Variability of registration latency and amplitude of the auditory evoked potential long latency (P3) in the condition test and retest

Author(s)

Ana Cláudia Mirândola Barbosa Reis ^[1] ; Ana Cláudia Figueiredo Frizzo ^[2] ; Aline Cristine Lozano ^[3] ; Francine Raquel dos Santos ^[4] ; Adriana Ribeiro Tavares Anastasio ^[5] ; Miguel Angelo Hyppolito ^[6]

Affiliation

^[1] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço - Brasil

^[2] Universidade Estadual Paulista ?Júlio de Mesquita Filho?. Departamento de Fonoaudiologia - Brasil

^[3] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto - Brasil

^[4] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto - Brasil

^[5] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço - Brasil

^[6] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço - Brasil

• Document type: Journal article
• Source: Audiol., Commun. Res.; v. 19, n. 3, p. 293-298, 2014-09-00.

Abstract

Purpose To analyze the variability of the amplitude and latency of the P3 cognitive potential in normal individuals, the condition test and retest, in the period of 7 days. Methods We evaluated 32 subjects, with ages between 18 and 25 years, 20 females and 12 males, without hearing complaints. Were submitted to audiologic evaluation and cortical potential. Results The mean values of latency and amplitude for the P3 obtained in this study were of 314.78 ms and 312.40 ms for latency and 5.04 μV and 4.58 μV, for amplitude, in positions Cz and Fz, respectively. No significant difference was found when compared to the latency and amplitude, in the test-retest reliability, with the fixing of the electrodes in Cz and Fz. There was no difference for the latency and amplitude of P3 in all the modalities studied: gender, fixation of the electrodes (Cz and Fz) and condition test and retest. For the latency of the P3 in the female gender and condition of test and retest, there was significant difference. Conclusion The mean values of latency and amplitude found in this study were 313.6 ms and 4.81 μV, respectively. The values of latency and amplitude did not vary according to the position of the electrodes (Cz and Fz) and regarding the condition test as retest. There was a significant difference for the female gender when compared in condition test and retest.The mean difference of the latency of P3 in condition of reassessment was 10.50 ms (Fz) and 15.25 ms (Cz) for the female gender and of 6.00 ms (Fz) and 5.83 ms (Cz) for the male gender. (AU)

• FAPESP's process: 12/03995-0 - Variability of the registration latency and amplitude of the auditory evoked potentiallong latency (P300) in the condition test and retest
• Grantee: Aline Cristina Lozano
• Support Opportunities: Scholarships in Brazil - Scientific Initiation