Countervail Cognitive and Cerebral Decline in Mild Cognitive Impairment Patients Using Non-medical Interventions

This test can be applied by telephone or face-to-face (in this study we will apply the face-to-face method). The outcome consists of increase or less decrease (experimental group 1 or 2 vs. the control group) of the total weighted score at the COGTEL test directly after the 6 months interventions as compared to directly before the interventions.

The COGTEL test provides a main weighted score of core cognitive function, it comprises 6 subtests covering prospective memory, short- and long-term verbal memory, working memory (digit span), verbal fluency and inductive reasoning.

COGTEL main weighted score: COGTEL Total score = 7.2 x Prospective Memory score + 1.0 x Verbal Short-Term Memory score + 0.9 x Verbal Long-Term Memory score + 0.8 x Working Memory score + 0.2 x Verbal Fluency score + 1.7 x Inductive Reasoning score

(Kliegel, Martin, & Jager, 2007, doi:10.3200/JRLP.141.2.147-172) (lhle et al., 2017, doi:10.1159/000479680)

Individual subtests of the COGTEL: prospective memory, short- and long-term verbal memory, working memory (digit span), verbal fluency, and inductive reasoning; the outcome consists of increase or less decrease (experimental group 1 or 2 vs. the control group) of each subtest score directly after the 6 months interventions as compared to directly before the interventions.

D2-R test (attention, processing speed): correct responses/hits minus errors/omissions; the outcome consists of increase or less decrease (experimental group 1 or 2 vs. the control group) of the total score directly after the 6 months interventions as compared to directly before the interventions.

Trail making test A (visual processing speed) & B (visual processing speed & cognitive flexibility): time to complete the test A and B; the outcome consists in decrease or less increase in time to complete the tests (experimental group 1 or 2 vs. the control group) directly after the 6 months interventions as compared to directly before the interventions.

Go/No-Go (inhibition): number of errors ; the outcome consists of decrease or less increase (experimental group 1 or 2 vs. the control group) of the total score directly after the 6 months interventions as compared to directly before the interventions.

Speech-in-noise perception test. The outcome is a score of Speech Reception Threshold (SRT), measured for both ears and each ear separately (Kollmeier et al., 2105, doi: 10.3109/14992027.2015.1020971).

fMRI letter n-back visual working memory task (Migo et al., 2015, doi.org/10.1080/13825585.2014.894958): correct responses; the outcome consists of increase or less decrease (experimental group 1 or 2 vs. the control group) of the total score directly after the 6 months interventions as compared to directly before the interventions.

Higher total score of the following sensorimotor tests in the 2 experimental intervention groups as compared to the active control group directly after the 6 months interventions as compared to directly before the interventions.

• Clock drawing test (assessing apraxia) (Aprahamian, Martinelli, Neri, & Yassuda, 2009, doi: 10.1590/S1980-57642009DN30200002)
• Purdue Pegboard (assessing manual dexterity) (Tiffin & Asher, 1948, doi: 10.1037/h0061266)
• Unipedal balance test (Bohannon & Tudini, 2018; doi:10.1016/j.physio.2018.04.001)
• Laterality test (assessing left/right judgements) (Williams et al., 2019, doi: 10.1016/j.msksp.2019.01.010)

Daily living activities: improved daily living activities as measured by the A-IADL-Q(SV; Short Version of the Amsterdam Instrumental Activity of the Daily Living Questionnaire) in the 2 experimental intervention groups as compared to the control group directly after the 6 months interventions as compared to directly before the interventions (Jutten et al., 2017, doi:10.1016/j.dadm.2017.03.002).

Subjective well-being: improved subjective well-being in both intervention groups as measured by the WHOQOL-BREF (1996) directly after the 6 months interventions as compared to directly before the interventions. (Organization, W. H. (1996). WHOQOL-BREF: introduction, administration, scoring and generic version of the assessment: field trial version, December 1996.)

Emotional regulation: improved emotional regulation in the experimental groups as compared to the control group directly after the 6 months interventions as compared to directly before the interventions (Christophe et al., 2009 doi: 10.1016/j.erap.2008.07.001).

MP2RAGE is an extension of the conventional MPRAGE pulse sequence widely used in clinical studies. It involves gray matter volume assessment, allowing to evaluate gray matter changes following learning of new skills (Marques & Gruetter, 2013, doi:10.1371/journal.pone.0069294).

Letter N-back visual working memory task (Migo et al., 2015, doi.org/10.1080/13825585.2014.894958). Allows evaluating visual working memory performance following learning of new skills.

RS-fMRI assesses activity in the Default Mode Network (DMN) reflecting global functional connectivity of the brain (Leonardi et al., 2013, doi: 10.1016/j.neuroimage.2013.07.019). Allows evaluating functional connectivity changes following learning of new skills.

DTI allows computing i.a. Fractional Anisotropy for evaluating white matter integrity reflecting structural connectivity (Bosch et al., 2012, doi: 10.1016/j.neurobiolaging.2010.02.004). Allows evaluating structural connectivity changes following learning of new skills.