Standardization of Electrophysiological Responses to the P300 in Normal Hearing Adults

Abstract

The P300, the record of an auditory evoked potential of long latency, is triggered when the individual is with the attention focused on a mental activity, to assess the integrity of central auditory pathways. The purpose of this study was to standardize the electrophysiological responses obtained through the application of P300 at the Center for Hearing Health Clelia Spinato Manfro. Thirty-three adult subjects aged between 19 and 49 years, of both sexes, with hearing within normal limits participated. The results showed that most subjects were between 18 and 25(51.5%), female (78.8%) and were enrolled in higher education (66.7%), with minimum latency of 246ms and 361ms maximum. As for the variable gender values of P300 latency were higher for male subjects, in terms of age it was found that with increasing age of the subjects the values for P300 latency increases. We conclude that for the age group from 18 to 49 years old, the absolute latency of P300 ranged from 246ms to 361 ms, being higher on male with associated metabolic diseases and increasing significantly due to age.