Human hippocampal theta activity during virtual navigation

@article{Ekstrom2005HumanHT,
  title={Human hippocampal theta activity during virtual navigation},
  author={Arne D. Ekstrom and Jeremy B. Caplan and Emily Ho and Kirk Shattuck and Itzhak Fried and Michael J. Kahana},
  journal={Hippocampus},
  year={2005},
  volume={15}
}
This study examines whether 4–8‐Hz theta oscillations can be seen in the human hippocampus, and whether these oscillations increase during virtual movement and searching, as they do in rodents. Recordings from both hippocampal and neocortical depth electrodes were analyzed while six epileptic patients played a virtual taxi‐driver game. During the game, the patients alternated between searching for passengers, whose locations were random, and delivering them to stores, whose locations remained… Expand
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  • Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2014
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It is argued that oscillatory models of navigation and memory derived from rodent data are relevant for humans, but that they should be modified to account for the slower frequency of the human theta rhythm. Expand
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TLDR
Intracranial recordings from epilepsy patients navigating in a desktop virtual reality environment are used to demonstrate that theta power is also increased in the human hippocampus around movement onset and throughout the remainder of movement, directly implicating human hippocampal theta in the encoding of translational movement. Expand
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TLDR
frequency bins affected in a virtual navigation task in 24 epilepsy patients implanted with foramen ovale electrodes were similar to those characterizing REM sleep in previous studies providing further indication that it is delta rather than theta that should be regarded as a human analog of the animal RSA. Expand
The functional role of human right hippocampal/parahippocampal theta rhythm in environmental encoding during virtual spatial navigation
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Significant evidence is provided that right hippocampal/parahippocampal theta activity is associated with environmental encoding in the human brain during spatial navigation, and theta in this region during the first training set correlated with spatial navigation performance across individuals in both training sets. Expand
Human hippocampal theta oscillations reflect sequential dependencies during spatial planning
Movement-related theta oscillations in rodent hippocampus coordinate ‘forward sweeps’ of location-specific neural activity that could be used to evaluate spatial trajectories online. This raises theExpand
Human hippocampal theta oscillations and the formation of episodic memories
TLDR
Recorded intracranial EEG data from 237 hippocampal electrodes in 33 neurosurgical patients as they performed an episodic memory task identified two distinct patterns of hippocampal oscillations, at ∼3 and ∼8 Hz, which are at the edges of the traditional 4–8 Hz human theta band. Expand
Human hippocampal theta oscillations reflect sequential dependencies during spatial planning
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