Comparative characteristic of influence of intense psychotraumata of various natures (on example of ecological catastrophe and combat stress

536 liquidators of the accident on ChAPS and 154 combatants have been examined. Comparative analysis of psychotraumatizing situations associated with stress of radiation catastrophe and combat stress has been carried out. In all patients after impact of small doses of radiation mental disorders of organic spectrum have been revealed, in a part of liquidators - posttraumatic stress disorder, in all patients some criteria of these disorders have been found. Discordance between degree of severity of these disturbances and intensity of radiation impact has been revealed what is conditioned basically by social-stressful influences. In all combatants posttraumatic stress disorder was diagnosed. Analysis of perception of psychotraumatizing factors in both groups has been carried out; mechanisms of radiation and combat stress have been compared. Perception of ecological danger under conditions of impact of small doses of radiation depended not on real threat but on subjective image of it. After return from Chernobyl liquidators have been exposed to secondary stressogenic factors, which according to mechanism of formation of posttraumatic states were associated with participation in liquidation works, conditioned lingering severe psychotraumatizing situation and determined adverse dynamic of diseases. In combatants traumatic disorders flew more favorably, traumatic experiences carried more specific character, to lesser extent social relationships were destructed what allowed more effective using personality resources of sanogenesis.