New perspectives on vestibular evoked myogenic potentials

Area of Science:

• Neuroscience
• Otolaryngology
• Vestibular System Research

Background:

• The cervical vestibular evoked myogenic potential (cVEMP) is established for otolith function assessment.
• The ocular vestibular evoked myogenic potential (oVEMP) is a newer test, emerging as a valuable tool.

Purpose of the Study:

• To review recent advancements in VEMP research.
• To focus on the diagnostic utility and characteristics of the oVEMP.

Main Methods:

• Review of recent scientific literature on VEMP, particularly oVEMP.
• Comparison of oVEMP and cVEMP findings with other vestibular tests.

Main Results:

• oVEMP likely originates from superior vestibular nerve afferents; sound-evoked cVEMP from inferior vestibular nerve reflexes.
• oVEMP shows stronger correlation with caloric and subjective visual vertical tests than sound-cVEMPs.
• Vestibular disorders like superior semicircular canal dehiscence and Ménière's disease alter oVEMP and cVEMP frequencies.

Conclusions:

• oVEMP provides diagnostic information complementary to cVEMP.
• oVEMP is expected to become a valuable component of neuro-otological diagnostic testing.