Screen Brain - These days most of us are surrounded by screens, be it computers at work and in the home, smartphones, tablets and televisions. But what are the effects of this high screen usage on our brains? We hear from Baroness Susan Greenfield, who claims that such behaviour will have a massive impact on our minds and the ways in which we interact with each other. Plus we gauge the current research taking place in Scotland in this area, which is in its infancy.

Pennie Latin talks to Professor Muffy Calder OBE, Computer Scientist and Chief Scientific Adviser to the Scottish Government. She finds out how Muffy used her computational modelling techniques in the battle against cancer, hears about her work with the Scottish government and her lifelong interest in science, music and the outdoors.

The term 'bipolar' has become common, not least because of celebrities like Stephen Fry and Catherine Zeta Jones being open about the fact that they have been diagnosed with it. But a decade ago, most people had never even heard of it. So what does bipolar actually mean? As part of BBC Radio Scotland's Mental Health season, Pennie Latin investigates the truth behind bipolar, how it manifests itself for people who have it and how scientists are working to try and understand the brains of people with the condition.

Why is it that some people find it easier to live a moderate life whilst others find it difficult to say no to another drink or piece of chocolate? Is there any truth behind the notion of 'an addictive personality'? Pennie Latin investigates the science behind addiction.