Human intracranial high-frequency activity maps episodic memory formation in space and time

被引:99
作者
Burke, John F. [1 ]
Long, Nicole M. [2 ]
Zaghloul, Kareem A. [3 ]
Sharan, Ashwini D. [4 ]
Sperling, Michael R. [5 ]
Kahana, Michael J. [2 ]
机构
[1] Univ Penn, Neurosci Grad Grp, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Psychol, Philadelphia, PA 19104 USA
[3] NINDS, Surg Neurol Branch, NIH, Bethesda, MD 20892 USA
[4] Thomas Jefferson Univ Hosp, Dept Neurol Surg, Philadelphia, PA 19107 USA
[5] Thomas Jefferson Univ Hosp, Dept Neurol, Philadelphia, PA 19107 USA
基金
美国国家卫生研究院;
关键词
Electrocorticography; Memory; Gamma; Functional mapping; ELECTROCORTICOGRAPHIC SPECTRAL-ANALYSIS; HUMAN SENSORIMOTOR CORTEX; FIELD POTENTIAL POWER; BOLD-FMRI; PREFRONTAL CORTEX; NEURAL ACTIVITY; GAMMA ACTIVITY; SUBSEQUENT MEMORY; SYNCHRONIZATION; SIGNAL;
D O I
10.1016/j.neuroimage.2013.06.067
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Noninvasive neuroimaging studies have revealed a network of brain regions that activate during human memory encoding; however, the relative timing of such activations remains unknown. Here we used intracranially recorded high-frequency activity (HFA) to first identify regions that activate during successful encoding. Then, we leveraged the high-temporal precision of HFA to investigate the timing of such activations. We found that memory encoding invokes two spatiotemporally distinct activations: early increases in HFA that involve the ventral visual pathway as well as the medial temporal lobe and late increases in HFA that involve the left inferior frontal gyrus, left posterior parietal cortex, and left ventrolateral temporal cortex. We speculate that these activations reflect higher-order visual processing and top-down modulation of attention/semantic information, respectively. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码:834 / 843
页数:10
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