<prompt> Vestibular Evoked Myogenic Potential VEMP detects lesion of -Cochlear NerveSuperior Vestibular NerveInferior Vestibular NerveInflammatory Myopathy  <response>: Vestibular Evoked Myogenic PotentialsThe vestibular evoked myogenic potential VEMP are short latency electro myograms that are evoked by acostic stimuli in high intensity and recorded from surface electrodes over the tonically contracted sternocleido mastoid muscle.The origin of VEMP is the saccule.The response pathway consists of: Saccule; Inferior Vestibular Nerve, Lateral Vestibular Nucleus, Lateral Vestibulospinal Tract and Sternocleidomastoid muscle.The test provides diagnostic information about saccular andor inferior vestibular nerve function.An intact middle ear is required for the response quality.Waveform of the responseThe VEMP waveform is characterised by aWave I positive peak at 13-15 p13Wave II negative peak at 21-24 ms p23Peak to peak amplitude of p13-23 is measured and asymmetries between the right and left side is noted by calculating asymmetry ratio ARAbnormal AR is seen a case of:Saccular hydrops AR 36Vestibular schwannoma orignating from inferior vestibular nerve.Vestibular neuronitisSuperior canal dehiscence syndrome. 