fMRI dataset of successful and unsuccessful access to complex semantic information

Our ability to effectively retrieve complex semantic knowledge meaningfully impacts our daily lives, yet the interactions between semantic control and semantic representational systems that underly successful access and transient failures in access remain only partially understood. In this fMRI study, we contrast activation during successful semantic access, unsuccessful semantic access due to transient access-failures (i.e., ‘tip-of-the-tongue’, ‘feeling-of-knowing’), and trials where the semantic knowledge was not possessed. Twenty-four participants were presented 240 trivia-based questions relating to person, place, object or scholastic knowledge-domains. Whole brain analyses of the recall event indicate comparable recruitment of prefrontal semantic control systems during successful and unsuccessful semantic access and greater activation in representational systems in successful access. Region-of-interest analysis of domain-selective areas showed that successful access was generally ...我们有效提取复杂语义知识的能力，对日常生活具有切实影响，但支撑成功获取语义知识与暂时性提取失败的语义控制（semantic control）系统与语义表征系统（semantic representational systems）之间的交互机制，目前仍仅得到部分阐释。本功能磁共振成像（functional magnetic resonance imaging, fMRI）研究中，我们对比了三类实验条件下的脑激活模式：成功获取语义知识、因暂时性提取失败导致的语义获取失败（即「舌尖现象（tip-of-the-tongue）」与「知晓感（feeling-of-knowing）」），以及未掌握目标语义知识的试次。24名被试参与实验，需完成240道基于琐事常识的问题，问题涵盖人物、地点、物体及学术知识四大知识领域。对回忆事件的全脑分析结果显示，成功与失败的语义获取过程中，前额叶语义控制系统的招募程度相当；而成功获取语义知识时，表征系统的激活程度显著更高。对领域选择性脑区的感兴趣区（Region-of-interest, ROI）分析表明，成功获取语义知识通常……