The velocity step test(VST)is a rotary test that evaluates vestibular function,reflecting the function of the horizontal vestibular-ocular reflex and the velocity storage mechanism.This paper reviews the examination mecha-nism,clinical manifestations,examination,and influencing factors related to VST.In VST,the time constant(Tc)and peak gain are the two primary parameters.A short Tc is commonly associated with unilateral or bilateral peripheral ves-tibular lesions,while a prolonged Tc may m be linked to central processing defects.Although the importance of peak gain is slightly less than that of Tc,it can provide supplementary verification for Tc.Tc can be converted with the phase of sinusoidal harmonic acceleration test,allowing these two tests to complement each other in a clinical setting.In prac-tical applications,Tc can be influenced by factors such as the order of examination,rotation chair speed,head position,adaptability and alertness,alcohol effect,and visual conditions.Currently,the use of VST in vestibular research is main-ly focused on describing its performance in caloric tests and motion sickness.Further research is needed to explore its potential applications in other areas.
velocity step testvelocity storage mechanismtime constantvestibular research
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