The body image, which is of basic importance in ego functions, can be studied neurologically as well as analytically. For example, the responses of individuals to double simultaneous cutaneous stimuli (on face and hand, or other combinations) can, under certain conditions, help us to reconstruct early, and even earliest, stages of ego development. These primitive stages are revealed in the course of regression caused by organic disease of the brain. The 'extinction' and 'displacement' of one of the stimuli, the other being dominant in a fixed hierarchal sequence, apparently really represent a fusion of stimuli. The patient, now in a state resembling very early infancy, confuses face and hand and fails to distinguish between them. That the face, breast, and hand are fused into a single, homogeneous primordial cluster is strongly suggested also by figure drawings. Analytic theory regarding early ego development finds corroboration in these data.