Evoked Potential

Auditory Evoked Response Testing in Infants and Children

Key Points

  • For auditory brainstem response (ABR) and auditory steady-state response (ASSR) testing, infants need to be well settled in a deep sleep for good quality recordings
  • Electrode contacts need to be good (low and balanced impedances) and the environment should be free of electrical noise to obtain quality evoked response recordings
  • Frequency-specific testing is easy to do and is essential for fitting of hearing instruments for children whose hearing loss has been detected via universal newborn screening
  • Clinicians do not need to wait for confirmation of evoked response testing with behavioral data hearing thresholds can be reliably estimated using evoked responses, although not for children with auditory neuropathy spectrum disorder
  • Bone conduction ABR should be performed when a hearing loss is identified using ABR or ASSR to determine whether there is a conductive component to the hearing loss
  • Cortical evoked responses can be used for showing that amplified speech stimuli are audible for young infants who are not able to provide reliable behavioral responses to sound
Evoked Response
ABR




ASSR

ECoG


MLR

​CAEP

Latency Range
0-15ms




0-15ms

0-3ms


15-50ms

​50-400ms

Clinical Applications
Newborn Hearing Screening
Diagnosis of ANSD
Retrocochlear Pathology
Estimation of Pure Tones

Estimation of Pure Tones

Diagnosis of ANSD
Estimation of Pure Tones

Assessment of Central Aud. Fx

Evaluation of Hearing Aids
Evaluation of hearing w/o ABR

Stimuli Typically Used
Single-Polarity Clicks
Single-Polarity Clicks
Single-Polarity Clicks
Brief Tonebursts

Freq or Amp mod tones

Single-polarity clicks

Tonebursts

Clicks
Speech Sounds
​Long duration toneburst

Evoked Potential
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San Francisco, California 94133
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