Scientists have been doing an array of regular health checks on the same group of people since they were born in 1946 – the world's longest running cohort study. Now the brains of some of its participants are revealing new insights into the risk factors for Alzheimer's disease. 

We find out more in the first episode of Uncharted Brain: Decoding Dementia, a new series from The Anthill hosted by Paul Keaveny and Gemma Ware from The Conversation.

This episode features Marcus Richards, professor of psychology in epidemiology, UCL, Jonathan Schott, professor of neurology at UCL and David Ward, one of the cohort study participants.

Uncharted Brain is produced by Tiffany Cassidy with sound design by Eloise Stevens. The executive producer is Gemma Ware. Read full credits here.

Further reading:

• We’ve been studying the same people for 76 years – this is what we’ve found out about Alzheimer’s disease