Acoustic Reflex Latency (ARL) Assessment in Malaysian Adults: The Effects of Age, Gender and Stimulus Frequency

2019 ◽  
Vol 17 (2) ◽  
Author(s):  
Mahamad Almyzan Awang ◽  
Nurliyana Nasuha Zamri ◽  
Maziah Romli ◽  
Rosdan Salim ◽  
Mohd Normani Zakaria
Keyword(s):  
Stimulus Frequency ◽  
Acoustic Reflex ◽  
Reflex Latency

The influences of stimulation mode and stimulus frequency on acoustic reflex latency (ARL) among young adults

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahamad Almyzan Awang ◽  
Nurliyana Nasuha Zamri ◽  
Wan Najibah Wan Mohamad ◽  
Mohd Normani Zakaria
Keyword(s):  
Young Adults ◽  
Analysis Of Variance ◽  
Normative Data ◽  
Large Scale ◽  
Stimulus Frequency ◽  
Future Research ◽  
Clinical Test ◽  
Acoustic Reflex ◽  
Stimulation Mode ◽  
Reflex Latency

Abstract Introduction Acoustic reflex (AR) is a valuable clinical test for hearing diagnosis. Parameters of AR such as its amplitude and threshold have been commonly reported in research. Acoustic reflex latency (ARL) has not been widely studied and more research is warranted to determine its basic properties and clinical usefulness. The present study aimed to determine the influences of stimulation mode and stimulus frequency on ARL. Methods In this study, 52 healthy young adults were enrolled (mean age = 23.2 ± 0.8 years, 61.8% were males). They underwent the standard AR testing and ARL values were computed. Both ipsilateral and contralateral recordings were made at 500, 1000, 2000 and 4000 Hz frequencies. Results The ARL values obtained are consistent with the findings from the previous studies. Two-way analysis of variance (ANOVA) revealed that the ARL values were not statistically influenced by either stimulation mode (p = 0.061) or stimulus frequency (p = 0.598). Conclusion Among young adults, ARL does not appear to be influenced by stimulation mode and stimulus frequency. Further large scale research is warranted to support the present study’s findings. The preliminary normative data for ARL obtained in this study can serve as the reference for future research involving this particular population.

scholarly journals The acoustic reflex latency in the aging ear

1982 ◽  
Vol 71 (S1) ◽  
pp. S108-S108
Author(s):  
Scott W. Spence ◽  
Dennis Kisiel ◽  
Hugh Catts
Keyword(s):  
Acoustic Reflex ◽  
Reflex Latency

Acoustic-Reflex Latency: State of the Art

1984 ◽  
pp. 301-328 ◽  
Author(s):  
ANDREA BOSATRA ◽  
MARIO RUSSOLO ◽  
CAROL ANN SILVERMAN
Keyword(s):  
State Of The Art ◽  
Acoustic Reflex ◽  
Reflex Latency

THE ACOUSTIC REFLEX LATENCY TEST

1980 ◽  
Vol 90 (4) ◽  
pp. 601???611 ◽  
Author(s):  
JACK D. CLEMIS ◽  
CYNTHIA N. SARNO
Keyword(s):  
Acoustic Reflex ◽  
Reflex Latency

scholarly journals Frequency tuning of medial-olivocochlear-efferent acoustic reflexes in humans as functions of probe frequency

2012 ◽  
Vol 107 (6) ◽  
pp. 1598-1611 ◽  
Author(s):  
Watjana Lilaonitkul ◽  
John J. Guinan
Keyword(s):  
Otoacoustic Emissions ◽  
Frequency Tuning ◽  
Stimulus Frequency ◽  
Phase Changes ◽  
Acoustic Reflex ◽  
Wide Range ◽  
Acoustic Reflexes ◽  
Specific Feedback ◽  
Stimulus Frequency Otoacoustic Emissions ◽  
Medial Olivocochlear

The medial-olivocochlear (MOC) acoustic reflex is thought to provide frequency-specific feedback that adjusts the gain of cochlear amplification, but little is known about how frequency specific the reflex actually is. We measured human MOC tuning through changes in stimulus frequency otoacoustic emissions (SFOAEs) from 40-dB-SPL tones at probe frequencies ( fps) near 0.5, 1.0, and 4.0 kHz. MOC activity was elicited by 60-dB-SPL ipsilateral, contralateral, or bilateral tones or half-octave noise bands, with elicitor frequency ( fe) varied in half-octave steps. Tone and noise elicitors produced similar results. At all probe frequencies, SFOAE changes were produced by a wide range of elicitor frequencies with elicitor frequencies near 0.7–2.0 kHz being particularly effective. MOC-induced changes in SFOAE magnitude and SFOAE phase were surprisingly different functions of fe: magnitude inhibition largest for fe close to fp, phase change largest for fe remote from fp. The metric ΔSFOAE, which combines both magnitude and phase changes, provided the best match to reported (cat) MOC neural inhibition. Ipsilateral and contralateral MOC reflexes often showed dramatic differences in plots of MOC effect vs. elicitor frequency, indicating that the contralateral reflex does not give an accurate picture of ipsilateral-reflex properties. These differences in MOC effects appear to imply that ipsilateral and contralateral reflexes have different actions in the cochlea. The implication of these results for MOC function, cochlear mechanics, and the production of SFOAEs are discussed.

Acoustic Reflex Latency Test in the Evaluation of Nontumor Patients with Abnormal Brainstem Latencies

1980 ◽  
Vol 89 (4) ◽  
pp. 296-302 ◽  
Author(s):  
Jack D. Clemis ◽  
Cynthia N. Sarno
Keyword(s):  
False Positive ◽  
Digital Signal ◽  
Normative Values ◽  
Control Group ◽  
Electric Response ◽  
Conduction Time ◽  
Test Results ◽  
Acoustic Reflex ◽  
Indirect Measure ◽  
Reflex Latency

The acoustic reflex latency test (ARLT), an indirect measure of neural conduction time utilizing the electroimpedance method, was used to evaluate 43 highly suspect, nontumor patients who demonstrated abnormal latency results on brainstem electric response audiometry (BERA), false-positive for tumor. Normative values and criteria for tumor-positive ARLT results were established on a control group using a second generation test unit, comprised of dual impedance bridges and a digital signal averager, designed especially to perform the ARLT. When cut-off criteria for both absolute reflex latency and interaural latency difference (ILD) values were applied to this BERA false positive population, the ARLT correctly identified 93% of patients as having end-organ lesions. Differences in ARLT and BERA test results are attributed to differences in 1) method of measurement, 2) characteristics of the eliciting signal, and 3) generation of the response. These factors are discussed as sources of variability. Both ARLT and BERA are recommended as tandem procedures when screening for acoustic or angle tumors.

scholarly journals Quantification of the acoustic reflex latency parameters in humans

1977 ◽  
Vol 62 (S1) ◽  
pp. S13-S13 ◽  
Author(s):  
David L. McPherson ◽  
D. Thompson
Keyword(s):  
Acoustic Reflex ◽  
Reflex Latency

Comparison of results of auditory brain stem response and acoustic reflex latency in acoustic tumor diagnosis

1983 ◽  
Vol 91 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Charles A. Mangham ◽  
Patricia A. Burnett ◽  
Roger C. Lindeman
Keyword(s):  
Brain Stem ◽  
Cerebellopontine Angle ◽  
Tumor Diagnosis ◽  
Reflex Response ◽  
Acoustic Reflex ◽  
Auditory Brain Stem Response ◽  
Reflex Latency ◽  
Auditory Brain Stem ◽  
Acoustic Tumor ◽  
Brain Stem Response

Persons with cerebellopontine angle tumors often have an increase in the latency of the acoustic reflex response that is comparable to the auditory brain stem response (ABR) in its sensitivity. However, reflex latency is less specific, since it may be prolonged in patients with Meniere's disease.

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