Variables in P300 recording: task type and electrode position
CoDAS
;
28(4): 355-361, jul.-ago. 2016. tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-795250
ABSTRACT
ABSTRACT Purpose To analyze the latency and amplitude of P300 responses obtained with electrodes positioned at Cz and Fz and in different tasks of infrequent stimulus identification in normal hearing individuals. Methods Forty adults of both genders participated in the study. Three recordings with three different tasks were obtained for the identification of the infrequent stimulus; simultaneous recordings were obtained from Cz and Fz positions. Results Cz position showed significantly greater amplitudes and lower latencies than Fz. Regarding the three tasks, only “pronouncing the word ’thin’” was different from “raising a finger”, with lowest latencies for the verbal task. Regarding amplitude, significantly higher values were observed for “raising a finger”, followed by “pronouncing the word ‘thin’” and mental counting. Conclusion Cz obtained the best values, highest amplitude and lowest latency. Lowest latencies were obtained for the task of “pronouncing the word ‘thin’” and the highest amplitudes were obtained for “raising a finger”.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Estimulación Acústica
/
Potenciales Relacionados con Evento P300
/
Electrodos
/
Electrofisiología
/
Potenciales Evocados Auditivos
/
Audición
Tipo de estudio:
Estudio pronóstico
Límite:
Adolescente
/
Adulto
/
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
CoDAS
Asunto de la revista:
Audiología
/
Patología del Habla y Lenguaje
Año:
2016
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade de São Paulo/BR
Similares
MEDLINE
...
LILACS
LIS