This project will answer important questions regarding remediation of cognitive decline in older adults and address two critical areas of training: advanced imaging (magnetic resonance spectroscopy, functional connectivity) and cognitive/clinical aging interventions (cognitive training). The PI is a cognitive neuroscientist wth a strong background in transcranial direct current stimulation (tDCS), cognition, and electrophysiology, as well as a basic understanding of magnetic resonance imaging. The K01 will provide protected time and training to focus his research career firmly in cognitive aging, specifically focusing on the development of novel non- invasive treatments for age-related cognitive decline. This training will afford the knowledge required to translate his basic science expertise into clinical translational applications in aging populations. The current study will investigate a method for enhancing cognitive training effects in healthy older adults and improving functional transfer of skills by employing a combined intervention approach targeting facilitation of neural plasticity and optimal learning state. Adults over the age of 65 represent te fastest growing portion of 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 have lasting effects on performance, lasting up to 10 years. However, these effects are typically limited to the tasks trained, with little transfer to other cognitive abilities or evryday skills. This study will examine the impact of pairing cognitive training with tDCS. Individual effects of tDCS and cognitive training on cognitive, functional, and neuroimaging measures will be assessed. tDCS is a non-invasive brain stimulation method that directly stimulates brain regions involved in active cognitive function and enhances neural plasticity when paired with a variety of cognitive tasks. We will compare changes in cognitive and brain function resulting from cognitive training and cognitive training combined with tDCS using a comprehensive neurocognitive, clinical, and multimodal neuroimaging assessment of brain structure, function, and metabolic state. Functional connectivity from functional magnetic resonance imaging (fMRI) will be used to assess the coherence of brain response during working memory and focused attention; the active cognitive abilities trained by cognitive training. Proton magnetic resonance spectroscopy (MRS) will assess cerebral metabolites, including GABA concentrations sensitive to neural plasticity in task-associated brain ROIs. We hypothesize that: 1) tDCS will enhance neurocognitive function, brain function, and functional improvements from cognitive training; 2) Effects of tDCS on cognitive training will be maintained up to 3 months following training; and 3) Neuroimaging biomarkers of cerebral metabolism, neural plasticity (GABA concentrations) and coherence of functional brain response (fMRI) in default network and functionally relevant brain regions will predict individual response to cognitive training and tDCS.
The current study investigates a method for enhancing cognitive training effects in healthy older adults and improving functional transfer of skills by employing a combined intervention approach targeting facilitation of neural plasticity and optimal learning state. This study specifically examines the impact of pairing cognitive training with transcranial direct current stimulation (tDCS). The present study will provide a unique window into critical mechanisms for combating cognitive decline in a rapidly aging US population.
|Woods, Adam J; Cohen, Ronald; Marsiske, Michael et al. (2018) Augmenting cognitive training in older adults (The ACT Study): Design and Methods of a Phase III tDCS and cognitive training trial. Contemp Clin Trials 65:19-32|
|McLaren, Molly E; Nissim, Nicole R; Woods, Adam J (2018) The effects of medication use in transcranial direct current stimulation: A brief review. Brain Stimul 11:52-58|
|O'Shea, Deirdre M; Langer, Kailey; Woods, Adam J et al. (2018) Educational Attainment Moderates the Association Between Hippocampal Volumes and Memory Performances in Healthy Older Adults. Front Aging Neurosci 10:361|
|White, Tara L; Monnig, Mollie A; Walsh, Edward G et al. (2018) Psychostimulant drug effects on glutamate, Glx, and creatine in the anterior cingulate cortex and subjective response in healthy humans. Neuropsychopharmacology 43:1498-1509|
|Szymkowicz, Sarah M; Woods, Adam J; Dotson, Vonetta M et al. (2018) Associations between subclinical depressive symptoms and reduced brain volume in middle-aged to older adults. Aging Ment Health :1-12|
|Ahn, Hyochol; Suchting, Robert; Woods, Adam J et al. (2018) Bayesian analysis of the effect of transcranial direct current stimulation on experimental pain sensitivity in older adults with knee osteoarthritis: randomized sham-controlled pilot clinical study. J Pain Res 11:2071-2082|
|Ahn, Hyochol; Woods, Adam J; Kunik, Mark E et al. (2017) Efficacy of transcranial direct current stimulation over primary motor cortex (anode) and contralateral supraorbital area (cathode) on clinical pain severity and mobility performance in persons with knee osteoarthritis: An experimenter- and participant-bl Brain Stimul 10:902-909|
|Porges, Eric C; Woods, Adam J; Lamb, Damon G et al. (2017) Impact of tissue correction strategy on GABA-edited MRS findings. Neuroimage 162:249-256|
|Rani, Asha; O'Shea, Andrew; Ianov, Lara et al. (2017) miRNA in Circulating Microvesicles as Biomarkers for Age-Related Cognitive Decline. Front Aging Neurosci 9:323|
|Szymkowicz, Sarah M; Dotson, Vonetta M; McLaren, Molly E et al. (2017) Precuneus abnormalities in middle-aged to older adults with depressive symptoms: An analysis of BDI-II symptom dimensions. Psychiatry Res Neuroimaging 268:9-14|
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