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Study of aged central auditory function using the auditory middle latency response.

Anna Caroline Silva De Oliveira1, Yara Bagali Alcântara1, Viviane Borim De Góes1

  • 1Postgraduate Program, Faculty of Philosophy and Sciences (FFC), Universidade Estadual Paulista (UNESP), Marília, SP, Brazil.

Clinics (Sao Paulo, Brazil)
|July 21, 2023
PubMed
Summary
This summary is machine-generated.

Auditory processing declines with age, particularly with high-frequency hearing loss. Middle latency auditory evoked potentials (MLRs) effectively detect age-related auditory cortex dysfunction, especially in unilateral stimulation scenarios.

Keywords:
Acoustic stimulationAgedAuditory cortexAuditory evoked potentials

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Area of Science:

  • Neuroscience
  • Audiology
  • Gerontology

Background:

  • Aging significantly impacts auditory function, affecting neural pathways.
  • Peripheral hearing loss, common in the elderly, can exacerbate auditory processing deficits.

Purpose of the Study:

  • To investigate auditory function in the elderly using middle latency auditory evoked potentials (MLRs).
  • To assess the effects of aging and high-frequency hearing loss on auditory processing.

Main Methods:

  • Studied two groups of individuals over 60: one healthy group and one with high-frequency hearing loss.
  • Recorded auditory evoked potentials with unilateral and bilateral stimulation.
  • Calculated the Binaural Interaction Component (BIC).

Main Results:

  • Latency of auditory evoked potential components varied between groups and stimulation types.
  • Amplitude differences were observed, particularly in the Na-Pa and Pb components.
  • MLRs showed distinct patterns in healthy elderly individuals versus those with hearing loss.

Conclusions:

  • Auditory information transmission to the primary auditory cortex is impaired by aging, especially with unilateral stimulation and peripheral hearing loss.
  • MLRs are sensitive tools for identifying age-related neuroauditory disorders and primary auditory cortex dysfunction.
  • The study highlights the utility of MLRs in evaluating auditory processing in the elderly, particularly those with high-frequency hearing loss.