Chronic Implantation of Whole-cortical Electrocorticographic Array in the Common Marmoset

Misako Komatsu, Takaaki Kaneko, Hideyuki Okano, Noritaka Ichinohe

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Electrocorticography (ECoG) allows the monitoring of electrical field potentials from the cerebral cortex with high spatiotemporal resolution. Recent development of thin, flexible ECoG electrodes has enabled conduction of stable recordings of large-scale cortical activity. We have developed a whole-cortical ECoG array for the common marmoset. The array continuously covers almost the entire lateral surface of cortical hemisphere, from the occipital pole to the temporal and frontal poles, and it captures whole-cortical neural activity in one shot. This protocol describes a chronic implantation procedure of the array in the epidural space of the marmoset brain. Marmosets have two advantages regarding ECoG recordings, one being the homologous organization of anatomical structures in humans and macaques, including frontal, parietal, and temporal complexes. The other advantage is that the marmoset brain is lissencephalic and contains a large number of complexes, which are more difficult to access in macaques with ECoG, that are exposed to the brain surface.These features allow direct access to most cortical areas beneath the surface of the brain. This system provides an opportunity to investigate global cortical information processing with high resolutions at a sub-millisecond order in time and millimeter order in space.

Original languageEnglish
Article numbere58980
JournalJournal of Visualized Experiments
Issue number144
Publication statusPublished - 2019 Feb


  • ECoG
  • Issue 144
  • Neuroscience
  • awake recording
  • electrophysiology
  • local field potential
  • non-human primate
  • surgical operation

ASJC Scopus subject areas

  • Neuroscience(all)
  • Chemical Engineering(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)


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