Variables in P300 recording: task type and electrode position
CoDAS
;
28(4): 355-361, jul.-ago. 2016. tab, graf
Article
Dans Anglais
| 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”.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Stimulation acoustique
/
Potentiels évoqués cognitifs P300
/
Électrodes
/
Électrophysiologie
/
Potentiels évoqués auditifs
/
Ouïe
Type d'étude:
Étude pronostique
Limites du sujet:
Adolescent
/
Adulte
/
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
CoDAS
Thème du journal:
Audiologie
/
Orthophonie
Année:
2016
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Universidade de São Paulo/BR
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