Noninvasive Brain Stimulation on Memory
“Effect of Noninvasive Electrical Brain Stimulation on Memory Performance at Different Times of Day in Younger and Older Adults”
Transcranial Direct Current Stimulation (tDCS) is the safest and most accessible, non-invasive brain stimulation technique available for testing causal links between different brain regions and functions, by manipulating cognitive abilities. By identifying key experimental factors that can improve the reliability and robustness of stimulation effects on cognitive performance in different age groups, this project should lead to the widespread adoption of these design features in future applications. This study will investigate the extent to which tDCS to dorsolateral prefrontal cortex (or dlPFC) impacts recollection accuracy and working memory performance as a function of time-of-day in younger and older adults. Moreover, this study will test the extent that tDCS to dlPFC impacts memory performance by impacting information-specific processes and/or cognitive control processes that operate across different types of information, thereby informing basic theories of how dlPFC contributes to memory in younger and older adults.
Device - Active tDCS
The brain is stimulated for 20 minutes with mild electrical current (maximum 2 mA) with two 7 cm x 5 cm electrodes placed on the scalp, using a standard 1x1 tDCS Clinical Trials device (Soterix Medica, NY), specialized for double-blinding.
Device - Sham tDCS
The brain is not stimulated for 20 minutes with mild electrical current, but instead a sham procedure is administered using a standard 1x1 tDCS Clinical Trials device (Soterix Medica, NY), specialized for double-blinding.
Effect of Noninvasive Electrical Brain Stimulation on Memory Performance at Different Times of Day in Younger and Older Adults