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Article type: Research Article
Authors: Pisano, Francescaa | Caltagirone, Carlob | Satriano, Federicab | Perri, Robertab | Fadda, Luciab | Marangolo, Paolaa; b; *
Affiliations: [a] Department of Humanities studies - University Federico II, Naples, Italy | [b] IRCCS Santa Lucia Foundation, Rome, Italy
Correspondence: [*] Correspondence to: Prof. Paola Marangolo, University Federico II, Naples, Italy; IRCCS, Fondazione Santa Lucia, Rome, Italy. Tel.: +39 065 1501 179; E-mail: [email protected].
Abstract: Background:Recently, a growing body of evidence has shown that, from the early stage of impairment, Alzheimer’s patients (AD) present difficulties on a variety of tasks mostly relying on executive functions. These strongly impact their daily life activities causing a severe loss of independency and autonomy. Objective:To evaluate the efficacy of transpinal direct current stimulation (tsDCS) combined with cognitive trainings for improving attentional and executive function abilities in a group of AD patients. Methods:In a randomized-double blind design, sixteen AD patients underwent different cognitive trainings combined with tsDCS. During the treatment, each subject received tsDCS (20 min, 2 mA) over the thoracic vertebrae (IX-X vertebrae) in two different conditions: 1) anodal, and 2) sham while performing three computerized tasks: alertness, selective attention, and executive functions. Each experimental condition was run in ten consecutive daily sessions over two weeks. Results:After anodal tsDCS, a greater improvement in executive functions compared to sham condition was found. More importantly, the follow-up testing revealed that these effects lasted over 1 month after the intervention and generalized to the different neuropsychological tests administered before, after the treatment and at one month after the end of the intervention. This generalization was present also in the attentional domain. Conclusion:This evidence emphasizes, for the first time, that tsDCS combined with cognitive training results efficacious for AD patients. We hypothesize that enhancing activity into the spinal sensorimotor pathways through stimulation improved cognitive abilities which rely on premotor activity, such as attention and executive functions.
Keywords: Alzheimer’s disease, cognitive training, neuromodulation, transpinal stimulation, tsDCS
DOI: 10.3233/JAD-200695
Journal: Journal of Alzheimer's Disease, vol. 77, no. 4, pp. 1755-1764, 2020
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