Abstract
Purpose Evaluate the auditory pathway at the brainstem and cortical levels in individuals with peripheral vestibular dysfunction. Methods The study sample was composed 19 individuals aged 20-80 years that presented exam results suggestive of Peripheral Vestibular Disorder (PVD) or Vestibular Dysfunction (VD). Participants underwent evaluation of the auditory pathway through Brainstem Auditory Evoked Potentials (BAEP) (short latency) and P1, N1, P2, N2, and P300 cortical potentials (long latency). Results Nine individuals presented diagnosis of VD and 10 participants were diagnosed with PVD. The overall average of the long latency potentials of the participants was within the normal range, whereas an increased mean was observed in the short latency of waves III and V of the left ear, as well as in the I - III interpeak interval of both ears. Association of the auditory potentials with VD and PVD showed statistically significant correlation only in the III - V interpeak interval of the right ear for short latency. Comparison between the long and short latencies in the groups showed differences between VD and PVD, but without statistical significance. Conclusion No statistically significant correlation was observed between VD/PVD and the auditory evoked potentials; however, for the long latency potentials, individuals with VD presented higher latency in P1, N1, P2, and N2, where as participants with PVD showed higher latency in P300. In the short latency potentials, there was an increase in the absolute latencies in the VD group and in the interpeak intervals in the PVD group.
Highlights
Balance and hearing are two of the main vital skills for humans
Vector electronystagmography (VENG) is one of the most widely used methods to diagnose balance alterations and, help in the diagnosis of labyrinth changes[3]. This evaluation may reveal Vestibular Dysfunction (VD), in cases in which the caloric test presents a result of hyperreflexia or directional preponderance of nystagmus, or Peripheral Vestibular Deficiency Deficiency (PFVV), in cases in which the caloric test presents a result of hyporeflexia, areflexia or labyrinthine preponderance[4]
For the classification in Peripheral Vestibular Disorder (PVD), we considered those in which the caloric test presented a result of hyporeflexia, areflexia or labyrinthine preponderance, according to Mor and Fragoso criteria[4]
Summary
Balance and hearing are two of the main vital skills for humans. They play fundamental roles in people’s relationship with the environment. Vector electronystagmography (VENG) is one of the most widely used methods to diagnose balance alterations and, help in the diagnosis of labyrinth changes[3]. This evaluation may reveal Vestibular Dysfunction (VD), in cases in which the caloric test presents a result of hyperreflexia or directional preponderance of nystagmus, or Peripheral Vestibular Deficiency Deficiency (PFVV), in cases in which the caloric test presents a result of hyporeflexia, areflexia or labyrinthine preponderance[4]
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