title: Rise/fall and plateau time optimization for cervical vestibular-evoked myogenic potential elicited by short tone bursts of 500 Hz.
abstract: OBJECTIVE
  Literature on clinical utility of cervical vestibular-evoked myogenic potential (cVEMP) has been increasing rapidly, though not without inconsistencies in spite of involving similar populations. Close examination of methods across studies exposed the use of variable stimulus parameters, especially rise/fall time (R/FT) and plateau time (PT) as the possible reason. However the effect of variation in R/FT and PT on cVEMP response parameters has been largely uncharted.
  
  
  METHODS
  The study aimed at evaluating the impact of R/FT and PT on cVEMPs elicited by 500-Hz short tone-bursts (STBs) at 95 dB nHL using R/FT from 1 to 4 ms and PT from 0 to 3 ms.
  
  
  METHODS
  30 healthy individuals with normal audio-vestibular system.
  
  
  RESULTS
  Significant prolongation of latencies with increasing R/FT and PT (p < 0.05) was noticed. The amplitude however varied significantly only for some R/FTs and PTs. R/FT of 2 ms, in combination with 1-ms PT, produced large amplitudes with lowest variability in amplitude and latency parameters.
  
  
  CONCLUSIONS
  R/FT of 2 ms along with PT of 1 ms formed a good amalgamation and could be considered optimum for clinical recording of cVEMPs elicited by 500-Hz STBs, although slight deviances in these parameters might not impact the outcome significantly.
authors.affiliation: Department of Audiology, All India Institute of Speech and Hearing , Manasagangothri, Mysore , India.
authors.forename: Niraj Kumar
authors.initials: NK
authors.lastname: Singh
authors.forename: Prawin
authors.initials: P
authors.lastname: Kumar
authors.forename: T H
authors.initials: TH
authors.lastname: Aparna
authors.forename: Animesh
authors.initials: A
authors.lastname: Barman
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D000293:Adolescent; D000328:Adult; D004576:Electromyography; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D007700:Kinetics; D008297:Male; D011930:Reaction Time; D058585:Vestibular Evoked Myogenic Potentials; D055815:Young Adult
keywords: cVEMP; plateau time; rise/fall time