2. Physiological - We will use biosensors and bioharnesses to gather electrocardiogram (ECG) data in order to test the complexity loss hypothesis. This hypothesis states that the physiological responses of organisms under constraints (ageing, illness, stress) exhibit grossly reduced dynamics and lose the ability to adopt to the changes in the environment. We will examine whether patients exhibit these reduced dynamics as their operation approaches and whether the arts can be used to increase the complexity of their responses.