Social reward motivation increases working memory capacity

社会奖励动机增加工作记忆容量

• 批准号: 20800075
• 负责人: KAWASAKI Masahiro
• 金额: $ 2.14万
• 依托单位: The Institute of Physical and Chemical Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (Start-up)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20800075/
• 关键词: 脳認知科学; 記憶; 動機付け; 生理; 認知心理学; 認知脳科学; ワーキングメモリ; 動機づけ; 脳波; 脳認知科学; 記憶; 動機付け; 生理; 認知心理学; 認知脳科学; ワーキングメモリ; 動機づけ; 脳波

To investigate the dynamic relationships between the visual working memory (VWM) and reward systems, we focused on the electroencephalograph (EEG) rhythms during a monetary incentive delayed-response task. 14 subjects were required to maintain several colored disks (3 or 6) during the retention interval. In case of the correct answer, they got the monetary reward which value (0, 10 or 50 Japanese yen) was presented at the beginning of each trial. Behavioral results showed that the VWM capacity for the high-reward condition was significantly increased as compared with the low- or no-reward conditions. EEG results showed that the frontal theta (6Hz) and the parietal alpha (12Hz) amplitudes are involved in the maintenance of the VWM since the activities increased during the retention interval and were correlated with the VWM capacity. The frontal beta delay-period amplitudes (24Hz) were significantly correlated with the increases of the VWM capacity from the high-reward to no-reward conditions. Interestingly, the frontal beta activity for reward motivation and the parietal alpha activity for VWM storage were significantly correlated under only the high-reward conditions. These findings suggest that the frontal-parietal system dynamically linked in beta and alpha frequency domains may implicate the increasing VWM capacity under high reward condition.

为了研究视觉工作记忆（VWM）和奖励系统之间的动态关系，我们专注于货币驱动器延迟响应任务期间的脑电图（EEG）节奏。在保留间隔内，需要14个受试者才能维持几个有色磁盘（3或6）。如果有正确的答案，他们获得了货币奖励，每次审判开始时都会提出价值（0、10或50日元）。行为结果表明，与低回报条​​件相比，高回报条件的VWM能力显着增加。脑电图结果表明，额叶（6Hz）和顶α（12Hz）幅度参与VWM的维持，因为在保留间隔内活动增加，并且与VWM容量相关。额叶beta延迟周期振幅（24Hz）与从高回报到无奖励条件的VWM容量的增加显着相关。有趣的是，仅在高回报条件下，奖励动机的额叶β活动和VWM存储的顶α活性显着相关。这些发现表明，在Beta和Alpha频域中动态链接的正面 - 额 - 可能意味着在高奖励条件下的VWM容量增加。