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Comodulation Masking Release in Tinnitus Frequency and One Lower Octave of Tinnitus Frequency - PubMed

Comodulation Masking Release in Tinnitus Frequency and One Lower Octave of Tinnitus Frequency

Leila Faraji et al. Indian J Otolaryngol Head Neck Surg. 2023 Apr.

Abstract

Inhibitory function is the basis of many perceptual and non-perceptual abilities in the auditory system. In people with tinnitus, decreased inhibitory function in the central auditory system has been proven. This disorder is caused by an increase in neural activity caused by an imbalance between stimulation and inhibition. The aim of this study was to evaluate and compare inhibitory function in persons who had tinnitus, at and one octave lower than the tinnitus frequency. Studies show that inhibition has very important role in comodulation masking release. According to inhibitory dysfunction in people with tinnitus, in this study we assessed comodulation masking release in tinnitus frequency and one lower octave. Participants were divided into two groups. Group 1 consisted of 7 individuals with unilateral tonal tinnitus at 4 kHz and group 2 included 7 individuals with unilateral tonal tinnitus at 6 kHz. Paired test, in each group separately, showed that the comodulation masking release and Across Frequency comodulation masking release differed significantly between tinnitus frequency and one octave lower in each group (p < 0.05). In fact, the disinhibition in the area around the frequency of the tinnitus seems to be greater than the tinnitus frequency area. It seems that the results of CMRs can be used in planning and managing the treatment of people with tinnitus (such as sound therapy, etc.).

Keywords: Comodulation masking release (CMR); Inhibition; Tinnitus.

© Association of Otolaryngologists of India 2023, Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

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Conflict of interest statement

Conflict of interestBy their signature, all authors affirm that there is no actual or potential conflict of interest including any financial, personal or other relationships with other people or organizations within three years of beginning the submitted work that could inappropriately influence, or be perceived to influence, their work. If case such conflicts of interest exist, a disclosure document is signed by concerned authors.

Figures

Fig. 1
Fig. 1

Flanker arrangement

Fig. 2
Fig. 2

The average psychoacoustic thresholds of signal for unmodulated (UM), comodulated (CM) maskers, on-frequency masker only (Reference-RF) and comodulation masking release (CMR & AF-CMR) value in participants

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