Blog
About

  • Record: found
  • Abstract: found
  • Article: not found

Oscillatory activity in the monkey hippocampus during visual exploration and memory formation.

Proceedings of the National Academy of Sciences of the United States of America

Animals, Brain Mapping, Hippocampus, physiology, Macaca mulatta, Magnetic Resonance Imaging, Male, Memory, Photic Stimulation, Psychomotor Performance, Saccades, Theta Rhythm, Time Factors

Read this article at

ScienceOpenPublisherPMC
Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      Primates explore the visual world through the use of saccadic eye movements. Neuronal activity in the hippocampus, a structure known to be essential for memory, is modulated by this saccadic activity, but the relationship between visual exploration through saccades and memory formation is not well understood. Here, we identify a link between theta-band (3-12 Hz) oscillatory activity in the hippocampus and saccadic activity in monkeys performing a recognition memory task. As monkeys freely explored novel images, saccades produced a theta-band phase reset, and the reliability of this phase reset was predictive of subsequent recognition. In addition, enhanced theta-band power before stimulus onset predicted stronger stimulus encoding. Together, these data suggest that hippocampal theta-band oscillations act in concert with active exploration in the primate and possibly serve to establish the optimal conditions for stimulus encoding.

      Related collections

      Author and article information

      Journal
      23878251
      3740906
      10.1073/pnas.1302351110

      Comments

      Comment on this article