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VEMP and VSR
Balance Assessment
12
Audiology
Graduate
05/07/2018

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Term
first to report vestibular responses to sound in normal human subjects and prove they were not mediated by the cochlea. Also described small head movements toward the stimulated ear following high-level (122-134 dB SPL) 1000 Hz tones and suggested may be result of otolith organ stimulation
Definition
Von Bekesy
Term
People who discovered:
-First electrical responses to sound from the vestibular system recorded
-Responses improved be fenestration of SCC
Definition
De Vries and Bleeker 1949
Term
People who studied:
-Recorded frequency following responds (FFR) and middle latency response (MLR) from deaf subjects with normal vestibular function, and showed absent FFR and MLR in deaf subjects with hypovestibular function
-Improved recordings following fenestration of SCC
Definition
Ribaric and colleagues 1980s
Term
List the two main types of vestibular responses which are measured using electrophysiology
Definition
Compound action potentials generated by the peripheral vestibular system and its central pathway. Elicited by head motion/vestibular stimulation
Term
Identify what type of neuron is measured during VsER
Definition
Vestibular neurons
Term
Discuss why vestibular evoked responses are not used clinically at this time
Definition
There is no standard protocol and there are inconsistent results in human studies
Term
List three subject variables which influence the vestibular evoked response
Definition
Core temperature, level of anesthesia, and age
Term
Identify what type of neuron is being measured during VEMP testing
Definition
Motor output responses elicited by intense sound presented to the ear
Term
Absence or thinning of the temporal bone between the apex of the SCC and the middle cranial fossa
Definition
Semicircular Canal Dehiscence
Term
List two methods of eliciting the cVEMP response
Definition
A tone or tap on the head
Term
Response of the cVemp and oVEMP:
-cVEMP: Recording from the ___ muscle primarily gives us information
-oVEMP: Information recorded from the ___ muscles primarily gives us information from from the saccule the utricle. Smaller magnitude of cVEMP; requires ___ amplification of the signal being recorded
Definition
sternocleidomastoid; ocular; more
Term
when the oVEMP peak occurs and the oVEMP negative deflection occurs:
-Negative peak followed by a ___ peak
-Negative peak occurs at about ___ msec
-Positive peak occurs at about ___ msec
Definition
positive; 11; 15
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