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American Journal of Alzheimer's Disease and Other Dementias®
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Article

EEG Markers Discriminate Among Different Subgroup of Patients With Mild Cognitive Impairment

D. V. Moretti, MD, PhD*, M. Pievani, Dr, C. Geroldi, MD, G. Binetti, MD, O. Zanetti, MD, P. M. Rossini, MD, and G. B. Frisoni, MD

* To whom correspondence should be addressed. E-mail: davide.moretti{at}afar.it.


  Abstract

Aim of the study is to discriminate among participants with mild cognitive impairment through electroencephalography brain rhythms. A total of 79 participants with MCI were classified into 4 subgroups based on the beginning of memory complaints up to the time of first visit. All participants underwent electroencephalography recording, magnetic resonance imaging, apolipoprotein E characterization, and volumetric morphometry estimation of hippocampal region. Electroencephalography markers show 2 distinct patterns: (1) increase of theta/delta power ratio and highest value of alpha2 band power in the group with shorter duration of disease, the greater right-left hippocampal volume difference and worst memory performance; (2) the highest value of alpha3 band power and the highest alpha3/alpha2 power ratio in the group with the lesser total hippocampal volume but preserved memory performance. Apolipoprotein E4 is linked to a major risk of early beginning of disease. Electroencephalography markers allow a mean correct percentage of correct classification up to 89%.

First published on February 9, 2009, doi:10.1177/1533317508329814
This version was published on February 10, 2009
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