Comparison of Cochlear Implant Efficacy in Pre- Versus Postsynaptic Auditory Neuropathy: A Systematic Review

Area of Science:

• Audiology
• Neuroscience
• Genetics

Background:

• Etiological factors influencing cochlear implant (CI) outcomes are established.
• A direct comparison of CI efficacy based on lesion location (presynaptic vs. postsynaptic neuropathy) is needed.

Purpose of the Study:

• To systematically review and compare the effectiveness of CIs in patients with presynaptic versus postsynaptic auditory neuropathy.

Main Methods:

• A comprehensive literature search was performed across major scientific databases.
• Studies were selected if they examined CI efficacy in auditory neuropathy spectrum disorder, differentiating lesion types via genetic or electrophysiological methods.

Main Results:

• Seven studies indicated etiological diagnosis is crucial for predicting CI outcomes.
• Genetic mutations correlated with better CI outcomes, underscoring the role of genetic etiology.
• Electrophysiological measures aided in assessing auditory function, highlighting diagnostic value.

Conclusions:

• Etiological factors generally impact CI outcomes, with varying success between pre- and postsynaptic neuropathies.
• Integrating genetic and electrophysiological diagnostics is vital for predicting CI performance.
• Personalized approaches are needed for evaluating CI candidates for effective auditory rehabilitation.