VEMP test

Service Description

The VEMP test (Vestibular Evoked Myogenic Potentials) is a diagnostic tool used to assess the function of the inner ear’s otolith organs (saccule and utricle) and their neural pathways. It helps identify causes of dizziness, vertigo, and balance disorders by recording muscle responses to sound or vibration stimuli. 🧠 What is the VEMP Test? Definition: VEMP stands for Vestibular Evoked Myogenic Potentials. Purpose: Evaluates the integrity of the vestibular system, specifically the saccule, utricle, and vestibular nerve branches. Clinical Use: Commonly used to diagnose conditions like Meniere’s disease, vestibular neuritis, superior canal dehiscence, and other balance disorders. ⚙️ How the Test Works Stimulus: Patients hear clicks or tone bursts through headphones, or feel vibrations applied to the skull. Electrodes: Small sticky patches are placed on muscles (neck or under the eyes). Response: The sound/vibration triggers reflexes in these muscles, which are recorded as electrical signals. Types of VEMP: cVEMP (Cervical VEMP): Recorded from the sternocleidomastoid muscle in the neck; assesses saccule and inferior vestibular nerve. oVEMP (Ocular VEMP): Recorded from the extraocular muscles (beneath the eyes); assesses utricle and superior vestibular nerve. 🎯 Why It’s Important Non-invasive: Safe and relatively quick. Complementary: Adds information beyond traditional vestibular tests (which mainly assess semicircular canal function). Diagnostic Value: Helps pinpoint whether dizziness/imbalance is due to otolith organ dysfunction rather than canal issues. ⚠️ Limitations & Considerations Patient Cooperation: Requires muscle activation (e.g., turning head for cVEMP). Age Factor: Responses may diminish with age. Not Standalone: Usually combined with other vestibular tests for a full picture.