The article presents the results of the analysis of the most fundamental – spatial-temporal – mechanisms for the formation of the atypical nature of the clinical picture of affective disorders. They consist of additional infringements of the speed of movement of patients‘ individual time, which are already present in typical disorders of the individual time, which determine the occurrence of qualitatively different clinical symptoms and make them more heavy. Partial acceleration or inhibition of the initially disturbed course of an individual patient‘s time while maintaining its main direction causes desynchronization of changes in the components of the affective triad, resulting in their separation. Frequent and even more – extremely frequent changes in the patient‘s individual time vector primarily lead to increasing of the somatic effects of physical overload, depletion of the body‘s energy resources and pronounced disturbances of the sleep-wake cycle. With all the atypical disorders, there is a greater difference than with their typical prototypes, the inconsistency of the individual space and time of the patients with the world spatial and temporal processes, which excludes the normal mental functioning and vital activity of the patients.
Since the processes of the same object that are multidirectional in time and space never intersect anywhere, the manifestations of atypical affective disorders can not be the result of mixing of opposite pole clinical symptoms. This casts doubt on the legality of the existence in the ICD-10 subheadings describing mixed affective disorders. In the new classifications of mental disorders, it is preferable to create a separate rubric devoted to atypical affective disorders, or assignment to “Others” disorders without defining them as mixed.

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