The Thirtieth Maudsley Lecture: Perception and Imperception

Abstract

I value very much the honour of giving the Maudsley Lecture. Henry Maudsley was a pioneer in the study of the physiological basis of mind, and hence of the physiological interpretation of mental disorder. In the preface to his book, The Physiology of Mind (Maudsley, 1876), he said with a blend of optimism and modesty: “The current of psychological thought having set so strongly in physiological channels, it is pretty certain that the reflections which one person has had, however original they may seem to him, some other person has had, has now, or will very soon have.” But half a century was to pass before physiology and psychiatry began to develop techniques which could illuminate the physiological basis of mind, and even now we are only entering the era which Maudsley would have found the fulfilment of his hopes and anticipations. Though intolerant of the idea that metaphysical speculation about mind could take the place of scientific study, he was nevertheless a philosopher, and my aim in this lecture is to try to use a philosophy of perception to interpret the clinical observations of perceptual disorder.