In the last twenty years doctors and scientists have developed electronic machines to probe the secrets of the human brain.
How do these machines work? What information can they give about human thought and personality? What light can they-throw on the mysteries of sleep and memory? What is a 'brain-print'?
These and other questions are discussed by Dr. Grey Walter, a world-famous figure in this work, when television cameras visit his laboratories to watch experiments in progress.
From the Burden Neurological Institute, Bristol.