Towards affordable biomarkers of frontotemporal dementia: A classification study via network's information sharing

Martin Dottori, Lucas Sedenõ, Miguel Martorell Caro, Florencia Alifano, Eugenia Hesse, Ezequiel Mikulan, Adolfo M. Garciá, Amparo Ruiz-Tagle, Patricia Lillo, Andrea Slachevsky, Cecilia Serrano, Daniel Fraiman, Agustin Ibanez

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Developing effective and affordable biomarkers for dementias is critical given the difficulty to achieve early diagnosis. In this sense, electroencephalographic (EEG) methods offer promising alternatives due to their low cost, portability, and growing robustness. Here, we relied on EEG signals and a novel information-sharing method to study resting-state connectivity in patients with behavioral variant frontotemporal dementia (bvFTD) and controls. To evaluate the specificity of our results, we also tested Alzheimer's disease (AD) patients. The classification power of the ensuing connectivity patterns was evaluated through a supervised classification algorithm (support vector machine). In addition, we compared the classification power yielded by (i) functional connectivity, (ii) relevant neuropsychological tests, and (iii) a combination of both. BvFTD patients exhibited a specific pattern of hypoconnectivity in mid-range frontotemporal links, which showed no alterations in AD patients. These functional connectivity alterations in bvFTD were replicated with a low-density EEG setting (20 electrodes). Moreover, while neuropsychological tests yielded acceptable discrimination between bvFTD and controls, the addition of connectivity results improved classification power. Finally, classification between bvFTD and AD patients was better when based on connectivity than on neuropsychological measures. Taken together, such findings underscore the relevance of EEG measures as potential biomarker signatures for clinical settings.

Original languageEnglish
Article number3822
JournalScientific Reports
Volume7
Issue number1
DOIs
StatePublished - 1 Dec 2017

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