Original Research ARTICLE
P300, grey matter volume and individual characteristics correlates in healthy elderly
- 1Department of Neurosciences, KU Leuven, Belgium
- 2Department of Chronic Diseases, Metabolism and Ageing, KU Leuven, Belgium
- 3KU Leuven, Belgium
We investigated whether P300-ERP and cognitive test performance differ for age, sex and education in two groups of healthy elderly, and verified whether any correlations exist between P300 amplitude and latency and grey matter volume using whole brain voxel-by-voxel-based mapping, controlling for age, education, sex and Total Intracranial Volume (TIV). We used 32 channel electroencephalograms (EEG) to record the P300 responses and 3T Magnetic Resonance Imaging (MRI) to determine grey matter volume. We recruited 36 native-Dutch speaking healthy older subjects, equally divided in two sub-groups of 52-64 and 65-76 years old, administered a battery of cognitive tests and recorded their demographics, EEGs and task performance; additionally, 16 adults from the second sub-group underwent an MRI scan. We found significant differences between age groups in their cognitive tests performance, P300 amplitudes for the frontal and parietal electrodes for the most difficult task, and P300 latencies for frontal, central and parietal electrodes for all three tasks difficulty levels. Interesting, sex and education affected cognitive and P300 results. Higher education was related to higher accuracy, and P300 amplitudes and shorter latencies. Moreover, females exhibited higher P300 amplitudes and shorter latencies, and better cognitive tasks performance compared to males. Additionally, for the 16 adults underwent to MRI scan, we found positive correlations between P300 characteristics in frontal, central and parietal areas and grey matter volume, controlling for demographic variables and TIV, but also showing that age, sex and education correlate with grey matter volume. These findings provide support that age, sex and education affect an individual’s cognitive, neurophysiological and structural characteristics, and therefore motivate the need to further investigate these in relation to P300 responses and grey matter volume in healthy elderly.
Keywords: Magnetic Resonance Imaging, n-back task, gender, Education, P300-ERP, Elderly
Received: 21 Dec 2018;
Accepted: 17 Apr 2019.
Edited by:Junming Wang, Department of Pathology, University of Mississippi Medical Center, United States
Reviewed by:Bogdan O. Popescu, Carol Davila University of Medicine and Pharmacy, Romania
Luis Beltran-Parrazal, Universidad Veracruzana, Mexico
Copyright: © 2019 Pergher, Tournoy, Schoenmakers and Van Hulle. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Mrs. Valentina Pergher, Department of Neurosciences, KU Leuven, Leuven, Belgium, email@example.com