A legendary rock and roll drummer teams up with a neuroscientist to explore the role of rhythm in brain function.

This September, Grateful Dead drummer Mickey Hart exposed his brain to a live audience at the annual meeting of the American Association of Retired Persons (AARP) in New Orleans, Louisiana.

With an electroencephalography (EEG) device strapped to his head, Hart strutted across the stage, drum in hand, as images of the rhythms pulsing through his brain were projected on big screens at the front of the hall. “It was like taking my brain out of my skull and watching it dance,” he says.