θ oscillation in the anterior cingulate and β-1 oscillation in the medial temporal cortices: A human case report

Sunao Uchida, Taketoshi Maehara, Nobuhide Hirai, Kensuke Kawai, Hiroyuki Shimizu

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In previous studies we observed γ (30-150Hz) and β-1 (10-20 Hz) oscillations in the medial temporal lobe (MTL) using subdural electrodes. The β-1 was present during wake and REM sleep while γ was present in all states. Recently we studied a patient (35 years M) with electrodes attached to the anterior cingulate cortex (ACC). This structure showed regular θ (5-6 Hz) oscillations. In the first recording, electrodes were attached to the MTL, that demonstrated the β-1 and γ oscillations. Two months later, electrodes were placed on orbitofrontal and ACC and an all night sleep recording was carried out. The ACC exhibited a highly regular and continuous θ oscillation during wakefulness and REM sleep, but not during NREM sleep. Since this same subject showed β-1 oscillations in the MTL, it is probable that the θ in the ACC is independent of β-1 in the MTL. This single case suggests the existence of two different frequency oscillators in the human limbic system. Elucidating their functional roles will be an interesting challenge for future studies.

Original languageEnglish
Pages (from-to)371-374
Number of pages4
JournalJournal of Clinical Neuroscience
Volume10
Issue number3
DOIs
Publication statusPublished - 2003 May
Externally publishedYes

Keywords

  • β-1
  • γ
  • θ oscillations
  • Anterior cingulate cortex
  • Electrocorticogram
  • Human
  • Medial temporal lobe

ASJC Scopus subject areas

  • Clinical Neurology
  • Psychiatry and Mental health
  • Neurology

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