...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Brain and cognition >Regional and inter-regional theta oscillation during episodic novelty processing
【24h】

Regional and inter-regional theta oscillation during episodic novelty processing

机译：情节新颖性处理过程中的区域和区域间theta振荡

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent event-related potential (ERP) and functional magnetic resonance imaging (fMRI) studies suggest that novelty processing may be involved in processes that recognize the meaning of a novel sound, during which widespread cortical regions including the right prefrontal cortex are engaged. However, it remains unclear how those cortical regions are functionally integrated during novelty processing. Because theta oscillation has been assumed to have a crucial role in memory operations, we examined local and inter-regional neural synchrony of theta band activity during novelty processing. Fifteen right-handed healthy university students participated in this study. Subjects performed an auditory novelty oddball task that consisted of the random sequence of three types of stimuli such as a target (1000 Hz pure tone), novel (familiar environmental sounds such as dog bark, buzz, car crashing sound and so on), and standard sounds (950 Hz pure tone). Event-related spectra perturbation (ERSP) and the phase-locking value (PLV) were measured from human scalp EEG during task. Non-parametric statistical tests were applied to test for significant differences between stimulus novelty and stimulus targets in ERSP and PLV. The novelty P3 showed significant higher amplitude and shorter latency compared with target P3 in frontocentral regions. Overall, theta activity was significantly higher in the novel stimuli compared with the target stimuli. Specifically, the difference in theta power between novel and target stimuli was most significant in the right frontal region. This right frontal theta activity was accompanied by phase synchronization with the left temporal region. Our results imply that theta phase synchronization between right frontal and left temporal regions underlie the retrieval of memory traces for unexpected but familiar sounds from long term memory in addition to working memory retrieval or novelty encoding.
机译：最近的事件相关电位（ERP）和功能磁共振成像（fMRI）研究表明，新颖处理可能参与了识别新颖声音含义的过程，在此过程中，包括右前额叶皮层在内的广泛皮质区域都在活动。然而，尚不清楚在新颖性处理期间如何在功能上整合那些皮质区域。由于假设θ振荡在记忆操作中起着至关重要的作用，因此我们研究了新颖性处理期间θ带活动的局部和区域间神经同步。十五名右撇子健康的大学生参加了这项研究。受试者执行了听觉新颖的奇异球任务，该任务由目标（1000 Hz纯音），新颖的（狗吠，嗡嗡声，撞车声等熟悉的环境声）三种刺激类型的随机序列组成，以及标准声音（950 Hz纯音）。事件相关的光谱扰动（ERSP）和锁相值（PLV）是在任务期间从人类头皮脑电图测量的。采用非参数统计检验来检验ERSP和PLV中刺激新颖性和刺激目标之间的显着差异。与目标P3相比，新颖性P3在额中央区域表现出明显更高的幅度和更短的等待时间。总体而言，与目标刺激相比，新型刺激中的theta活性明显更高。具体而言，新颖的刺激和目标刺激之间的theta能力差异在右额叶区域最为明显。这种右额叶活动与左颞区同步。我们的结果表明，除了工作存储器检索或新颖性编码之外，右额叶区域和左颞叶区域之间的theta相位同步是从长期记忆中检索意外但熟悉的声音的记忆轨迹的基础。

著录项

  • 来源
    《Brain and cognition》 |2014年第10期|70-75|共6页
  • 作者

    Gwan-Taek Lee; Chany Lee; Kyung Hwan Kim; Ki-Young Jung;

  • 作者单位

    Department of Neurology, Korea University College of Medicine, 73 Inchon-Ro, Anam-Dong, Seongbuk-Gu, Seoul 136-705, Republic of Korea;

    Department of Neurology, Korea University College of Medicine, 73 Inchon-Ro, Anam-Dong, Seongbuk-Gu, Seoul 136-705, Republic of Korea;

    Department of Biomedical Engineering, College of Health Science, Yonsei University, 234 Maeji-ri, Heungup-myun, Wonju, Gangwon-do, Republic of Korea;

    Department of Neurology, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, Seoul 110-744, Republic of Korea;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Event-related potentials; Recognition; Novelty; Theta rhythm;

    机译：与事件相关的潜力;承认;新颖性Theta节奏;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号