Abstract
SummaryLong latency auditory evoked potentials (LLAEP) alterations in individuals with tinnitus are suggestive of dysfunction in the central auditory pathways at a cortical level.Aimto characterize the LLAEP in individuals with and without tinnitus exposed to occupational noise.MethodCross-sectional contemporary cohort, prospective study. Sixty subjects exposed to occupational noise, ranging in age from 29 to 50 years underwent LLAEP assessment; 30 of them had tinnitus complaint and 30 did not have tinnitus.Resultswe observed significant statistical difference regarding the mean values of latencies of waves N1 (p<0.001), P2 (p=0.002) and P300 (p=0.039) when we compared individuals with and without tinnitus. In individuals with tinnitus we also noticed a greater number of altered results concerning components N1 (60%) and P2 (66.7%), although only component P2 presented significant statistical difference (p=0.010). For the LLAEP, the latency increase was the only type of alteration found (p=1.000). We found a greater association between bilateral tinnitus and bilateral alteration for all components N1(73%), P2(73%) and P300(50%).ConclusionIt is relevant to study LLAEP in individuals with tinnitus exposed to high occupational sound pressure levels.
Highlights
Some people experience a sound sensation which is not related to any external source of stimulation or noise
The goals of the present study were to characterize the results from long latency auditory evoked potentials (LLAEP), comparing the results obtained from these potentials from individuals with and without tinnitus, and to check the existence of association between the side with LLAEP alteration and the tinnitus location in individuals complaining of tinnitus exposed to high sound pressure levels in their jobs
The material from the present study was based on the results from the basic audiological evaluation and the Long Latency Auditory Evoked Potentials from 60 individuals exposed to occupational noise with high sound pressure levels, both from males and females, in the age range between 27 and 50 years of age, 30 with tinnitus and 30 without tinnitus
Summary
Some people experience a sound sensation which is not related to any external source of stimulation or noise. This auditory phenomenon, defined by the hearing of sounds on one or on both ears, as well as in one’s head is known as tinnitus. These people perceive tinnitus so strongly that they have impairments in their quality of life, which could impact their work, sleep and communication. Present in the lives of people for almost five thousand years, this complaint, especially subjective, remains obscure in many of its aspects, especially regarding its origin[1]
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