| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
The aim of this research is to study neural correlates responsible for apathy by analyzing event-related brain potentials evoked in experimental paradigms reflecting human motivation. First, a cue-target-feedback task based on reinforcement learning was developed. A significant relationship was observed between apathy and the amplitude of feedback-related negativity (FRN) evoked in that task. Second, in a motivated discriminative reaction time task, the FRN amplitude evoked in the reward condition was associated with reward-dependency of personality. The reaction time in the non-reward condition was prolonged associated with the severity of apathy. These results indicate that FRN could be an electrophysiological index for extrinsic motivation and apathy, and apathy is also represented by diminished intrinsic motivation.
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