Human intracranial high-frequency activity maps episodic memory formation in space and time. Burke, J. F.; Long, N. M.; Zaghloul, K. A.; Sharan, A. D.; Sperling, M. R.; and Kahana, M. J. NeuroImage.
Human intracranial high-frequency activity maps episodic memory formation in space and time [link]Paper  doi  abstract   bibtex   
Abstract 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.
@article{ burke_human_????,
  title = {Human intracranial high-frequency activity maps episodic memory formation in space and time},
  issn = {1053-8119},
  url = {http://www.sciencedirect.com/science/article/pii/S1053811913007052},
  doi = {10.1016/j.neuroimage.2013.06.067},
  abstract = {Abstract 
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.},
  urldate = {2013-07-08},
  journal = {{NeuroImage}},
  author = {Burke, John F. and Long, Nicole M. and Zaghloul, Kareem A. and Sharan, Ashwini D. and Sperling, Michael R. and Kahana, Michael J.},
  keywords = {Electrocorticography, Memory, functional mapping, gamma}
}
Downloads: 0