Theta-mediated dynamics of spatial information in hippocampus

Vladimir Itskov, Eva Pastalkova, Kenji Mizuseki, Gyorgy Buzsaki, Kenneth D. Harris

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

In rodent hippocampus, neuronal activity is organized by a 6-10 Hz theta oscillation. The spike timing of hippocampal pyramidal cells with respect to the theta rhythm correlates with an animal's position in space. This correlation has been suggested to indicate an explicit temporal code for position. Alternatively, it may be interpreted as a byproduct of theta-dependent dynamics of spatial information flow in hippocampus. Here we show that place cell activity on different phases of theta reflects positions shifted into the future or past along the animal's trajectory in a two-dimensional environment. The phases encoding future and past positions are consistent across recorded CA1 place cells, indicating a coherent representation at the network level. Consistent theta-dependent time offsets are not simply a consequence of phase-position correlation (phase precession), because they are no longer seen after data randomization that preserves the phase-position relationship. The scale of these time offsets, 100-300 ms, is similar to the latencies of hippocampal activity after sensory input and before motor output, suggesting that offset activity may maintain coherent brain activity in the face of information processing delays.

Original languageEnglish (US)
Pages (from-to)5959-5964
Number of pages6
JournalJournal of Neuroscience
Volume28
Issue number23
DOIs
StatePublished - Jun 4 2008

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Hippocampus
Theta Rhythm
Pyramidal Cells
Random Allocation
Automatic Data Processing
Rodentia
Brain
Place Cells

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

Itskov, Vladimir ; Pastalkova, Eva ; Mizuseki, Kenji ; Buzsaki, Gyorgy ; Harris, Kenneth D. / Theta-mediated dynamics of spatial information in hippocampus. In: Journal of Neuroscience. 2008 ; Vol. 28, No. 23. pp. 5959-5964.
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Itskov, V, Pastalkova, E, Mizuseki, K, Buzsaki, G & Harris, KD 2008, 'Theta-mediated dynamics of spatial information in hippocampus', Journal of Neuroscience, vol. 28, no. 23, pp. 5959-5964. https://doi.org/10.1523/JNEUROSCI.5262-07.2008

Theta-mediated dynamics of spatial information in hippocampus. / Itskov, Vladimir; Pastalkova, Eva; Mizuseki, Kenji; Buzsaki, Gyorgy; Harris, Kenneth D.

In: Journal of Neuroscience, Vol. 28, No. 23, 04.06.2008, p. 5959-5964.

Research output: Contribution to journalArticle

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