"And I often notice that someone seems to have replaced me"
Understand what Kapgra syndrome is like, allows watching television news regularly spilled onto the spectators' heads. In them, increasingly, with chilling details tells how a quiet American clerk suddenly shot his entire family and shot himself in the final of the drama.
What is suddenly found on hardworking and accommodating worker, diligent church parishioner and exemplary family man?
The near service environment, as a rule, describes zeal and sincere devotion to the artist's company with eyes permanently rested on the computer monitor, but responding at the first call and absolutely conflict-free.
Yes, was an indispensable participant in all corporate parties, where only one can learn about the inside of the life of an eternally busy colleague. It is these moments of being in a state of dosed and permitted relaxation and are key to understanding the cause of the tragedy.
Employees suddenly begin to remember the vague hints of a colleague that now his life is no longer his. That it is increasingly intervening some mysterious, separate from him, the existing personality, who is doing his big and small deeds on his behalf.
No, it is not a figment of the imagination - it is an embodied and effectively( negatively effective) acting entity. Most likely, a twin brother who is not looking for rapprochement, but probably avenging his more successful half by undermining the foundations of her well-being.
All failures in family and production are the result of the intervention of an elusive, fast decision-making and operating double. 
It is no longer possible to do anything with the existing situation to the victim. For the revenge of the evil twin is becoming more sophisticated, the actions are disarming, and the consequences of the damage caused are catastrophic, both materially and morally. There is only one way out of the situation - death.
But why, as a result of such a case, the whole family dies, including those who came to stay with distant relatives?
And how else does the persecuted understand whose mysterious evil double acts if his deeds are that of a woman's refined and feminine revenge, then the senile rectilinear dubolism of his father-in-law, the childish inconsistency of his daughter, the far-away effectiveness of his son-in-law? Hence, under the suspicion falls and the whole family of twins subject to extermination.
How to calculate the next potential killer for people engaged exclusively in themselves and their incredibly confused lives by the same owners? No way.
This can only be done by a specialist psychiatrist, it is not everyone who has the "cockroaches in the head" who can decide for help.
As an evil clown, he changed his personalities and beat them all at once, without a reason.
Although the number of personality twins in psychiatry can not be counted, the Kapgra syndrome is quite specific.
This is either an autoscopic double - a mirror image of all personality traits, but with a minus sign, or an invisible double, successfully hiding behind the outer appearance of one of the family members.
The first category of disorders is the negative thoughts and subconscious motivations of the patient embodied in the actions, allegedly performed by his mirror double. That is, in an environment where the patient has pity and sympathy, a non-existent twin has only cruelty and cold calculation, and so on, all traits of character, but exactly the opposite.
Variations of the invisible double mean someone else's guilt in the hand-made effect. The action produced by the person is unknown, but quite specific. This is actually the nonsense of Kapgra.
In any of the options there is a physically real person, to which the patient can dump his unconsciously produced destructive actions. They can be both the properties of a physical( split vase) and moral-moral( slander, appropriation of someone else's intellectual property).
Unlike the delusions of a positive double with the recognition of persons well-known in outsiders, the delusion of a negative double is aggressive towards people in the inner circle, with their own negative intentions embodied in reality.
And finally I'll say
The often ending tragedy of the finale of delusional disorder Kapgra has the previous symptoms of a disorder with a classic increase in the psychiatric "splitting of firewood".
So, the wife, confident in the substitution of the husband for the impostor-twin, at first only refuses to share with him a couch. Then completely evicts him from the bedroom, at night locked in the key. Finally, more and more convincing himself of his "rightness", he launches the weapon of murder.
It is characteristic that the other members of the family do not hate her - all this time she recognizes them and gets along very well with them. 
Another variation is the behavior similar to the nannies of the nanny parent: to say that it was not you who broke the vase, but the cat - there will be demand from it!
All the "firewood" that "pricked" the patient, they are written off to someone else's hands and thinking abilities. Most often there is a mythical twin, thrown by parents in a deep childhood, and now - a vengeful adult, acting, using similarities in the face, while all the bumps fall on the "innocent"!
In addition to the subconscious hatred and fear experienced by the patient in relation to the object of the charges - delusions of a negative double, the phenomenon of prosopagnosia, or facial agnosia, is important for the pathology clinic.
Due to the existence of this phenomenon, completely unknown persons are often perceived by the sick as related( delusions of a positive twin), and closely related - on the contrary, as strangers. The constant presence of the latter in the field of view is perceived as a dangerous pursuit by intrusive people who unreasonably claim their rights for time, attention and other spiritual and physical values of the sufferer of the disease.
Etiology of
Syndrome The reasons for the lack of emotional response to familiar faces, while persons perceived as unfamiliar, include mental automatism, can serve:
- paranoid schizophrenia;
- acute psychosis;
- neurological disorders that led to the appearance of prosopagnosia due to the presence of pathology in the right lower-occipital region( especially with the involvement of the parietal and temporal lobes in the outbreak of the adjacent areas).
To the second group of reasons, both neuroinfections and their consequences, as well as the outcomes of somatic diseases, injuries, intoxications, leading to damage to these areas can be considered.
About diagnosis and treatment of
Given the rather serious shifts in the thinking and behavior of the patient, the diagnosis of the syndrome is not particularly difficult: the patient honestly talks about his suspicions and is angry when he feels that he is not believed.
The exception is when the patient is sure that the psychiatrist is in collusion with the insidious double. In this variant, you should think about the Kapgra syndrome associated with schizophrenia.
Treatment of a pathology based on schizophrenia is quite realistic. It includes the use of drugs that eliminate anxious-suspicious stress, and is able to quickly stop the acute condition.
In the case when Caprusa's delusions( also called delusional identification) are triggered by a brain injury, the brain is given time for self-restoration of its normal functions - the patient is only under the supervision of a psychiatrist.
In all other cases, including children's experiences that left trauma, complete healing is problematic, especially in cases where the sensations that are experienced give the patient a negative pleasure from their existence - the patient does not contact and cures treatment.
In most cases, the use of antiepileptic and strength-strengthening drugs, neuroleptics, as well as cognitive methods, including reframing techniques, which help to rethink the reality and reorganize the perception, leading to the elimination of flawed mental patterns, can restore mental health in a period of 10-12 weeks toseveral years. 
Due to the patient's sanity and its obvious danger to society, all possible persuasion measures should be applied to the course of special treatment. After the first successful results, the patient experiences considerable relief and is more willing to cooperate.
In cases of stealthily moving or avalanche-like delirious identification, psychiatric help may be late. And then millions of viewers of TV news release will learn about the victims of the next shooting.
To shudder in the evening with horror, in the morning again go deeper into the work, not noticing what is happening with the neighbor in the office.
