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Updated: Jun 23, 2026

Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
Multi-channel magnetoencephalogram on Alzheimer disease patients
I Abatzoglou1, P Anninos, I Tsalafoutas
1Laboratory of Medical Physics, Medical School, Democritus University of Thrace, Dragana, 68100, Alexandroupolis, Greece. abadzoglou@yahoo.gr
Abstract:
Magnetoencephalogram (MEG) recordings of 8 patients with advanced Alzheimer Disease (AD) and 9 normal individuals were obtained with a 122-channel whole head biomagnetometer SQUID (Superconductive Quantum Interference Device) to record the minute magnetic fields generated by the brain. The obtained MEG signals were analyzed using linear signal analysis techniques such as Fourier Transform in order to get the frequency distribution of MEG values. The obtained frequencies from all MEG sensors located outside the scalp of each subject were stored for evaluation. From this evaluation it was concluded that in patients with AD the dominant frequencies were significantly lower compared to normal individuals.
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