Brain Topography

, Volume 26, Issue 4, pp 547–557 | Cite as

Age-Related Task Sensitivity of Frontal EEG Entropy During Encoding Predicts Retrieval

  • Denis O’Hora
  • Stefan Schinkel
  • Michael J. Hogan
  • Liam Kilmartin
  • Michael Keane
  • Robert Lai
  • Neil Upton
Original Paper

Abstract

Age-related declines in memory may be due in part to changes in the complexity of neural activity in the aging brain. Electrophysiological entropy provides an accessible measure of the complexity of ongoing neural activity. In the current study, we calculated the permutation entropy of the electroencephalogram (EEG) during encoding of relevant (to be learned) and irrelevant (to be ignored) stimuli by younger adults, older adults, and older cognitively declined adults. EEG entropy was differentially sensitive to task requirements across groups, with younger and older controls exhibiting greater control of encoding-related activity than older declined participants. Task sensitivity of frontal EEG during encoding predicted later retrieval, in line with previous evidence that cognitive decline is associated with reduced ability to self-initiate encoding-related processes.

Keywords

EEG Memory Aging Entropy 

Supplementary material

10548_2013_278_MOESM1_ESM.zip (1.1 mb)
Supplementary material (ZIP 1,167 kb)

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Denis O’Hora
    • 1
  • Stefan Schinkel
    • 2
  • Michael J. Hogan
    • 1
  • Liam Kilmartin
    • 3
  • Michael Keane
    • 4
  • Robert Lai
    • 5
  • Neil Upton
    • 5
  1. 1.School of Psychology, NUI GalwayGalwayIreland
  2. 2.Departments of Physics and PsychologyHumboldt Universität zu BerlinBerlinGermany
  3. 3.College of Engineering and Informatics, NUI GalwayGalwayIreland
  4. 4.School of Nursing and Human SciencesDublin City UniversityDublin 9Ireland
  5. 5.Exploratory Medical Sciences, Neurology CEDD/CPDM/NFSP NorthHarlowUK

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