INTRODUCTION This considerably condensed version of a speech given by Dr. Cohen, currently at the Zieger/Botsford Hospitals, Southfield, Michigan, is a nice discussion of the sensory systems in our bodies which tell us where the parts of the body are in relationship to each other, how they are moving, and how the body is aligned relative to the direction of the force of gravity. The paper is a good refresher for rolfers, emphasizing the diversity and interrelationships of perceptual motor activity systems and their functional importance to the well being of the whole person.Several points seem particularly relevant. One is the emphasis on the crucial role played by the receptors in the connective tissue around joints in performing coordinated movements. Another is the discussion of the great and somewhat overlooked importance of receptors in the neck, based on Dr. Cohen’s experiments with monkeys. The discussion of reflexes also is very interesting, especially the presence of reflex stimulated muscle activity even in the absence of obvious movement, as though from remnants of our evolutionary past. Reflex activities seem to me deserving of further research for rolfers. The complete original paper, with figures and references, is available through the editorial office of the Bulletin. – Lloyd Kaechle, Ph.D.