The term of schizophrenia (“schizo” of the Greek “ skhizein ” meaning fractionation and “ phrèn ” indicating the spirit) gathers a whole of psychiatric presenting a common core but very different affections as for their presentation and their evolution. One thus uses plural to indicate them. The schizophrenias are psychiatric pathologies of chronic evolution, generally beginning with adolescence or the beginning from the adulthood. It is not a question of " double-personnalités" as it sometimes is thought. They have as consequences of deteriorations of the perception of reality (Délire), of the disorders cognitive S, and of the social and behavioral dysfunctions more or less important. The term is frequently used, in particular in journalism, to evoke simply contradictory attitudes or remarks.
As of -2000, the Papyrus Ebers in the Book of the hearts list its Symptoms. The Greek literature of civilizations and Roman refer there without indicating how they were treated.
Historically, the psychiatrist Emil Kraepelin is the first to make the distinction between the Dementia praecox described 50 years before him by Bénédict Augustin Morel, and the other forms of madness. It is then famous schizophrenia by the psychiatrist Eugen Bleuler when it became obvious that the designation of Kraeplin is not an adequate description of the disease.
It is in 1898 that Emil Kraepelin, speaking about dementia praecox, finds three variations:
In 1911, Eugene Bleuler uses the term of schizophrenia, and proposes five symptoms:
=== Epidemiology ===
Schizophrenias touch 1% of the world population, without notable variations of a country, culture or one time to another. Heredity is a factor which increases the risk as the genetic luggage increases. Thus, the incipient child sees his risk increasing: 5% if it has a relative of the second degree (uncle, aunt, cousin, cousin) which suffers from schizophrenia; 10% if it has a relative of the first degree (father, mother, brother, sister); 10% if it has a different twin who suffers from schizophrenia; 40% if he is child of two schizophrenic parents; 50% if it has an identical twin who suffers from schizophrenia.
According to certain studies with large scales, they would be more widespread in the big cities. These diseases, which generally appear at old subjects from 15 to 35 years, thus represent an main issue of public health.
The schizophrenia term, introduced initially by Bleuler, means literally: “ spirit cut ”. Associated with the frequent representation in the Anglo-Saxon cinema characters presenting of the multiple personalities, this etymology supports a rather widespread confusion in the general public between schizophrenia and dissociative Trouble with multiple personalities.
In addition, part of press general practitioner has taken practice to associate schizophrenias and behaviors dangerous or Hétéroagressif S. Actually, although it happens indeed that schizophrenic patients have dangerous drivings, that remains relatively rare. The rate of acts of violence is not higher within the schizophrenic population than within the total population. Lastly, the affection is a factor of vulnerability in oneself and it thus exposes the schizophrenes to social violence: the statistics show that the latter have an life expectancy less raised than that of the total population.
The diagnosis of a schizophrenia rests on the observation by the psychiatrist of indirect signs primarily related to dissociation, and thus their setting in prospect with the lived psychic one brought back by the patient. This diagnosis can possibly be supplemented by tests neuropsychological S. It does not exist biological screening test or of medical imagery making it possible to emit a positive diagnosis of schizophrenia. The realization of in particular somatic complementary assessments is essential, in particular at the beginning of pathology, in order to pose the diagnosis, but also during the evolution of the disease.
The diagnostic criteria used can be those of international classifications: DSM and international Classification of the diseases CIM-10. In this case the diagnosis rests on the collection of a list of clinical symptoms which must be joined together so that a person is " qualifiée" of schizophrene; all depends at the same time on the presence and of the duration of some sign S or Symptôme S.Y also intervenes of the subjective elements in a given relational context, thus the bizarrery " interprète" in a relational context where the felt subjective one of the clinician intervenes.
The estimate of the symptoms of schizophrenias as of the other mental affections is always to put in prospect with the social context, family and cultural of the subject. Indeed certain bizarreries, or speeches can for example know a social variability.
Thus, it is banal for the clinicians that references to phenomena which can seem delirious in France can testify to a depression for a subject strongly registered in the Maghrébine culture (of the fact for example of the use of the dialectical Arabic impoverished on the semantic level compared to the language classical Arabic in the chapter of descriptions of the states of heart, as by the influence of Mektoub which can move the culpability apart from the individual sphere).
In DSM-IV, these criteria are:
A) Symptoms caractéristiques' :
Turbid of attention, of concentration, misses tolerance with the effort: The schizophrene takes time to answer the questions, to react to the situations asking for a prompt response. It is not able any more to follow its courses, to concentrate on a film.
Whereas they are presented in first, these symptoms heralding will persist longer than the acute symptoms.
The acute symptoms (positive) usually appear at the beginning of the adulthood, between 17 and 23 years at the men and between 21 and 27 years among women. They are known as “positive” because they are demonstrations which are added to the normal mental functions. It is their presence which is abnormal.
Hallucinations: They are disturbances of generally auditive perceptions (the schizophrene hears a voice which makes comments or utters insults, threats), but sometimes also visual, olfactive or tactile.
The overdrawn symptoms (negative) are observed by a lack or an absence of spontaneous behaviors, awaited.
Insulation, social withdrawal: The schizophrene loses pleasure with his activities of leisures. He forsakes his friends, withdraws himself in his room, becomes even irritable if one tries to approach it. He cuts little by little reality.
One can start to count, for example, five sub-types of schizophrenia:
One can think, as recently Richard Bentall in his book Madness explained: psychosis and human natural , appeared in 2003, that schizophrenia is only one limiting spectrum of the experiment and behavior, and that all those which live in company can have some experiences in their life of them. That is known like the continuous model of the psychosis .
Schizophrenias are characterized clinically by psychic dissociation and the presence, in variable proportion, of Symptôme S known as “ positive ” and “ negative ”. This classification was introduced by Andreassen into the Années 1980. The positive symptoms, thus named because being added to the experiment of reality and the usual behaviors, include/understand the semiological elements common to the states acute psychotics: delirious ideas and Hallucination S, as well as the cognitive disorders gathered under the term of disorganization or disorders of the course of the thought. The negative symptoms are thus named because they reflect the decline of the normal functions and result in a deterioration of the complex cognitive functions of integration: deterioration of the mnemic functions, difficulties of concentration, poverty of the spontaneous language, the driving behavior: abulia, amimy, apragmatism, but also of social or emotional operation: deterioration of the life of relation, abrasement of the affects and motivation (Athymhormie). Because of the great number of possible different combinations between these symptoms, thus leading to varied clinical forms, some schizophrenia as a syndrome, clinical translation of multiple pathologies regard and not like a single pathology.
The psychiatrist Kurt Schneider tried to index the particular forms of the symptoms psychotics which could produce the Psychose S. They are called symptoms of first rank and include/understand the impression to be controlled by an external force, not to be a Master of his thought more, flight of the thought, the echo and comments of the thought, impression that the thought is transmitted to other people, the perception of voice commenting on the thoughts or the actions of the subject, or to have conversations with other voices hallucinated all in all what concerns the mental automatism of G.G of Clérambault.
One can note that several of the positive symptoms or psychotics can intervene in many disorders and not only in schizophrenias. Schizophrenias are different from the other chronic psychoses by the associative relaxation, the diffluence of the psychic processes and the relaxation of the thought, is delirious it itself often fuzzy and is badly organized.
To pose the diagnosis, it is important to seek the manifestations of dissociation. Not to confuse with the term of dissociation introduced by Anglo-Saxon classifications to try to remove hysteria because description " objective" of this last installation problem.
It is also advisable to eliminate from the organic causes for example: In particular toxic (for example: chronic intoxication with the cannabis and its amotivationnelles consequences…), the epilepsy, the presence of a Tumor with the brain, the disorders endocriniens thyroid, just as of other physical affections which cause symptoms apparently similar to those of schizophrenia, the such Hypoglycémie and the Maladie of Wilson. It also should be established clearly that of a bipolar Trouble or of any other psychosis or irrational syndrome it is not a question. Lastly, some personality disorder can be misleading for the laymen or at the beginning of evolution.
One can also distinguish several even intricate rather polymorphic forms coarsely from them:
simple schizophrenia. The negative symptoms are in the foreground: impoverishment of the socio-professional relations, tendency to insulation and the autistic fold in an interior world. There is little or not delirious symptoms. This form evolves slowly but very often to a more and more marked deficit.
According to the DSM-IV-TR, schizophrenia is divided into 5 types:
Standard paranoid: See catatonic Ci-high
It is about a multifactorielle pathology leading to a disorder of a neuropsychiatric nature (deterioration of cerebral and relational operation). It is estimated that it is a mixture of genetic predispositions (tendency family or individual attached to the genome) and environmental predispositions (emotional environment, history and personal trajectory, hygiene of life, marital status, environment or stressing recurring situation), an event significant for the subject and possibly endogenous or of alleviating appearance will constitute a particularly acute kind of Stress and then will play part of release generating the crisis.
One thinks that the first phases of development of the individual are determining, in particular during the fetal stage and at the time of the interaction early with the mother (it is a restrictive interpretation of the latter point which could strongly lead to a speech culpabilisator with regard to the families). One will note, for memory, the place of the Dopamine in the cerebral circuit mesolimbic. The role of the Dopamine in this disease was proposed starting from the observation of the improvement of the delirious symptoms and of dissociation with the use of the Neuroleptique S at the time of their discovery, this wheel intervenes but is only one aspect of a very complex conjunction of factors. Thus the plan neurochimic well of others Neuromédiateur S exploits of the role in schizophrenia such as for example the Sérotonine. Each time a new lighting is related to one of them its implication in the psychic life is greedily explored by the researchers in all the fields of psychopathology, of course.
Statistically, it is observed that at the men the disease is clinically declared during the end of adolescence, whereas for the women that is sometimes later, that the oldest sons or single are statistically more affected. None of these arguments pleads in favor of a genetic cause.
It is noted however that the inheritance of an individual gives predispositions to this disease: on identical twin, in the case of a schizophrenic person, her twin has 40% of risk to be it too. In the same way, the probability of being reached is higher in the event of attack of a case in the same family.
Certain genes were identified as marker of risk, like NRG1 or DTNBP1 .
Certain environmental factors contribute to the release of the disease in particular in the first weeks of the development. This point of view insists on the fact that it is not the order in which the symptoms appear, order very difficult to prove, but the result which can be compared: Without interference of cannabis, the person has 4x less risk to find victim of schizophrenia.
These studies are supplemented by other studies which establish a possible relation between schizophrenia and cannabis, without defining the symptom psychotic as a preliminary but enumerates of them the symptoms for then connecting them to schizophrenia, which can constitute a form of skew. In addition, one belongs to other contradictory studies. It is thus mentioned that the use of the cannabis being in great increase since the Années 1980, if a true correlation existed with schizophrenia, one should have seen the same curve of increase in the diagnoses.
At all events, at present of research, according to the Inserm the use of cannabis thus seems one of the very many factors of causality (neither necessary, nor sufficient) which accompanies occurred by schizophrenia without affecting the favorable evolution of way of it, quite to the contrary these products worsen certain symptoms. Taking into consideration study analyzed by the experts, it appears nevertheless that all the people exposed to the cannabis will not become schizophrenic.
Certain researchers suggest that it is an interaction between environmental factors at the time of childhood and the neurobiologic risk factors which determines the probability of developing schizophrenia with a later age. It is considered that the neurological development of the child is sensitive to elements characteristic of a disturbed social framework such as the trauma, the Violence, the lack of heat in the personal contacts or the hostility. Each one of these elements was identified as risk factor. Research suggested that the favorable or unfavourable effects of the environment of the child interact with the genetic determinants and the development processes of the nervous system, with long-term consequences for the operation of the Cerveau. This combination of factors would play a part in the vulnerability with the psychosis which appears later at the adulthood.
However, this theory is currently regarded as too simplifying and incomplete, in particular owing to the fact that new drugs (atypical antipsychotic ), like the Clozapine, are as effective as the older drugs (or antipsychotic typical), the Halopéridol. However this new class of molecules also has effects on the system of the Sérotonine, and could be one blocking a little less effective receivers with the dopamine. According to the psychiatrist David Healey, pharmaceutical companies would have encouraged too simple biological theories to promote the treatments of biological nature which they propose.
It was believed a long time that the brain of the schizophrenes was of primarily normal appearance. The first indications of differences structural came of discovered from a widening from the cerebral ventricles among patients whose negative symptoms were particularly marked. However, this result hardly proves usable at the individual level because of great variability observed between the patients. A bond between ventricular widening and an exposure to the antipsychotic drugs was suggested.
More recent studies showed that there exist many differences in the cerebral structure according to whether the people present or not a diagnosis of schizophrenia. However, like in the case of the former studies, the majority of these differences are detectable only when one compares groups and not individuals.
Studies implementing neuropsychological tests combined with techniques of cerebral imagery like the Imagery by functional magnetic resonance (IRMf) or the tomography by emission of positons (Mtoe) sought to highlight functional differences in cerebral activity among patients. They showed that these differences more frequently occur on the level of the frontal lobes, of the hippocampus and the temporal lobes. These differences are strongly related to the cognitive deficits frequently associated with schizophrenia, in particular in the field of the memory, the attention, the solution to problem, the executive functions and social cognition.
Electroencephalographic recordings (EEG) schizophrenic people at the time of tasks to dominant perceptive showed an absence of activity in the waveband gamma (high frequencies), who would indicate a weak integration of critical neuronal circuits of the brain. The patients presenting of the intense Hallucinations, the illusory beliefs and a disorganization of the thought also had the synchronization moreover low frequency. The drugs taken by these people did not allow a return of the rate/rhythm towards the frequency band gamma. It is possible that deteriorations of the band gamma and the Working memory are related to deteriorations of the inhibiting interneurones producing acid gamma-aminobutyrique (GABA). One observed in the schizophrenic Cortex préfrontal dorsolatéral of patients a deterioration of a particular subclass of interneurones GABAergiques characterized by the presence of the protein parvalbumine.
See also: the Investigation of Lausanne
A study: longitudinal princeps.
Recently, of the American researchers genetically created the first animal model reproducing schizophrenia, namely a mouse with a gene incomplete DISC1 . That should make it possible to better include/understand the evolution of this disease, and to develop new treatments.
However, the report/ratio INSERM: " Psychotherapy: Three approaches évaluées" (2004), (object of criticisms, inter alia, of Perron and coll on the site of the Psychoanalytical Company of Paris; the answers of Cottraux to these criticisms were published on the site of the AFFORTHECC) reports that two méta-analyzes gathering the work carried out on schizophrenic patients stabilized and followed into ambulatory show little or not effect of psychodynamic psychotherapy or psychoanalysis; and that a study which concerns in-patients (in acute phase) does not highlight of additional effect of the psychodynamic therapy on the medicamentous treatment.
Anthony and Liberman worked out, starting from concepts initially introduced in physical health, a conceptual model of the psychiatric readjustment. They divide into four levels the impact of a serious mental disease as well as the interventions to be implemented:
• Pathology (Pathology): Anomaly or anatomical lesion at the cerebral level caused by a process or agent etiologic. For example an infection, a cerebral tumor or a neurodégénératif process. The investigations of laboratory and in imagery are here of setting.
• Deficit (Impairment): Loss or anomaly of a structure or operation of the brain caused by a subjacent pathology which leads to the deterioration of cerebral operation and the demonstration of symptoms such as be delirious, cognitive hallucinations and disorders. The diagnostic evaluation and of the interventions like the hospitalization, the pharmacothérapie and the therapy cognitivocomportementale are indicated.
• Disability (Disability): Incapacity in the achievement of an activity considered normal for an human being. For example, a deficit on the level of the social abilities caused by the negative symptoms of schizophrenia. When the facets pathology and deficit connected to the acute phase of the disease are stabilized, the psychiatric readjustment and its technologies come into play. It should be mentioned that the readjustment can (and must) begin even if deficits (or symptoms) persist, in so far as they are taken into account in the development of a plan of intervention • Handicap: Disadvantage resulting from a disability which limits the possibility of assuming a role considered as normal for an individual (according to its age, its culture, etc). For example, unemployment, the itinérance. The installation of social programs will support the most complete possible rehabilitation of the person in her various roles
A recent study
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