Topography of the lambda-like response in rapid eye movement sleep: A current source-density analysis

  1. Keiko OGAWA,
  2. Hiroshi NITTONO,
  3. Tadao HORI

Article first published online: 10 JUN 2003

DOI: 10.1046/j.1446-9235.2003.00029.x

Issue

Sleep and Biological Rhythms

Sleep and Biological Rhythms

Volume 1, Issue 2, pages 153–154, June 2003

Additional Information

How to Cite

OGAWA, K., NITTONO, H. and HORI, T. (2003), Topography of the lambda-like response in rapid eye movement sleep: A current source-density analysis. Sleep and Biological Rhythms, 1: 153–154. doi: 10.1046/j.1446-9235.2003.00029.x

Author Information

  1. Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Japan

* Dr T Hori, Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima, 739-8521, Japan. Email: tdhori@hiroshima-u.ac.jp

Publication History

  1. Issue published online: 10 JUN 2003
  2. Article first published online: 10 JUN 2003
  3. Accepted for publication 18 October 2002.

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Keywords:

  • current source density;
  • dreaming;
  • lambda response;
  • rapid eye movements;
  • rapid eye movement sleep

Abstract

Lambda response (P1 and P2) reflects visual information processing after saccades in wakefulness. Similar potentials also occur after rapid eye movements (REMs) in REM sleep. In this study, current source density (CSD) maps of these potentials were compared. Sixteen healthy, young volunteers participated in the wake and sleep sessions. Saccades were recorded during a self-paced visual search task, and REMs were recorded during natural nocturnal sleep. The P1 showed a focus of CSD at the occipital site (Oz) in wakefulness but at the parieto-occipital site (POz) in REM sleep. The P2 had a CSD focus at POz in both states. These results suggest the cortical sources of the P1 after rapid eye movements differ between REM sleep and wakefulness.

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