scholarly journals Ageing effect on air-conducted ocular vestibular evoked myogenic potential

2015 ◽  
Vol 5 (2) ◽  
Author(s):  
Kaushlendra Kumar ◽  
Jayashree S. Bhat ◽  
Nimalka Maria Sequeira ◽  
Kiran M. Bhojwani
Keyword(s):  
Older Adult ◽  
Response Rate ◽  
Tone Burst ◽  
Age Group ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Ocular Vemp ◽  
Age Related ◽  
Significant Difference ◽  
Middle Aged Adults

One of the recent diagnostic tests to assess the function of otolithic organs is through vestibular evoked myogenic potential (VEMP) testing. There are equivocal findings on effect of aging on ocular VEMP (oVEMP) parameters with reference to latencies. Hence this study was taken up to investigate the age related changes in oVEMP parameters. This present study considered 30 participants in each age group i.e., young adults, middle-aged adults and older adults. oVEMP were recorded using insert earphone at 100dBnHL at 500hZ short duration tone burst. The results showed in older adult significant difference in response rate, latencies and amplitude as compared to young and middle adult. Hence age should be taken into consideration when interpreting oVEMP results.

scholarly journals Ocular Vestibular Evoked Myogenic Potential Using Different Test Stimuli

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Dessai Teja Deepak ◽  
Jayashree S. Bhat ◽  
Kaushlendra Kumar
Keyword(s):  
Short Duration ◽  
Single Channel ◽  
Tone Burst ◽  
Acoustic Stimulation ◽  
Peak Amplitude ◽  
Clinical Population ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Significant Difference ◽  
Channel Electrode

Aim. Ocular Evoked Myogenic Potential (oVEMP) are short latency potentials evoked by higher acoustic stimulation. In this study, we aimed at comparing the click, 500 Hz mixed modulated, and 500 Hz short duration tone burst stimuli using oVEMP. Material. Click, 500 Hz mixed modulated and 500 Hz short duration tone burst stimuli were used for the study. Method. Conventional sampling and conveneint study design were used. Sixty healthy subjects underwent contralateral oVEMP testing maintaining 30 degrees upward gaze. Single channel electrode montage was applied to record oVEMP response. Results. On statistical analysis the three stimuli evoked equal response rates (100%), and when latency of n1 and p1 and peak-peak amplitude were compared, the click evoked showed significantly early latency and lower peak-peak amplitude than the 500 Hz stimuli. Five hundred Hz stimuli did not show significant difference in latency and peak-peak amplitude of n1-p1. Discussion. Thus, 500 Hz stimuli can evoke better latency and peak-peak amplitude. oVEMP has good clinical significance in diagnosing subjects with vestibular dysfunction. To add to the sensitivity of the oVEMP test, 500 Hz stimuli may also be used as it can evoke better oVEMP responses in clinical population with good morphology.

scholarly journals The Effects of Different Types of Stimulus and its Test-Retest Reliability on Cervical Evoked Myogenic Potential (Cvemp) Results

2017 ◽  
Vol 16 (1) ◽  
Author(s):  
Mohamad Amir Faisal Mohd Saufi ◽  
Nur Hafizah Sulaiman ◽  
Sarah Rahmat
Keyword(s):  
Tone Burst ◽  
Vestibular Evoked Myogenic Potential ◽  
Suprasternal Notch ◽  
Active Electrode ◽  
Good Test ◽  
Retest Reliability ◽  
Factors Affecting ◽  
Myogenic Potential ◽  
Significant Difference ◽  
Test Retest Reliability

Introduction: The Cervical Vestibular Evoked Myogenic Potential (cVEMP) is used to evaluate the integrity of saccule and inferior vestibular nerve. There are a lot of factors affecting cVEMP results including stimulus types. This study was carried out to determine the effects of different stimuli on cVEMP results and its test-retest reliability. Materials and method: 25 normal hearing subjects were recruited. The cVEMP testing were performed in 2 sessions with 1 week gap between each sessions. The cVEMP waveforms were recorded in sitting upright position with electrodes placed at; i) upper one-third of sternocleidomastoid muscle for active electrode, ii) suprasternal notch for inactive electrode and, iii) middle of forehead for the ground electrode. The stimuli (500Hz tone burst, click, narrowband chirp and broadband chirp) were presented via insert phone at 95dBnHL. The cVEMP results (P13-N23 peak-to-peak amplitude, P13 latency and N23 latency) were recorded. Results: Result showed; i) 500Hz tone burst produced significantly largest amplitude; ii) narrowband chirp produced significantly shortest P13 latency; iii) broadband chirp produced significantly shortest N23 latency; iv) no significant difference of P13 and N23 latency were observed between two sessions; and v) significant difference of P13-N23 amplitude were observed between two sessions for all stimuli except for narrowband chirp. Conclusion: The 500Hz tone burst was observed to be the most ideal stimulus (produce highest amplitude). All stimuli produced good test-retest reliability in terms of latency. However, most of the stimuli produced poor test-retest reliability in terms of amplitude except for narrowband chirps.

Clinical Experience with the Vestibular Evoked Myogenic Potential

2004 ◽  
Vol 15 (03) ◽  
pp. 198-215 ◽  
Author(s):  
David A. Zapala ◽  
Robert H. Brey
Keyword(s):  
Test Performance ◽  
False Positive ◽  
Patient Population ◽  
Clinical Performance ◽  
Tone Burst ◽  
Caloric Test ◽  
Older Patient ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Age Related

The vestibular evoked myogenic potential (VEMP) is a promising test of the descending vestibulocollic system. Our aim was to determine whether the VEMP can be applied to an older patient population and can detect lesions in descending vestibulospinal pathways. We also compared VEMP clinical performance with that of the standard caloric test. VEMP test performance was retrospectively analyzed in relation to clinical diagnosis and other vestibular test performance in 62 patients (age, 30–85 years) referred for vestibular testing to Mayo Clinic, Jacksonville, Florida. The VEMP was evoked using a 250 Hz tone burst. Results suggest age-related changes in VEMP amplitude and latency in this patient population. VEMP tests were sensitive to lesions not detected by electronystagmography. VEMP and caloric sensitivity and specificity were essentially equal (d′ = 1). Combining both tests improved sensitivity. However, VEMP false-positive rates hampered specificity. VEMP testing may be refined to improve false-positive rates and clinical utility.

scholarly journals Toward Optimizing cVEMP: 2,000-Hz Tone Bursts Improve the Detection of Superior Canal Dehiscence

2018 ◽  
Vol 23 (6) ◽  
pp. 335-344 ◽  
Author(s):  
Kimberley S. Noij ◽  
Barbara S. Herrmann ◽  
John J. Guinan Jr. ◽  
Steven D. Rauch
Keyword(s):  
Roc Analysis ◽  
Matched Control ◽  
Tone Burst ◽  
Sound Level ◽  
Vestibular Evoked Myogenic Potential ◽  
Superior Semicircular Canal Dehiscence ◽  
Myogenic Potential ◽  
Superior Canal Dehiscence ◽  
Inferior Vestibular Nerve ◽  
Canal Dehiscence

Background: The cervical vestibular evoked myogenic potential (cVEMP) test measures saccular and inferior vestibular nerve function. The cVEMP can be elicited with different frequency stimuli and interpreted using a variety of metrics. Patients with superior semicircular canal dehiscence (SCD) syndrome generally have lower cVEMP thresholds and larger amplitudes, although there is overlap with healthy subjects. The aim of this study was to evaluate which metric and frequency best differentiate healthy ears from SCD ears using cVEMP. Methods: Twenty-one patients with SCD and 23 age-matched controls were prospectively included and underwent cVEMP testing at 500, 750, 1,000 and 2,000 Hz. Sound level functions were obtained at all frequencies to acquire threshold and to calculate normalized peak-to-peak amplitude (VEMPn) and VEMP inhibition depth (VEMPid). Third window indicator (TWI) metrics were calculated by subtracting the 250-Hz air-bone gap from the ipsilateral cVEMP threshold at each frequency. Ears of SCD patients were divided into three groups based on CT imaging: dehiscent, thin or unaffected. The ears of healthy age-matched control subjects constituted a fourth group. Results: Comparing metrics at all frequencies revealed that 2,000-Hz stimuli were most effective in differentiating SCD from normal ears. ROC analysis indicated that for both 2,000-Hz cVEMP threshold and for 2,000-Hz TWI, 100% specificity could be achieved with a sensitivity of 92.0%. With 2,000-Hz VEMPn and VEMPid at the highest sound level, 100% specificity could be achieved with a sensitivity of 96.0%. Conclusion: The best diagnostic accuracy of cVEMP in SCD patients can be achieved with 2,000-Hz tone burst stimuli, regardless of which metric is used.

Comparison of vestibular evoked myogenic potentials elicited by click and short duration tone burst stimuli

2010 ◽  
Vol 125 (4) ◽  
pp. 343-347 ◽  
Author(s):  
K Kumar ◽  
S Kumar Sinha ◽  
A Kumar Bharti ◽  
A Barman
Keyword(s):  
Short Duration ◽  
Clinical Assessment ◽  
Low Frequency ◽  
Tone Burst ◽  
Normal Hearing ◽  
Vestibular Evoked Myogenic Potentials ◽  
Vestibular Evoked Myogenic Potential ◽  
Acoustic Stimuli ◽  
Myogenic Potential ◽  
Electrical Impulses

AbstractIntroduction:Vestibular evoked myogenic potentials are short latency electrical impulses that are produced in response to higher level acoustic stimuli. They are used clinically to diagnose sacculocollic pathway dysfunction.Aim:This study aimed to compare the vestibular evoked myogenic potential responses elicited by click stimuli and short duration tone burst stimuli, in normal hearing individuals.Method:Seventeen subjects participated. In all subjects, we assessed vestibular evoked myogenic potentials elicited by click and short duration tone burst stimuli.Results and conclusion:The latency of the vestibular evoked myogenic potential responses (i.e. the p13 and n23 peaks) was longer for tone burst stimuli compared with click stimuli. The amplitude of the p13–n23 waveform was greater for tone burst stimuli than click stimuli. Thus, the click stimulus may be preferable for clinical assessment and identification of abnormalities as this stimulus has less variability, while a low frequency tone burst stimulus may be preferable when assessing the presence or absence of vestibular evoked myogenic potential responses.

scholarly journals Vestibular evoked myogenic potential

2014 ◽  
Vol 67 (suppl. 1) ◽  
pp. 38-45
Author(s):  
Slobodanka Lemajic-Komazec ◽  
Zoran Komazec ◽  
Ljiljana Vlaski ◽  
Slobodan Savovic ◽  
Maja Buljcik-Cupic ◽  
...  
Keyword(s):  
Tone Burst ◽  
Acoustic Stimulation ◽  
Vestibular Evoked Myogenic Potentials ◽  
Vestibular Evoked Myogenic Potential ◽  
Average Value ◽  
Myogenic Potential ◽  
The Difference ◽  
Interaural Differences ◽  
The Right ◽  
A Prospective Study

Introduction. Vestibular evoked myogenic potentials are neurophysiological method for examining of saccular function, the bottom of the vestibular nerve that in nervates the sacculus and central vestibular pathways. Those are inhibitory potentials of the sternocleido mastoid musclein response to ipsilateral acoustic stimulation of the sacculus. Parameters of vestibular evoked myogenic potential testing include threshold, latencies of p1 and n1 wave and interamplitude p13-n23, interaural difference of p13 and n23 latency and interaural amplitude difference ratio. The aim of this study was to compire parameters standardization of vestibular evoked myogenic potentials responses, latency p13 and n23 of waves, the amplitude of responses and interaural differences in the amplitude andto determinewhether there is a difference in values between the sexes. Material and methods. This research was meant to be a prospective study which included 30 normal audiovestibular volunteers of both sexes. The group consisted of 53.3% women and 46.7% men. The saccular function testing by vestibular evoked myogenic potentials was performed monoaurally using air-conductive 500 Hz tone burst auditory stimulation. Results. The average value of the p13 wave latency in healthy subjects of this study was 15.18 ms (?1.24) while the mean latency of n23 waves in the same subjects was 25.00 ms (?2.23). The average value of the amplitude of the p13-n23 waves was 80.28 (34. ?04) microvolts. Conclusion. The difference in the values of the basic parameters of vestibular evoked myogenic potential responses between men and women does not exist. No differences between the right and the left ear in the values of latency and amplitude were observed.

Tone burst–galvanic ratio of vestibular evoked myogenic potential amplitudes: A new parameter of vestibular evoked myogenic potential?

2007 ◽  
Vol 118 (8) ◽  
pp. 1685-1690 ◽  
Author(s):  
Toshihisa Murofushi ◽  
Shinichi Iwasaki ◽  
Hidenori Ozeki ◽  
Munetaka Ushio ◽  
Yasuhiro Chihara
Keyword(s):  
Tone Burst ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential

scholarly journals Effects of Age on Dual Task Walking Performance as Measured Using a Smartphone Application in Middle-Aged Adults

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 168-168
Author(s):  
Junhong Zhou ◽  
Gabriele Cattaneo ◽  
Wanting Yu ◽  
Jose Tormos ◽  
Lewis Lipsitz ◽  
...  
Keyword(s):  
Dual Task ◽  
Age Group ◽  
Stride Time ◽  
Brain Health ◽  
Middle Aged ◽  
Single Task ◽  
Age Related ◽  
Walking Performance ◽  
The Mean ◽  
Middle Aged Adults

Abstract After the age of 65, one’s ability to walk while performing an additional cognitive task (i.e., dual-tasking) is predictive of both future falls and cognitive decline. However, while it is well-known that older adults exhibit diminished dual-task performance, the time course of age-related dual-task decline has not been established. We thus conducted an analysis of data collected within the ongoing Barcelona Brain Health Initiative, a prospective population-based study characterizing the determinants of brain health maintenance in middle-aged adults. Cognitively-unimpaired participants (n=655) aged 40-65 years without neuro-psychiatric disease completed laboratory-based trials of walking normally (single-task) and walking while performing a verbalized serial subtraction task (dual-task). A smartphone-based gait assessment application was used to capture data and derive both the mean stride time (ST) and stride time variability (STV, defined as the coefficient of variation about the mean stride time) of each trial. The dual-task costs (DTC) to each gait metric were obtained by calculating the percent change from single- to dual-task conditions. We categorized participants into five groups according to age (e.g. Group 1: 40-45 years; Group 5: 60-65 years). Age group did not have an effect on single-task gait outcomes (p>0.51). However, the oldest age group, as compared to each of the other groups, exhibited greater DTC to both ST and STV (p<0.03). These results indicate that dual-task walking performance in particular may begin to diminish in late middle age even in the absence of detectable cognitive issues, DTC may offer a sensitive metric to age-related change in cognitive function.

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