[Core symptoms of depression. Effectiveness of antidepressant therapy].

Core symptoms of depression are a combination of psychological and somatic symptoms, often associated with psychomotor and cognitive disturbances. The diagnostic classifications of depression include the concepts of melancholic, endogenous, or severe depression. All subgroups describe severely depressed patients suffering from most of the core symptoms of depression. In addition these patients exhibit the clinical characteristics of a recurrent unipolar or bipolar course, lower placebo response rates, or higher response rates to ECT, to antidepressant treatments with dually or mixed modes of action, or to lithium augmentation. Higher rates of HPA axis hyperactivity and specific EEG patterns may also occur in this patient group. This suggests a broad overlap of patient subgroups within the diagnostic classification of depression. Because the positive diagnosis of the core symptoms of depression may include clinical consequences, it would be useful to integrate all these concepts into the upcoming new versions of the diagnostic systems DSM-V and ICD-11.