Verification of the Mismatch Negativity (MMN) responses in normal adult subjects.
Mismatch Negativity (MMN) is used to evaluate the central auditory system.


OBJECTIVE
to characterize the MMN, in normal subjects.


METHODS
prospective study, 12 subjects, six males and six females, between the ages of 18 and 24. "Mann-Whytnei" test. EXAMS: Pure Tone Audiometry (PTA), Tympanometry, Otoacoustic Emissions and Short and Long Latency Auditory Potentials (MMN).


RESULTS
in MMN variable amplitude, the mean value was of -2.757 microV and -3.548 microV, CZA1 and CZA2; of 1.435 microV and -1.867 microV, CZA1 and CZA2. In variable and medium latency, we found in 150.7ms and 153.2ms, CZA1 and CZA2; in 170.4ms and 184.0ms, CZA1 and CZA2 - for females and males respectively.


CONCLUSIONS
related to latency, there was significant statistical difference between the genders in relation to CZA1 and CZA2; and it was lower for females and higher for males.
Bortoleto Brossi
Adriana
A
Speech and Hearing Therapist.
Cristina Borba
Karen
K
Speech and Hearing Therapist.
Dutra Garcia
Cristiane Fregonesi
CF
M.S in Public Health - USP; PhD - Department of Otorhinolaryngology, Ophthalmology, Head and Neck Surgery - Medical School of Ribeirão Preto/SP-USP, Professor of Speech and Hearing Therapy - Franca - Unifran.
Mirândola Barbosa Reis
Ana Cláudia
AC
PhD in Human Communication Disorders - UNIFESP/EPM, Professor of Speech and Hearing Therapy - Universidade de Franca - Unifran.
Lima Isaac
Myriam de
M
PhD of Pediatrics - Medical School of Ribeirão Preto/SP - University of São Paulo, USP., ENT. Professor of Otorhinolaryngology - Department of Otorhinolaryngology, Ophthalmology and Head and Neck Surgery - Ribeirão Preto Medical School/SP -USP; Curso de Fonoaudiologia - Universidade de Franca Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço da Faculdade de Medicina de Ribeirão Preto/SP - USP.
D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D001307:Auditory Perception / Q000502:physiology*; D003430:Cross-Sectional Studies; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*; D011446:Prospective Studies; D012737:Sex Factors