Optimum Response Filter Setting for Air Conduction-Induced Ocular Vestibular Evoked Myogenic Potential

Area of Science:

• Neuroscience
• Audiology
• Vestibular System

Background:

• Inconsistent parameters in ocular vestibular evoked myogenic potential (oVEMP) studies lead to variable normative values.
• Response filter settings are a major source of non-uniformity across oVEMP research.
• Existing literature lacks evidence on how response filter variations impact oVEMP outcomes.

Purpose of the Study:

• To investigate the impact of varying response filter settings on oVEMP measurements.
• To determine the optimal band-pass filter for oVEMP recording.

Main Methods:

• A normative study utilizing a repeated measures design.
• Inclusion of young adults (18-35 years) and older adults (60-70 years).
• Contralateral air-conducted oVEMP recorded with various low-pass (500-3000 Hz) and high-pass (0.1-30 Hz) filter combinations.

Main Results:

• In young adults, increasing high-pass and low-pass filters significantly reduced n1 and p1 latencies.
• Peak-to-peak amplitude in young adults decreased with higher high-pass filters but was unaffected by low-pass filter changes.
• Older adults showed better response rates with a 0.1-1000 Hz filter compared to a 1-1000 Hz filter.

Conclusions:

• The 0.1-1000 Hz band-pass filter is optimal for oVEMP recording, maximizing amplitude without compromising signal-to-noise ratio.
• This filter setting improves response detection rates in older adults.
• Clinical oVEMP recordings should adopt the 0.1-1000 Hz filter for enhanced amplitude and detection probability.