Improving vestibular evoked myogenic potential reliability by using a blood pressure manometer

Area of Science:

• Neuroscience
• Otolaryngology
• Biomedical Engineering

Background:

• Vestibular evoked myogenic potentials (VEMP) are crucial for assessing vestibular and cochlear nerve function.
• Variability in sternocleidomastoid muscle (SCM) contraction can reduce VEMP test reliability.
• Existing methods for controlling SCM contraction may be complex or inconsistent.

Purpose of the Study:

• To introduce and evaluate a novel, accessible feedback method for controlling SCM contraction during VEMP testing.
• To enhance the reliability and consistency of VEMP amplitude measurements.

Main Methods:

• A prospective study involving healthy subjects.
• A feedback method using a blood pressure manometer cuff to standardize SCM contraction intensity.
• Measurement of mean rectified voltage (MRV) of SCM activity and VEMP amplitude variability.
• Comparison of VEMP amplitude variability with and without the feedback method.

Main Results:

• No significant learning or fatigue effects were observed during SCM contraction using the feedback method.
• SCM contraction intensity (MRV) remained consistent before and during VEMP testing.
• VEMP amplitude variability was significantly reduced when employing the feedback method.

Conclusions:

• The proposed feedback method offers a reliable and effective way to control SCM contraction for VEMP testing.
• This technique significantly improves the amplitude reliability of VEMP recordings.
• The method is practical due to the use of readily available equipment.