Abstract
Stimulus-preceding negativity (SPN), readiness potential (RP), and contingent negative variation (CNV) were recorded to verify the hypothesis that the CNV late wave is the sum of the RP and the SPN. SPN and RP were elicited using a time-estimation task, and the CNV was recorded using a warned reaction-time task. A “virtual CNV” was calculated by superimposing the SPN on the RP. Then the real and virtual CNVs were compared to evaluate the hypothesis. Although an amplitude difference between the real and virtual CNV late waves was observed at the frontal site, the amplitudes at the central and parietal sites were not different between the two. These results suggest that the CNV late wave and the SPN might have a common underlying physiological mechanism in the parietal area, and that these potentials might be related to attentional systems.
Highlights
Contingent negative variation (CNV) is an even-related brain potential (ERP) that relates to motor preparation and anticipatory behavior [1]; it can be elicited in a warned reaction-time paradigm
Stimulus-preceding negativity (SPN), readiness potential (RP), and contingent negative variation (CNV) were recorded to verify the hypothesis that the CNV late wave is the sum of the RP and the SPN
If the virtual CNV is compared to the real CNV, it might be possible to verify the hypothesis that the CNV late wave is the sum of the RP and the parietal dominant SPN that reflects perceptual anticipation
Summary
Contingent negative variation (CNV) is an even-related brain potential (ERP) that relates to motor preparation and anticipatory behavior [1]; it can be elicited in a warned reaction-time paradigm. In such a task, a warning stimulus is presented preceding a response stimulus, and a participant has to make a motor response as quickly as possible after the response stimulus appears. The early wave seems to be related to the salience and signal value of the warning stimulus [3], the functional significance of the late wave is more complicated. How nonmotor processes including anticipation contribute to the late wave is unclear
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