Regarding cervical vestibular evoked myogenic potential (cVEMP), two studies found no difference in latencies or amplitudes between MD and VM patients. However, Taylor et al showed that cVEMP asymmetry ratios for 500 Hz tone bursts were significantly higher for MD than VM. Also they show that the ratio of cVEMP amplitude generated by tone bursts at a frequency of 500 Hz to that generated by 1 kHz was significantly lower for MD affected ears than for VM or controls ears. In concordance, Murofushi et al showed significantly smaller cVEMP amplitudes to 500 Hz tone busts on the affected side of MD.
So what are the standards？
Both diseases could be overlapped with each others but the case history helps symptoms such as headache, photophobia, Phonophobia is usually seen in VM.
Hello, I cannot answer this question however, my colleague Dr. Richard Gans at the American Institute of Balance should be able to help you: [email protected]. Please mention that I referred you. Good luck! Bob DiSogra
Thank you very much for your help! Robert Disogra
I am gonna contact him.
And I think that a combination is needed for a complete assessment of inner ear function for correct diagnosis between MD and VM.
Based on the previous reference, we have found that audiometry is indispensable as a diagnostic criterion of MD because low-frequency hearing loss can be a sign of MD. Moreover, a test battery - VEMP, Caloric tests and vHIT combined, can all be used together to differentiate between diagnosing MD and VM.
yes, audiometry and Ecochg May be helpful in assessing MD,
While assessing cases for VM, along with VEMP, caloric, VNG also may add some information. optokinetic test of VNG may show some abnormality. Occulomotor test may help screen for other central issues.
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