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Spectral analysis of the EEG and 99m-Tc-HMPAO SPECT-scan in Alzheimer's disease

  • V. I. Kwa
  • , H. C. Weinstein
  • , E. F. Posthumus Meyjes
  • , E. A. van Royen
  • , L. J. Bour
  • , P. N. Verhoeff
  • , B. W. Ongerboer de Visser

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

99m-technetium-hexamethylpropylene-amineoxine (99m-Tc-HMPAO) single-photon-emission-computer-tomography (SPECT)-scans and spectral analyzed electroencephalogram (EEGs) of 20 patients with Alzheimer's disease (AD) were studied. A significant correlation was found between the temporoparietal-cerebellar-ratio (TP/C-ratio) of the SPECT-scan and the peak frequencies of leads T3-T5, C3-P3, and C4-P4 of the EEG. In addition a significant negative correlation between the TP/C-ratio and the theta/alpha-ratio (t/a-ratio) of leads T3-T5, T4-T6, C3-P3, and C4-P4 was demonstrated. Our study demonstrates that slowing of the EEG parallels a decrease in blood flow in the temporoparietal regions in AD-patients. Both findings could be parallel phenomena of regional hypometabolism
Original languageEnglish
Pages (from-to)100-107
JournalBiological psychiatry
Volume33
Issue number2
DOIs
Publication statusPublished - 1993

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