The aim of the study: was to search for differences in the EEG dynamics during the treatment of patients with polymorphic and monomorphic subtypes of prolonged/chronic manic-delusional states (PMDS). Patients and methods: two groups of female patients aged 18–45 with polymorphic (42 patients) and monomorphic (34 patients) subtypes of PMDS were identifed. In all patients, before and after the course of treatment, a multichannel resting EEG was recorded with the measurement of absolute spectral power in narrow frequency sub-bands. A comparative analysis of quantitative EEG spectral parameters was carried out. Intragroup differences in mean EEG spectral power values before and after treatment were identifed using nonparametric statistical criteria. Methods: clinical-psychopathological, psychometric, neurophysiological, statistical. Results: in the group of patients with polymorphic PMDS, compared to the group of patients with monomorphic PMDS, the EEG slowdown under the influence of treatment was significantly stronger and more generalized (in the form of an increase in the spectral power of the EEG in the delta, theta 1, theta 2 and alpha 1 frequency sub-bands), reflecting a greater strengthening of neurophysiological processes of inhibition, which is associated with an improvement in the clinical condition of patients, especially in relation to manic symptoms. Conclusion: the described differences in the functional organization of brain activity may mediate the features of the clinical picture and therapeutic dynamics of patients with polymorphic and monomorphic subtypes of PMDS.

Background: resistant schizophrenia, despite the introduction of new antipsychotics and diagnostic methods, still reaches 50%of cases among all patients with schizophrenia. The search for new methods of early diagnosis using personalized genetic analysis tools seems relevant and promising at the present time. The aim of the study was to analyze the associations of polymorphisms COMT rs4680, DRD3 rs6280, BDNF rs6265 with the development of a therapeutic resistance in patients with schizophrenia. Patients and methods: а real-time genetic analysis of 264 patients with schizophrenia examined by clinical and psychometric methods. A prospective follow-up for 6 weeks was carried out with further division of the sample into 2 groups: respondents and patients with resistance based on the evaluation of the effectiveness of psychopharmacotherapy. Results: a significant association with the ineffectiveness of psychopharmacotherapy found in patients with schizophrenia being homozygotes in the recessive model and being heterozygotes in the codominant model of the rs6265 polymorphism of the BDNF gene. Conclusions: the rs6265 polymorphism of the BDNF gene can be considered as a diagnostic marker for the development of treatment resistant schizophrenia, but requires further study to confirm sensitivity and specificity.

Background: brain structural peculiarities in different mental disorders are neurobiological indicators that are extremely important both for understanding of the diseases’ pathogenesis and for identifying potentially valid prognostic markers. The aim of this pilot study was to identify the range of brain morphometric parameters in the group of patients with schizotypal disorders with catatonia syndrome. Patients and methods: 33 patients with schizotypal disorder and 33 age-matched mentally healthy subjects underwent high-resolution structural MRI on a 3T Philips Ingenia scanner. Results: there were found widely distributed intergroup differences in form of the smaller gray matter thickness. In this spectrum, a morphometric abnormality of the precentral gyrus, an area of the primary motor cortex localization, previously not noted in the literature on schizotypal disorder, drew special attention. In addition, smaller volume of the nuclei accumbens (included in the processes of choosing actions) was found. Conclusions: this pilot study allowed to reveal some brain elements of the mosaic presumably associated with the manifestation of catatonia syndrome in schizotypal disorder.

Background: the important role of social factors in the development of mental disorders has long been known, but recently, due to the growth of mental disorders, including against the background of various global social crises, it seems necessary to summarize already existing knowledge in this field, as well as to consider new trends in the influence of social factors on the occurrence, course and prognosis of mental disorders.  The aim of review  was to analyse domestic and foreign studies on the influence of various social aspects of mental disorders in order to rationally solve clinical, diagnostic, therapeutic, rehabilitation and organizational problems. Material and methods:  the authors used the key words “social factors and mental disorders”, “risk factors for mental disorders”, “family factors in severe mental disorders”, “impact of disasters (man-made and natural) on mental health”, “network theory of mental disorders”. The authors selected available publications in MEDLINE/PubMed, Scopus, eLibrary,  RSCI, Google Scholar, as well as relevant articles in the source lists of the reviewed papers.  Conclusion: the role of childhood and adolescent mental trauma in the etiopathogenesis of mental illness in adulthood is an object of many studies. The increase of social disasters cases (both natural and man-made) is reflected in the detection of PTSD. Family factors are considered of enormous importance and could have both favourable and negative effects. The gender-specific influence of social factors is more attributable to cultural differences, as well as to marital status, including the lower self-esteem of single women. Biopsychosocial model despite its widespread proclamation is underused in practice, which reduces the effectiveness of comprehensive therapy. First proposed in 2008, the network theory of mental disorders is rapidly evolving and is now a full-fledged  field of psychiatric research.

Background:  schizophrenia is considered as a dysconnectivity disorder supported by neuroimaging studies have revealed altered myelination of white and grey matter. Altered myelination suggests oligodendrocyte (OL) family pathology. Oligodendrocyte progenitors (OP) are of special interest since they myelinate axons in mature brain at the last stage of the differentiation. The aim of review  —  to summarize modern research data concerning altered cell cycle of OL family in schizophrenia and their plausible reason. Material and methods: using the keywords “schizophrenia, OL, OP”, “OP and schizophrenia risk genes”, “OP and neuroinflamation”, “OP and antipsychotic drugs”, “OP, dopamine, serotonin” 164 studies concerning the influence of listed above factors on OP differentiation were selected the MedLine/PubMed, Google Scholar, eLibrary databases for analysis.  Conclusion: postmortem studies demonstrated essential deficit of OL family cells as well as altered correlation pattern between the number of these cells suggested altered OP differentiation. Some of OL and myelin-related gene variants caused higher schizophrenia risk play a critical role in OP differentiation. While neuroinflammation is important component of schizophrenia brain pathology proinflammatory cytokines and activated microglia exert substantial influence on OP proliferation and differentiation. Atypical antipsychotics are able to correct OP maturation and have anti-inflammatory effects. OL and OP as well as microglia and peripheral immune cells express dopamine and serotonin receptors, main  therapeutic targets of these drugs. OP pathology as important component of schizophrenia  pathogenesis, tightly linked with another abnormalities, and considers as promising target for future therapeutic strategy.

Background: despite the widespread opinion that psychoses are common after surgery in neurosurgical patients, they remain practically unexplored to date.  Objective: based on the analysis of scientific literature to get an idea of the state and prospects of studying the problem of psychoses arising after operations for brain gliomas.  Materials and methods: the work is a scoping review; the main method used was the search for publications by the keywords “postoperative psychosis”, “postoperative delirium ”, “brain gliomas”, “neurosurgery”, “craniotomy” conducted in the Medline/PubMed, Scopus, Web of Science, RISC and other sources over the past 20 years.  Conclusion: studies of postoperative psychoses in patients with brain gliomas and comparison of results in neurosurgery and general surgical practice are hindered by terminological dissonance and shortcomings of various types of verification of postoperative psychotic disorders. This manifests itself both at the epidemiological data (the probability of occurrence ranges from 4 to 29%), and in determining the risk factors necessary and sufficient to predict the onset of psychosis: according to literature data. About 80 indicators claim this role (gender, age, premorbid diseases, preoperative mental state,  tumor malignancy, options for neurosurgical interventions, etc.) while the list does not contain conceptually important features, such as the profile of individual brain asymmetr y, tumor lateralization, etc. These problems lead to controversy in approaches to treatment and prevention of postoperative psychotic disorders. Before evaluating the effectiveness of the main drugs (dexmedetomidine, GABA-ergics, antipsychotics, etc.) and non-drugs influences, one must understand the phenomenon clearly with all the individual characteristics and variants of disease manifestations.

Background:  frontotemporal dementia (FTD) is a group of neurodegenerative diseases, with onset usually in presenile age, the clinical picture is manifested by behavioral disorders and relatively intact cognitive features in the initial disease. In  the early stages of FTD, it is difficult to differentiate this type from other dementias or other mental diseases. The  aim was to analyse recent scientific publications on the problem of differential diagnostics of frontotemporal dementia.  Material and methods:  using the keywords “frontotemporal dementia”, “frontotemporal lobar degeneration”, “differential diagnosis of frontotemporal dementia”, “behavioral variant of frontotemporal dementia”, selected and analyze publications for the last two decades. Results: the behavioral variant of FTD (bv-FTD) is the most common form of FTD, accounting for 50% of all cases of FTD, and especially in cases with early onset. Predominantly, this variant of FTD presents diagnostic difficulties, due to the limited accuracy of neuroimaging examinations and the lack of specific biomarkers. The clinical symptoms of bv-FTD are characterized by considerable overlap with symptoms of neurodegenerative diseases and mental diseases, such as schizophrenia, bipolar affective disorder, obsessive-compulsive disorder, and personality disorders. Conclusion: the diagnosis of FTD at the initial stage of the disease is problematic and difficult, the sensitivity and specificity of almost all diagnostic methods increase as the disease progresses. This literature review highlights some of the diagnostic methods that can be used in suspected cases of FTD and informs about the differential diagnostics recommendations that have been developed to improve the accuracy of FTD diagnosis.