Qiu Jiang, Zhang Qinglin, Li Hong, Luo Yuejia, Yin Qinging, Chen Antao, Yuan Hong
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing, China.
Neuroreport. 2007 Jun 11;18(9):881-6. doi: 10.1097/WNR.0b013e3280d9e896.
High-density event-related potentials were recorded to examine the electrophysiologic correlates of the evaluation of possible answers provided during a Chinese character-generation task. We examined three conditions: the character given was what participants initially generated (Consistent answer), the character given was correct (Unexpected Correct answer), or it was incorrect (Unexpected Incorrect answer). Results showed that Unexpected Correct and Incorrect answers elicited a more negative event-related potential deflection (N320) than did Consistent answers between 300 and 400 ms. Dipole source analysis of difference waves (Unexpected Correct or Incorrect minus Consistent answers) localized the generator of the N320 in the anterior cingulate cortex. The N320 therefore likely reflects the cognitive change or conflict between old and new ways of thinking while identifying and judging characters.
记录高密度事件相关电位，以检查在汉字生成任务中对所提供的可能答案进行评估时的电生理相关性。我们研究了三种情况：给出的汉字是参与者最初生成的（一致答案）、给出的汉字是正确的（意外正确答案）或不正确的（意外错误答案）。结果表明，在300至400毫秒之间，意外正确和错误答案比一致答案引发了更负的事件相关电位偏转（N320）。对差异波（意外正确或错误减去一致答案）进行偶极子源分析，将N320的发生器定位在前扣带回皮层。因此，N320可能反映了在识别和判断汉字时新旧思维方式之间的认知变化或冲突。
