title: Synthesis of the contingent negative variation brain potential from noncontingent stimulus and motor elements.
abstract: Slow shifts in brain potential (commonly called the contingent negative variation), obtained during a warned reaction-time task with a foreperiod of 1 second, were compared with waveforms synthesized by the addition of separately obtained potentials associated with individual (nonpaired) sensory stimuli and self-initiated motor movements. The synthesized waveforms match closely the actual contingent negative variation, suggesting that it is constituted largely of separate, noncontingent elements related to sensory and motor processes.
mesh_terms: D001307:Auditory Perception / Q000502:physiology; D001921:Brain / Q000502:physiology*; D003265:Contingent Negative Variation; D004594:Electrophysiology; D006801:Humans; D009068:Movement; D014796:Visual Perception / Q000502:physiology