Progress in Physiological Psychology, Volume 3 reviews major advances in the field of physiological psychology and includes neurological and physiological treatments of sleep, information storage, and hibernation. The mechanisms underlying sensorimotor integration during sleep are highlighted, along with central nervous control over the physiological regulation of hibernation. This volume is comprised of four chapters and begins with a discussion on changes in sensory and motor physiology that occur during sleep, with emphasis on postural reflexes and motor activity as well as transmission of somatic sensory volleys through spinal reflex pathways. It then looks at the role of neuronal membranes in the storage of information in the central nervous system, along with hibernation and its relationship to neurological mechanisms involved in temperature regulation and motivation. The final chapter focuses on the effects of removing striate cortex on residual vision in monkeys. This monograph will be of interest to neurophysiologists and psychologists.