Recently, scientists reported that brief sessions of specialised brain stimulation could reverse the steady decline in working memory, at least temporarily. Illustration: iStock

Anyone above a certain age who has drawn a blank on the name of a favourite uncle, a friend’s phone number or the location of a house key understands (...)

 Neuroscientists have shown that memory calls on a widely distributed network in the brain, and it co-ordinates those interactions through slow-frequency, thrumming rhythms called theta waves. Photograph: iStock

Anyone above a certain age who has drawn a blank on the name of a favourite uncle, a friend’s phone number or the location of a house key understands (...)