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      Effects of monetary reward and punishment on stimulus-preceding negativity.

      Psychophysiology
      Adult, Brain Mapping, Conditioning, Operant, physiology, Data Interpretation, Statistical, Electroencephalography, Electromyography, Emotions, Female, Humans, Male, Patch-Clamp Techniques, Psychomotor Performance, Punishment, Reward

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          Abstract

          This study examined the effects of emotional valence on stimulus-preceding negativity (SPN) using reward and fine. A time estimation task under reward, punishment, combined, and control conditions was performed. Participants were rewarded for accurate responses in the reward condition, and were fined for incorrect estimations in the punishment condition. in the combined condition, correct responses were rewarded and incorrect responses were fined. In the control condition, neither a reward nor fine was used. Results showed a significant interaction of condition x hemisphere. The SPN at the left hemisphere was increased in the reward condition. For the punishment effect, although it evoked right hemisphere dominance, no conditional difference was apparent at the right hemisphere. These results suggest that the SPN is affected by positive emotion: The left hemisphere activation might represent a pleasant emotion accompanying monetary gain.

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