What does it mean to be in a coma? How can we tell if someone on life support is actually conscious? And how can scientists use synchronised heart rhythms to predict which comatose patients are likely to wake up? In this focus episode of How We’re Wired, join producer Dr Eva Higginbotham as she explores the neuroscience of coma –  from the challenges in knowing for certain that someone isn't conscious, to novel techniques that might help families choose when to cease life support. With special thanks to Marzia De Lucia. How We’re Wired is a Fresh Air Production for The Bertarelli Foundation. Follow now so you never miss an episode. See omnystudio.com/listener for privacy information.