Cortical potentials during gap and non-gap paradigms using manual responses in humans.
An experiment was conducted on naive human subjects to measure the time benefits on finger reaction times produced by the offset of a central fixation point 200 ms before the appearance of a target stimulus in the periphery. Subjects produced a shift advancement of manual reaction times. Simultaneously, the event-related potentials were recorded. The gap paradigm induced offset visual evoked potentials and a frontal negativity, it also induced a higher P300 than the non-gap condition. The results suggest that the gap promotes the speeding of the response by a cortical priming.
Gómez
C
C
Laboratorio de Psicobiología, Facultad de Psicología, Seville, Spain.
Atienza
M
M
López-Mendoza
D
D
Gómez
G J
GJ
Vázquez
M
M
D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D004585:Electrooculography; D005071:Evoked Potentials / Q000502:physiology; D005133:Eye Movements / Q000502:physiology; D006225:Hand / Q000502:physiology; D006801:Humans; D009068:Movement / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D012438:Saccades / Q000502:physiology