Cause-effect Relationships Between Brain Networks and Bimanual Coordination in Older Adults

In this study, high-definition dual-site transcranial alternating current stimulation (i.e., non-invasive brain stimulation) will be applied to boost the fronto-parietal network during a bimanual coordination task in healthy young and older adults. Previous studies indicated that this network is important in initial motor learning, possibly through its role in spatial working memory. Therefore, stimulation will be applied during both a pure spatial working memory test, and during a bimanual coordination task. It is also shown that healthy older adults do not engage spatial working memory brain regions during motor learning, which is related to worse motor learning. Therefore, the investigators will investigate whether this type of stimulation can improve bimanual motor learning in healthy older adults.