SHORT-TERM REPEATABILITY OF CONTRALATERAL SUPPRESSION OF TRANSIENTLY EVOKED OTOACOUSTIC EMISSIONS: PRELIMINARY RESULTS

Purpose The objective of the current study was to investigate the short-term test–retest reliability of contralateral suppression (CS) of click-evoked otoacoustic emissions (CEOAEs) using commercially available otoacoustic emission equipment. Method Twenty-three young normal-hearing subjects were tested. An otoscopic evaluation, admittance measures, pure-tone audiometry, measurements of CEOAEs without and with contralateral acoustic stimulation (CAS) to determine CS were performed at baseline ( n = 23), an immediate retest without and with refitting of the probe (only CS of CEOAEs; n = 11), and a retest after 1 week ( n = 23) were performed. Test–retest reliability parameters were determined on CEOAE response amplitudes without and with CAS, and on raw and normalized CS indices between baseline and the other test moments. Results Repeated-measures analysis of variance indicated no random or systematic changes in CEOAE response amplitudes without and with CAS, and in raw and normalized CS indices between the test moments. Moderate-to-high intraclass correlation coefficients with mostly high significant between-subjects variability between baseline and each consecutive test moment were found for CEOAE response amplitude without and with CAS, and for the raw and normalized CS indices. Other reliability parameters deteriorated between CEOAE response amplitudes with CAS as compared to without CAS, between baseline and retest with probe refitting, and after 1 week, as well as for frequency-specific raw and normalized CS indices as compared to global CS indices. Conclusions There was considerable variability in raw and normalized CS indices as measured using CEOAEs with CAS using commercially available otoacoustic emission equipment. More research is needed to optimize the measurement of CS of CEOAEs and to reduce influencing factors, as well as to make generalization of test–retest reliability data possible.

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Contralateral suppression of transiently evoked otoacoustic emissions and tinnitus

British Journal of Audiology ◽

10.3109/03005369409086575 ◽

1994 ◽

Vol 28 (4-5) ◽

pp. 255-266 ◽

Cited By ~ 24

Author(s):

S. Chéry-croze ◽

E. Truy ◽

A. Morgon

Keyword(s):

Otoacoustic Emissions ◽

Contralateral Suppression ◽

Transiently Evoked Otoacoustic Emissions

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Absence of contralateral suppression of transiently evoked otoacoustic emissions in fibromyalgia syndrome

The Journal of Laryngology & Otology ◽

10.1017/s0022215107001569 ◽

2008 ◽

Vol 122 (10) ◽

pp. 1047-1051 ◽

Cited By ~ 11

Author(s):

B Gunduz ◽

Y A Bayazit ◽

F Celenk ◽

C Sarıdoğan ◽

A G Guclu ◽

...

Keyword(s):

Otoacoustic Emissions ◽

Pure Tone ◽

Fibromyalgia Syndrome ◽

Pure Tone Audiometry ◽

Otoacoustic Emission ◽

Normal Hearing ◽

Superior Olivary Complex ◽

Contralateral Suppression ◽

The Mean ◽

Transiently Evoked Otoacoustic Emissions

AbstractObjective:To assess contralateral suppression of transiently evoked otoacoustic emissions in patients with fibromyalgia syndrome and normal hearing.Methods:Twenty-four female patients with fibromyalgia syndrome and 24 healthy female controls with normal hearing were assessed using pure tone audiometry and transiently evoked otoacoustic emissions.Results:All patients with fibromyalgia syndrome and all controls had normal hearing on pure tone audiometry. In the patients with fibromyalgia syndrome, the mean transiently evoked otoacoustic emission amplitude was 15.5 ± 4.8 dB. The mean transiently evoked otoacoustic emission amplitudes after contralateral suppression was 15.5 ± 4.9 dB. There was no statistically significant difference between the transiently evoked otoacoustic emission amplitudes measured before and after contralateral suppression (p > 0.05). In the controls, the mean transiently evoked otoacoustic emission amplitude was 12 ± 5 dB. The mean transiently evoked otoacoustic emission amplitudes after contralateral suppression was 11 ± 4.7 dB. There was a statistically significant decrease in transiently evoked otoacoustic emission amplitudes after contralateral suppression (p < 0.01).Conclusion:The mechanisms related to contralateral suppression of transiently evoked otoacoustic emissions seem dysfunctional in fibromyalgia syndrome. This dysfunction may be at the brain stem level, where the medial superior olivary complex is located, or at the synapses of medial superior olivary complex fibres with the outer hair cells in the cochlea. Demonstration of lack of contralateral suppression of transiently evoked otoacoustic emissions can be used as a diagnostic tool in patients with fibromyalgia syndrome.

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