Past, present, and future applications of the auditory middle latency response

Area of Science:

• Audiology
• Neuroscience
• Electrophysiology

Background:

• Middle Latency Response (MLR) has been a long-standing electrophysiological method for frequency-specific auditory threshold estimation.
• The 40 Hz auditory evoked potential, a derivative of MLR, presents enhanced potential for threshold testing.
• MLR also shows promise in evaluating functional hearing loss and higher auditory functions.

Purpose of the Study:

• To analyze the established values and inherent limitations of MLR.
• To examine the current and future research and clinical applications of MLR.
• To address controversies surrounding MLR, including its origin and use in pediatric assessment.

Main Methods:

• Review of past, present, and future research on MLR.
• Analysis of clinical applications of MLR.
• Discussion of ongoing debates regarding MLR's origin and filtering effects.

Main Results:

• MLR is a proven method for estimating auditory thresholds.
• The 40 Hz potential offers improved accuracy for threshold testing.
• MLR has potential applications in functional hearing loss and higher auditory function assessment.
• Controversies exist regarding MLR's origin, filtering, and pediatric use.

Conclusions:

• MLR remains a valuable audiological tool with evolving applications.
• The 40 Hz potential represents a significant advancement in auditory threshold testing.
• Further research is needed to resolve MLR-related controversies and optimize its clinical utility.