Using electricity to precisely stimulate the brain can boost people’s working memory, a study suggests. A group of 60 to 76-year-old adults underwent personalised transcranial alternating current stimulation (tACS), followed by a memory test. The result was a rapid improvement in working memory performance, accompanied by functional brain connectivity changes in the individuals who received the non-invasive stimulation.
Improving local and long-range connectivity within the temporal cortex instantiated as restored theta-gamma coupling, and theta synchronisation across the fronto-temporal regions was the key to the observed improvement, according to the researchers. More information about this study can be found on the BBC News website or via Nature Neuroscience