VEMP (Vestibular Evoked Myogenic Potential) recording can be used as an indicator for various pathologies. In particular, it is the only clinical test that evaluates sacculus function in both ears individually. For this test, loud stimuli (min. 85 dB nHL) are used to evoke a response in the musculus sternocleidomastoideus.To increase tonus in the responding muscle, prone patients are asked to raise their head from the bed or, if sitting, turn their head to the non-stimulated side. A single test takes 30 seconds and is typically repeated several times.
ASSR is an invaluable diagnostic procedure for assessing the hearing of babies referred from hearing screening. However, the time required to perform reliable ASSR by traditional means (typically one hour) has been a disadvantage.
The new generation ASSR system from Interacoustics® contains two features that together will halve the time required to approximate the audiogram. The system is based on a stimulus form that maximizes the response from the basilar membrane and an advanced detection algorithm that analyses the information in the evoked response to extract frequency-specific information.