Professor Shigeru Kitazawa of the Dynamic Brain Network Laboratory, Graduate School of Frontier Biosciences, Osaka University and Masahito Inoue, Associate Professor of the International Medical and Engineering Information Center of the same university, said that the parietal lobe of the cerebral cortex is the cause of the error in the movement to reach out. It was discovered that a correction signal was emitted by distinguishing between the case of one case and the case of the other party.
Why does exercise get better after repeated practice?It can be said that the brain learns to reduce the "mistakes" of exercise.However, there are two types of "mistakes": one is caused by the inadequacy of one's movement control (motion error) and the other is caused by the unexpected movement of the other party (target error).Different learning must be done depending on the cause.
Therefore, the research group of Professor Kitazawa et al. Focused on the parietal lobe of monkeys to investigate whether the brain was learning by distinguishing between motion error and target error.
First, I let the monkey reach for the target of the cross that appears in front of me.At that time, the conditions are set when the field of view is shifted using a prism device (motion error condition) and when the target is moved in a random direction during motion (target error condition).Under these two conditions, the activity of neurons in the parietal lobe was recorded.
As a result, it was found that the region called Brodmann area 5 detects the motion error and sends a signal for correction, and Brodmann area 7 detects the target error and sends a signal for correction.
In this study, the brain does not detect the error between the hand and the target mechanically, but distinguishes whether it is the motion error caused by itself or the target error caused by the other party, and corrects it with a separate system. It was proved that.
This result is expected to lead to the development of effective learning methods for sports and effective learning adjustment methods for autonomous driving and robot control.
Paper information:[Current Biology] Motor error in parietal area 5 and target error in area 7 drive distinctive adaptation in reaching