Region and frequency specific changes of spectral power in Alzheimer's disease and mild cognitive impairment

Jee Hoon Roh, Moon Ho Park, Deokwon Ko, Kun Woo Park, Dae Hie Lee, Changsu Han, Sangmee Anh Jo, Kyung Sook Yang, Ki Young Jung

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Objectives: To find out whether healthy control (HC), amnestic mild cognitive impairment (aMCI), and Alzheimer's disease (AD) subjects exhibit region and frequency specific spectral power differences and whether the spectral power changes correlate with domain-specific cognitive function. Methods: Forty-one AD, 38 aMCI, and 39 HC subjects underwent quantitative EEG and comprehensive neuropsychological tests. Repeated measures analysis of variance was performed to identify differences in EEG spectral power among the three groups by scalp region and EEG frequency. Correlations between region and frequency specific spectral powers and neuropsychological test scores were evaluated. Results: Temporal and parieto-occipital theta band powers were highest in AD. Whereas, parieto-occipital alpha and frontal and temporal beta 2 band powers were highest in HC and lowest in AD (p<0.05). Temporal and parieto-occipital theta powers negatively correlated with verbal and visuospatial memory recall, while parieto-occipital alpha and temporal beta 2 powers positively correlated with verbal memory recall (p<0.01). Conclusions: Region and frequency specific oscillatory characteristics of EEG reflect domain-specific cognitive function in patients with aMCI and AD. Significance: Region and frequency specific spectral powers have clinical implications as additional markers differentiating AD, aMCI, and HC.

Original languageEnglish
Pages (from-to)2169-2176
Number of pages8
JournalClinical Neurophysiology
Volume122
Issue number11
DOIs
Publication statusPublished - 2011 Nov 1

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Keywords

  • Alzheimer's disease (AD)
  • Amnestic mild cognitive impairment (aMCI)
  • EEG
  • Frequency
  • Region
  • Spectral power

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Physiology (medical)
  • Sensory Systems

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