Augmenting Cognitive Training in Older Adults - The ACT Grant

增强老年人的认知训练 - ACT 补助金

• 批准号: 9194772
• 负责人: RONALD A COHEN
• 金额: $ 133.92万
• 依托单位: UNIVERSITY OF FLORIDA
• 依托单位国家: 美国
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2021-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9194772
• 关键词: Adult; Age; Age-Years; Age-associated memory impairment; Aging; Alzheimer' s Disease; Alzheimer' s disease risk; Area; Arizona; Arousal; Attention; Biological Markers; Blood Vessels; Brain; Brain region; Cerebrum; Characteristics; Choline; Clinical; Clinical Trials; Cognitive; Cognitive aging; Coupled; Demographic Factors; Diabetes Mellitus; Disease; Educational Intervention; Elderly; Elderly man; Elderly woman; Enrollment; Exposure to; Family history of; Florida; Freezing; Functional Magnetic Resonance Imaging; Gender; Genotype; Grant; Growth; Impaired cognition; Individual; Individual Differences; Inferior; Institutes; Intervention; Learning; Magnetic Resonance Imaging; Magnetic Resonance Spectroscopy; Measures; Medial; Memory; Metabolic; Metabolism; Methods; Motor; Multi-Institutional Clinical Trial; N-acetylaspartate; Nature; Neurocognitive; Neurodegenerative Disorders; Neuronal Plasticity; Outcome; Outcome Measure; Parietal Lobe; Participant; Performance; Phase; Physiological; Placebos; Population; Predictive Value; Prevalence; Protons; Public Health; Randomized; Randomized Clinical Trials; Readiness; Recording of previous events; Recruitment Activity; Research; Research Infrastructure; Rest; Risk Factors; Science; Secondary to; Shark; Short-Term Memory; Site; Structure; System; Testing; Time; Training; Training and Education; United States; Universities; Work; active control; age related; association cortex; base; cognitive ability; cognitive function; cognitive performance; cognitive task; cognitive training; combat; effective intervention; experience; follow-up; frontal lobe; functional improvement; functional outcomes; functional status; gamma-Aminobutyric Acid; improved; insight; intervention effect; memory encoding; memory process; multi-site trial; myoinositol; neuroimaging; prevent; processing speed; relating to nervous system; response; skills; white matter

ABSTRACT: This randomized clinical trial will test whether transcranial direct current stimulation (tDCS) of frontal cortices enhances neurocognitive and functional outcomes achieved from cognitive training in older adults experiencing age-related cognitive decline. Change in well-validated measures of neurocognitive function and everyday abilities will serve as outcome measures. Functional and structural neuroimaging biomarkers of neural plasticity and learning (fMRI, GABA MRS, etc.) will measure intervention-associated alterations in specific brain regions impacted by cognitive aging. tDCS is a noninvasive brain stimulation method that facilitates neural plasticity and learning. Accordingly, when used as an adjunctive intervention, tDCS may augment cognitive training effects. This study will leverage existing multisite clinical trial infrastructure at McKnight Brain Institutes located in two of the states with the largest representation of older adults in the United States: University of Florida, University of Miami, and University of Arizona. Adults over the age of 65 represent the fastest growing group in the US population. As such, age-related cognitive decline represents a major concern for public health. Recent research suggests that cognitive training in older adults can improve cognitive performance, with effects lasting up to 10 years. However, effects are typically limited to the tasks trained, with little transfer to other cognitive abilities or everyday skills. Effects may also be reduced in people with Alzheimer's disease risk factors. A two-phase multisite randomized clinical trial will examine the individual and combined impact of pairing cognitive training with transcranial direct current stimulation (tDCS) in older adults experiencing age-related cognitive decline (n = 360; 120 per site). Participants will consist of elderly men and women 65-90 years of age with evidence of age-related cognitive decline, but not MCI or Alzheimer's disease (MoCA≥25). We will compare changes in cognitive and brain function resulting from CT and CT combined with tDCS using a comprehensive neurocognitive, clinical, and multimodal neuroimaging assessment of brain structure, function, and metabolic state. Functional magnetic resonance imaging (fMRI) will be used to assess brain response during working memory, attention, and memory encoding; the active cognitive abilities trained by CT. Proton magnetic resonance spectroscopy (MRS) will assess markers of neural plasticity, GABA concentrations, and cerebral metabolism. We hypothesize that: 1) tDCS will enhance neurocognitive function, brain function, and functional outcomes from CT; 2) Effects of tDCS on CT will be maintained up to 12 months following training, and 3) Neuroimaging biomarkers of cerebral metabolism, neural plasticity (GABA concentrations) and functional brain response (fMRI) during resting vs. active cognitive tasks will predict individual response to tDCS, with certain Alzheimer's risk factors (e.g., APOE4 genotype, family history of Alzheimer's disease) predicting poorer cognitive and functional outcome. To date, no studies have comprehensively examined combined CT and tDCS intervention in the elderly. This study will provide definitive insight into the value of combating cognitive decline in a rapidly aging US population using tDCS with cognitive training.

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