The sound-related brainstem reaction (ABR), moreover called brainstem evoked reaction audiometry (BERA), is an sound-related evoked potential extricated from progressing electrical movement within the brain and recorded...
The sound-related brainstem reaction (ABR), moreover called brainstem evoked reaction audiometry (BERA), is an sound-related evoked potential extricated from progressing electrical movement within the brain and recorded through terminals put on the scalp.
The measured recording may be a arrangement of six to seven vertex positive waves of which I through V are assessed. These waves, labeled with Roman numerals in Jewett and Williston tradition, happen within the to begin with 10 milliseconds after onset of an sound-related jolt.
Types
In general, there are three types of ABR tests
Click-evoked BERA
This test assesses the function of the auditory nerve and lower brainstem pathways responsible for processing clicks.
Tone Burst ABR Test
This test assesses the function of the auditory nerve and brainstem pathways responsible for processing plosives of different frequencies.
Voice-guided ABR test
This test assesses the function of the auditory nerve and brainstem pathways involved in processing speech. All three types of BERA tests use electrodes placed on the scalp to measure electrical activity in response to sound stimuli.
BERA test results can help diagnose a variety of conditions that affect hearing and the auditory system, including hearing loss, auditory nerve dysfunction, and brainstem disorders.
Material and method
Methodology
This study was conducted in otolaryngology and pediatrics. The study period was between December 2011 and October 2013, with institutional ethics committee approval and parental consent.
Inclusion Criteria
Thirty consecutive AGA neonates presented in the GSVM hospital NICU with total serum bilirubin requiring intervention (according to American Academy of Pediatrics guidelines) were included as cases in the study, and 30 AGA neonates had normal duration and uneventfulness.
Perinatal period and the highest measured serum bilirubin. After obtaining informed consent, <12 mg/dl for term infants was included as a control.
Exclusion criteria
- Newborns born with birth asphyxia with low APGAR scores.
- Intrauterine infection.
- Sepsis.
- Meningitis/encephalitis.
- Drugs such as aminoglycoside administration.
- Craniofacial malformation.
- Conjugated hyperbilirubinemia.
- Outer and middle ear pathologies.
- Kernicterus.
