Abstract
Objective
In recent studies, cochlear synaptopathy has been suggested as a potential pathophysiology mechanism for tinnitus, which occurs in individuals with normal hearing thresholds. Auditory Brainstem Response (ABR) is a noninvasive method frequently used in the literature to evaluate cochlear synaptopathy in tinnitus patients. However, possible factors such as high-frequency pure-tone hearing thresholds, age, gender, and head characteristics that may affect ABR were not considered sufficiently in previous studies. Therefore, the present study aims to evaluate tinnitus ears and non-tinnitus ears with ABR in unilateral chronic tinnitus patients with symmetrical hearing.
Methods
Twenty unilateral chronic tinnitus patients having normal pure-tone average with symmetrical hearing thresholds was included in the study. Subjects were evaluated with 0.25–16 kHz pure-tone audiometry, Tinnitus Handicap Inventory (THI) and ABR were administered. All ears were evaluated monaurally using click stimuli at 80 dB nHL, alternating polarity (21.1 rate/s, 2000 sweeps).
Results
Wave I amplitude of the ABR and the ratio of III/I, V/I, and V/III wave amplitudes from tinnitus ears was higher than non-tinnitus ears. At the same time, there was a positive correlation between THI and V–I and V–III interpeak latency range, and a negative correlation between V/III wave amplitude ratio.
Conclusion
ABR can be used as an evaluation method to provide evidence that the neural organizations of individuals with chronic tinnitus differ in certain regions in their auditory pathways. The correlation between THI and ABR findings suggests that there may be a connection between tinnitus distress and the neural organization of the auditory system.
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References
Axelsson A, Ringdahl A (1989) Tinnitus—a study of its prevalence and characteristics. Br J Audiol 23(1):53–62
Xu X et al (2011) An epidemiologic study of tinnitus in a population in Jiangsu Province, China. J Am Acad Audiol 22(9):578–585
Park SY et al (2017) Comparison of tinnitus and psychological aspects between the younger and older adult patients with tinnitus. Auris Nasus Larynx 44(2):147–151
Sanchez TG et al (2005) Tinnitus in normally hearing patients: clinical aspects and repercussions. Braz J Otorhinolaryngol 71(4):427–431
Savastano M (2008) Tinnitus with or without hearing loss: are its characteristics different? Eur Arch Otorhinolaryngol 265(11):1295–1300
Liberman MC, Kujawa SG (2017) Cochlear synaptopathy in acquired sensorineural hearing loss: manifestations and mechanisms. Hear Res 349:138–147
Kujawa SG, Liberman MC (2009) Adding insult to injury: cochlear nerve degeneration after “temporary” noise-induced hearing loss. J Neurosci 29(45):14077–14085
Valero M et al (2017) Noise-induced cochlear synaptopathy in rhesus monkeys (Macaca mulatta). Hear Res 353:213–223
Liberman MC et al (2016) Toward a differential diagnosis of hidden hearing loss in humans. PLoS ONE 11(9):e0162726
Bharadwaj HM et al (2019) Non-invasive assays of cochlear synaptopathy–candidates and considerations. Neuroscience 407:53–66
Mehraei G et al (2016) Auditory brainstem response latency in noise as a marker of cochlear synaptopathy. J Neurosci 36(13):3755–3764
Furman AC, Kujawa SG, Liberman MC (2013) Noise-induced cochlear neuropathy is selective for fibers with low spontaneous rates. J Neurophysiol 110(3):577–586
Kujawa SG, Liberman MC (2015) Synaptopathy in the noise-exposed and aging cochlea: primary neural degeneration in acquired sensorineural hearing loss. Hear Res 330:191–199
Guest H et al (2017) Tinnitus with a normal audiogram: relation to noise exposure but no evidence for cochlear synaptopathy. Hear Res 344:265–274
Roberts LE et al (2010) Ringing ears: the neuroscience of tinnitus. J Neurosci 30(45):14972–14979
Wojtczak M, Beim JA, Oxenham AJ (2017) Weak middle-ear-muscle reflex in humans with noise-induced tinnitus and normal hearing may reflect cochlear synaptopathy. eNeuro 4(6):0363–0417
Park E et al (2021) Evidence of cochlear synaptopathy and the effect of systemic steroid in acute idiopathic tinnitus with normal hearing. Otol Neurotol 42:978–984
Bramhall NF, Konrad-Martin D, McMillan GP (2018) Tinnitus and auditory perception after a history of noise exposure: relationship to auditory brainstem response measures. Ear Hear 39(5):881
Han MS et al (2021) Auditory brainstem response test results in normal hearing adolescents with subjective tinnitus. Int J Pediatr Otorhinolaryngol 146:110775
Don M, Eggermont J (1978) Analysis of the click-evoked brainstem potentials in man using high-pass noise masking. J Acoust Society Am 63(4):1084–1092
Guest H, Munro KJ, Plack CJ (2017) Tinnitus with a normal audiogram: role of high-frequency sensitivity and reanalysis of brainstem-response measures to avoid audiometric over-matching. Hear Res 356:116
Barnea G et al (1990) Tinnitus with normal hearing sensitivity: extended high-frequency audiometry and auditory-nerve brain-stem-evoked responses. Audiol 29(1):36–45
Gilles A et al (2016) Decreased speech-in-noise understanding in young adults with tinnitus. Front Neurosci 10:288
Jerger J, Hall J (1980) Effects of age and sex on auditory brainstem response. Arch Otolaryngol 106(7):387–391
Lauter JL, Loomis RL (1988) Individual differences in auditory electric responses: comparisons of between-subject and within-subject variability. II. amplitude of brainstem vertex-positive peaks. Scand Audiol 17(2):87–92
Watson DR (1996) The effects of cochlear hearing loss, age and sex on the auditory brainstem response. Audiology 35(5):246–258
Shim HJ et al (2021) Within-subject comparisons of the auditory brainstem response and uncomfortable loudness levels in ears with and without tinnitus in unilateral tinnitus subjects with normal audiograms. Otol Neurotol 42(1):10–17
Aksoy S, Firat Y, Alpar R (2007) The tinnitus handicap inventory: a study of validity and reliability. Int Tinnitus J 13(2):94–98
Newman CW, Jacobson GP, Spitzer JB (1996) Development of the tinnitus handicap inventory. Arch Otolaryngol Head Neck Surg 122(2):143–148
Kehrle HM et al (2016) Tinnitus annoyance in normal-hearing individuals: correlation with depression and anxiety. Ann Otol Rhinol Laryngol 125(3):185–194
Nemati S et al (2014) Cochlear and brainstem audiologic findings in normal hearing tinnitus subjects in comparison with non-tinnitus control group. Acta Med Iran 52(11):822–826
Schaette R, McAlpine D (2011) Tinnitus with a normal audiogram: physiological evidence for hidden hearing loss and computational model. J Neurosci 31(38):13452–13457
Le Prell CG et al (2003) Disruption of lateral efferent pathways: functional changes in auditory evoked responses. J Assoc Res Otolaryngol 4(2):276–290
Sahley TL, Nodar RH (2001) A biochemical model of peripheral tinnitus. Hear Res 152(1–2):43–54
Møller AR, Jannetta PJ (1981) Compound action potentials recorded intracranially from the auditory nerve in man. Exp Neurol 74(3):862–874
Moore JK (1987) The human auditory brain stem as a generator of auditory evoked potentials. Hear Res 29(1):33–43
Brozoski TJ, Bauer CA, Caspary DM (2002) Elevated fusiform cell activity in the dorsal cochlear nucleus of chinchillas with psychophysical evidence of tinnitus. J Neurosci 22(6):2383–2390
Gu J et al (2012) Brainstem auditory evoked potentials suggest a role for the ventral cochlear nucleus in tinnitus. J Assoc Res Otolaryngol 13:819–833
Boettcher FA, Salvi RJ (1993) Functional changes in the ventral cochlear nucleus following acute acoustic overstimulation. J Acoust Soc Am 94(4):2123–2134
Kaltenbach JA et al (2004) Activity in the dorsal cochlear nucleus of hamsters previously tested for tinnitus following intense tone exposure. Neurosci Lett 355(1–2):121–125
Engineer ND et al (2011) Reversing pathological neural activity using targeted plasticity. Nature 470(7332):101–104
Delb W et al (2008) Alterations in event related potentials (erp) associated with tinnitus distress and attention. Appl Psychophysiol Biofeedback 33(4):211–221
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Ethical approval for this study was obtained from Non-Interventional Clinical Research Ethics Committee (GO21/522) and completed in conformity with the standards set by the Declaration of Helsinki.
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Sendesen, E., Kaynakoglu, B., Veziroglu, L.B. et al. Auditory brainstem response in unilateral tinnitus patients: does symmetrical hearing thresholds and within-subject comparison affect responses?. Eur Arch Otorhinolaryngol 279, 4687–4693 (2022). https://doi.org/10.1007/s00405-021-07232-3
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DOI: https://doi.org/10.1007/s00405-021-07232-3