A Clinical and Physiological Relationship between Anxiety and Depression

There has been a great deal of argument during the past 30 years about the symptomatic differences between anxiety and depressive states. Mapother (1926) thought that anxiety states should be regarded merely as one of the numerous sub-divisions of the manic-depressive illnesses, since they merged through a series of patients into agitated depression. Lewis (1966) too saw no sharp division between anxiety states and depression and classified agitated depression and anxiety states together as one sub-division of the affective disorders. Garmany (1956, 1958) and Mayer-Gross, Slater and Roth (1960), however, felt that anxiety states and depression were basically different forms of illness.