also cause developmental brain disorders which become apparent when he is older. Therefore ABR recording during the neonatal period may contribute to the early detection of brain dysfunction in at-risk neonates and may predict the later appearance of neurological, behavioural and cognitive dysfunctions. A longitudinal experimental protocol for the testing and evaluation of this hypothesis is presented.