otolaryngology-2019-posters-abstracts

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Otolaryngology 2019

Otolaryngology Online Journal | ISSN: 2250-0359 | Volume 9

July 18-19, 2019 | Valencia, Spain

OF EXCELLENCE

IN INTERNATIONAL

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YEARS

OTOLARYNGOLOGY: ENT SURGERY

Global Summit on

Otolaryngology Online Journal 2019, Volume 9

MISMATCH NEGATIVITY IN CHILDREN

Dulce Azevedo Ferreira, Claudine Devicari Bueno, Sady Selaimen da Costa

and

Pricila Sleifer

Universidade Federal do Rio Grande do Sul, Brazil

he Mismatch Negativity (MMN) evaluation is a promising procedure to assess objectively the ability of audi-

tory discrimination. The objective was to characterize the latency and amplitude values of MMN in children

with normal auditory thresholds. Children between 5 and 11 years old participated in the present study. All

participants underwent acoustic immittance measurements and tonal and vocal audiometry. The MMN was

recorded with the MASBE ATC Plus system (Contronic, Pelotas, RS and Brazil). The frequent stimulus was 1,000

Hz and the rare stimulus was 2,000 Hz in 80 dBHL. The stimuli were presented in both ears separately. Results

for the female group are the mean latencies and amplitude of MMN were177.3ms and 5.01μV in the right ear

(RE) and 182.4ms and 5.39μV in the left ear (LE). In the male group, the mean latencies were 194.4ms in the RE

and 183.6ms in the LE, with an amplitude of 5.11μV in the RE and 5.83μV in the LE. There was no statistically

significant difference between ears (p= 0.867 latency and p= 0.178 - amplitude), age (p > 0.20) and the gender

of the participants (p > 0.05). The findings are known in national and international literature.