Significant overlap between<unk>  and other forms of depression has been observed, though studies suggest that there are differentiating factors within the various pathophysiological models of depression. In the endocrine model, evidence suggests the HPA axis is hyperactive in melancholic depression, and hypoactive in<unk> .<unk>  can be differentiated from melancholic depression via verbal fluency tests and psychomotor speed tests. Although both show impairment in several areas such as visuospatial memory and verbal fluency, melancholic patients tend to show more impairment than<unk>  depressed patients. Furthermore, regarding the inflammatory theory of depression, inflammatory blood markers (cytokines) appear to be more elevated in<unk>  when compared to non-atypical depression.
Atypical depression
Melancholic depression
Outline of bipolar disorder
Anxiety disorder
Transference neurosis
Late life depression
Retarded depression
Treatment-resistant depression