Interesting correlations are made between patterns of movement of lower forms of vertebrate life, of the normal human infant, and of persons with cortical injury

and disease. The studies have been applied to the rehabilitation of spastic paraplegics and others. By utilizing primitive reflexes still available after loss of cortical control, patients may learn to coördinate like a dinosaur or feed like an amphibian. The greater freedom of action and independence and the dignity of upright posture thus attained are primitive satisfactions but they are valid and potent motivations for the laborious process of rehabilitation.