A human intracranial study of long-range oscillatory coherence across a frontal-occipital-hippocampal brain network during visual object processing Academic Article uri icon


MeSH Major

  • Frontal Lobe
  • Hippocampus
  • Visual Pathways


  • Visual object-recognition is thought to involve activation of a distributed network of cortical regions, nodes of which include the lateral prefrontal cortex, the so-called lateral occipital complex (LOC), and the hippocampal formation. It has been proposed that long-range oscillatory synchronization is a major mode of coordinating such a distributed network. Here, intracranial recordings were made from three humans as they performed a challenging visual object-recognition task that required them to identify barely recognizable fragmented line-drawings of common objects. Subdural electrodes were placed over the prefrontal cortex and LOC, and depth electrodes were placed within the hippocampal formation. Robust beta-band coherence was evident in all subjects during processing of recognizable fragmented images. Significantly lower coherence was evident during processing of unrecognizable scrambled versions of the same. The results indicate that transient beta-band oscillatory coupling between these three distributed cortical regions may reflect a mechanism for effective communication during visual object processing.

publication date

  • March 18, 2008



  • Academic Article



  • eng

PubMed Central ID

  • PMC2393806

Digital Object Identifier (DOI)

  • 10.1073/pnas.0708418105

PubMed ID

  • 18334648

Additional Document Info

start page

  • 4399

end page

  • 404


  • 105


  • 11