| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
|
|---|
| Outline of Final Research Achievements |
According to predictive coding, the brain is constantly generating and updating a working model. In each region, the predicting model is compared to the sensory input or feedback signals. If they match, the model is maintained, but if they do not match, a Prediction Error is sent back up the network and the model is updated. Our hypothesis is beta and gamma rhythms reflect these processes.
In the present study, beta and high-gamma activities in frontal areas of monkeys were analyzed during performance of a bimanual task that required updating and maintenance of the memory of action sequences. Beta power was attenuated during early delay periods of updating trials but was increased during maintenance trials, while there was a reciprocal increase in high-gamma power during updating trials. In conclusion, beta rhythm is related to top-down signals and contribute to maintain the current model. In contrast, gamma rhythm is related to bottom-up signals to update current models.
|
