SciELO - Scientific Electronic Library Online

vol.75 issue2Facial paralysis associated with acute otitis mediaNewborn hearing screening program implantation analysis at a university hospital author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista Brasileira de Otorrinolaringologia

Print version ISSN 0034-7299


DUARTE, Josilene Luciene et al. P300-long-latency auditory evoked potential in normal hearing subjects: simultaneous recording value in Fz and Cz. Rev. Bras. Otorrinolaringol. [online]. 2009, vol.75, n.2, pp.231-236. ISSN 0034-7299.

The P300 is and auditory Evoked Potential, called endogenous potential because it reflects the functional use the individual makes of the auditory stimulus, being highly dependent on cognitive skills; among them we list attention and auditory discrimination. It is a procedure of objective evaluation; however, one that depends on the examiner's experience to detect wave peaks, and it is important to use recording methods that facilitate the response presence analysis and result interpretation. AIM: to analyze the P300 Long Latency Auditory Evoked Potential obtained through the use of two active electrodes positioned on Fz and Cz. MATERIALS AND METHODS: 330 individuals from both genders and age ranging between 7 and 34 years participated in this study, they all had normal hearing and did not have any risk factor for mental problems. RESULTS: Results show that there was no statistically significant difference for N2 and P3 latency and P3 amplitude as far as gender is concerned, nor correlation with the individual's age. There was a strong correlation of these measures with Fz and Cz electrode positioning. CONCLUSION: Fz and Cz active electrodes positioning can be considered one more resource to help in the P300 clinical analysis.

Keywords : cognition; auditory evoked potentials; p300 evoked potential.

        · abstract in Portuguese     · text in English | Portuguese     · English ( pdf epdf ) | Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License