Abstract

For the new generation of cognitive neuroscientists, the mind-brain problem is no longer a matter for philosophical speculation; how the mind links with the brain can be studied experimentally. The strength of this belief is demonstrated by a stream of popular science books purporting to show how consciousness emerges from the brain. In contrast, Sean Spence presents a rigorous, modest and wholly admirable discussion of the physiological underpinnings of free will. It is of particular importance that he brings to our attention various phenomena associated with psychotic illnesses. It is generally agreed that schizophrenia has a biological basis. Yet the characteristic symptoms reflect disorders of self-awareness, especially in the experience of free will (delusions of control). It follows that studies of the physiological basis of psychotic symptoms (e.g. Silbersweig et al. 1995) must also increase our understanding of the physiological basis of free will. The test for any discussion of the mind-brain problem from a scientific stance is that it suggests new possibilities for experimental studies. I think a number of the points raised in this essay provide clear starting points for the development of such experiments.