1. The view was expressed that behavioral effects of somatic treatment must occur within the context of lawful stimulus-response relationships.2. The hypothesis was suggested that certain changes in the internal environment are included in the stimulus conditions which elicit emotional response and that somatic treatment procedures may change emotional behavior by changing the stimuli which elicit emotional responses.3. Specific, testable predictions were derived from this theoretical point of view, and a limited number of animal experiments were discussed in relation to these predictions.4. Possible practical applications of this point of view were suggested and discussed.