Caracterização da normalidade do P300 em adultos jovens Standard characterization of P300 in young adults

ABSTRACT Purpose: To compare the values of latency and amplitude of P300 of healthy Brazilian young adults with the data available on the literature, in order to establish a normative standard for future studies. In addition, the aim was also to verify if the values found in the sample were correlated to gender, situation proposed in the methodology of the examination, and phase of menstrual cycle. Methods: The sample consisted of 22 healthy individuals, without any attention complaints, neurological or auditory disorders, and with ages ranging from 18 to 30 years. All subjects carried out basic audiological evaluation in order to exclude those with hearing loss. The P300 test was carried out in a quiet room, using the two channels equipment AMPLAID MK22. Results: The latency values obtained in the sample, after compared with the literature reference, were in accordance with the latency intervals between 220 e 380 ms. Only amplitude values were influenced by gender and phase of the menstrual cycle.