The Ocular VEMP (oVEMP) tests the function of which vestibular end-organ?

• A Utricle via the superior vestibular nerve ✓
• B Saccule via the inferior vestibular nerve
• C Horizontal semicircular canal via the superior vestibular nerve
• D Posterior semicircular canal via the inferior vestibular nerve

Explanation

The ocular VEMP (oVEMP) reflects utricular function. It is a crossed reflex — sound or vibration stimulates the utricle, travels via the superior vestibular nerve to the medial vestibular nucleus, crosses the midline and activates the contralateral inferior oblique muscle (recorded under the contralateral eye). The cervical VEMP tests saccular function via the inferior vestibular nerve through the uncrossed sacculo-collic reflex.

Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.