P300-long-latency auditory evoked potential in normal hearing subjects: simultaneous recording value in Fz and Cz.
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.


OBJECTIVE
To analyze the P300 Long Latency Auditory Evoked Potential obtained through the use of two active electrodes positioned on Fz and Cz.


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.


CONCLUSIONS
Fz and Cz active electrodes positioning can be considered one more resource to help in the P300 clinical analysis.
Duarte
Josilene Luciene
JL
Speech and Hearing Therapy - Faculdade de Odontologia de Bauru - FOB.
Alvarenga
Kátia de Freitas
Kde F
Banhara
Marcos Roberto
MR
Melo
Ana Dolores Passarelli de
AD
Sás
Roberta Moreno
RM
Costa Filho
Orozimbo Alves
OA
D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D003071:Cognition / Q000502:physiology*; D004566:Electrodes; D004594:Electrophysiology / Q000295:instrumentation / Q000379:methods*; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006309:Hearing / Q000502:physiology*; D006801:Humans; D008297:Male; D055815:Young Adult