Factor models of the Kolmogorov–Sinai entropy indicators of EEG in adolescents with depression

t Introduction. According to the WHO, there is currently an increase in the prevalence, incidence and rejuvenation of depression. This phenomenon is also observed in adolescents. Purpose of the study. Search for sensitive and specific «markers» of depressive disorder in adolescents, which not only make it pos-sible to distinguish between patients and healthy people, but will also be able to assess the effectiveness of different types of treatment. The contingent of the surveyed. Research methods. Examined: 1. Group of adolescents with depression: 52 patients (35 girls and 17 boys). 2. Control group (healthy) — 40 adolescents (18 girls and 22 boys). 3. The EEG was recorded in a state of calm wakefulness and during mental stress. 4. EEG analysis — qEEG software complex — NeuroResearcher®InnovationSuite (MI&T Institute, Ukraine). The entropy of Kolmogorov–Sinai EEG was calculated — a nonlinear indicator of the state of neurodynamics in the studied EEG electrode placement. 5. Multivariate statistical analysis. Factor analysis was used to create the models (STATISTICA, 13.3). Results. The search for objective quantitative «markers» of the depressive state of both sexes adolescents was carried out on the basis of nonlinear EEG analysis and the creation of factor models of the results obtained. The factorial models of the Kolmogorov–Sinai EEG entropy of the studied areas of the cerebral hemispheres of sick and healthy both sexes adolescents in a state of calm wakefulness and during mental test were obtained. A physiological interpretation of the identified main factors is given. Comparison of factor models made it possible to identify differences between depressed and healthy adolescents, as well as gender differences. Differences in the factor models of the EEG pacemaker parameters were also revealed in depressed adolescents in a state of calm wakefulness and during mental stress. Based on the obtained factor models, it is possible to calculate the individual values of the factors for each pa-tient. This allows to determine the individual severity of the studied pathology. The revealed significant differences in factor models in adolescents of both sexes with depression in comparison with factor models of adolescents in the control group can be used to detect depressive disorder during EEG examination. Key words: Depression in adolescents; EEG; Nonlinear EEG analysis; Kolmogorov–Sinai entropy; Factor analysis.

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Evaluation of Functionality in Families with Depressed Patient by Using the FFS - Poster Prezentation

European Psychiatry ◽

10.1016/s0924-9338(09)70887-9 ◽

2009 ◽

Vol 24 (S1) ◽

pp. 1-1

Author(s):

T. Maria-Silvia

Keyword(s):

Major Depression ◽

Depressive Disorder ◽

Positive Affect ◽

Psychiatric Patients ◽

Normal Families ◽

Control Group ◽

World Population ◽

Dsm Iv ◽

The Individual ◽

Family Functionality

Depression is a disorder of representation and regulation of mood and emotion; it affects 5% of world population, in a year. Unlike normal loss and sadness feelings, major depression is persistant and it interferes significantly with thoughts, behaviour, emotions, activity and health of the individual. If untreated, depression can lead to suicide. Using family therapy in treating psychiatric patients is a must due to the significance that a family holds in individual and society life.Objective:Assesing family functionality in families with a member diagnosed according to DSM IV TR with depressive disorder; depression intensity was assesed with HDRS.Methods:A sample of 3o families (71 members); FFS assesses the most important and consistent five functioning areas: positive affect, comunication, conflicts, worries and rituals.Results:Values obtained in each of the 40 questions of the scale can give information on variables affecting the increase or decrease in subscales values. Positive affect 35,07, communication 37, conflicts 15,11, worries 40,77, rituals 45,03. The reuslts were compared to those obtained by assessin normal families from a control group of 132 families (323 members).Conclusions:Differences were noticed. Values obtained in our study represent the standard of functioning of families with a depressed member.

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Effect of short-term mental stress on time- domain indices of heart rate variability in obese individuals – A case- control study

Biomedicine ◽

10.51248/.v41i2.795 ◽

2021 ◽

Vol 41 (2) ◽

pp. 274-277

Author(s):

Priya S.A. ◽

R. Rajalakshmi

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Neuronal Activity ◽

Time Domain ◽

Mental Stress ◽

Mental Arithmetic ◽

High Body Mass Index ◽

Control Group ◽

Stress Task ◽

The Individual

Introduction and Aim: Mental stress may impact dramatically on dynamic autonomic control on heart. Many studies have demonstrated association of high body mass index (BMI) with greater risk for cardiovascular disease with disturbance in autonomic neuronal activity. Analysis of Heart rate variability (HRV)during acute mental stress assesses the autonomic status of the individual. Hence, we aimed to study the effect of acute mental stress on time domain measures in obese adults. Materials and Methods:Sixty male volunteers of 30 each in study group (obese individuals) and control group (non-obese individuals) were recruited for the study. A basal recording of ECG in lead II was done on all the individuals. Then they underwent mental arithmetic stress task for 5 minutes during which again ECG was recorded. The change in time domain measures of HRV during rest and stress task was analyzed and compared between both the groups. Results: Analysis of time domain measures of HRV revealed a statistically significant increase (p ? 0.001) in mean heart rate in both obese and non-obese individuals, while rMSSD(root mean square differences of successive RR interval) and SDNN (standard deviation of all NN intervals) showed a statistically significant (p? 0.001) decrease in obese individuals and non-obese individuals did not show any statistically significant change during the mental stress task. Conclusion: In response to acute mental stress there was increased heart rate in both the groups. But the autonomic neuronal activity differed by way of sympathetic dominance in non-obese individuals and parasympathetic withdrawal in obese individuals.

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Character and Temperament Dimensions in Subjects with Depressive Disorder: Impact of the Affective State on Their Expression

Open Access Macedonian Journal of Medical Sciences ◽

10.3889/oamjms.2017.012 ◽

2017 ◽

Vol 5 (1) ◽

pp. 64-67 ◽

Cited By ~ 1

Author(s):

Stojan Bajraktarov ◽

Antoni Novotni ◽

Slavica Arsova ◽

Dance Gudeva-Nikovska ◽

Viktorija Vujovik

Keyword(s):

Depressive Disorder ◽

Personality Traits ◽

Affective State ◽

Personality Factors ◽

Control Group ◽

Novelty Seeking ◽

Individual Personality ◽

The People ◽

The Individual ◽

The Impact

BACKGROUND: The depression is a cross-cultural condition that occurs in all cultures and within all nations with certain specificities, even though there are some differences in its manifestation. The hereditary load is of major importance, but also the individual personality factors, in the form of risk factors, are associated with the occurrence of depression. Personality characteristics have a significant impact on the occurrence of the recurrent depressive disorder and the outcome of the treatment as well.AIM: To identify the specific personality traits in people with the recurrent depressive disorder and the impact of the affective state on them.METHODS: Three questionnaires were used: a general questionnaire, Beck's scale of depressive symptoms, and TCI-R (inventory for temperament and character).RESULTS: The most indicative differences in the dimensions are found in the Harm avoidance and the Self-direction dimensions, and most variable dimensions dependent on effective state are Novelty seeking and Reward dependence.CONCLUSION: The people with the recurrent depressive disorder have a different profile of personality traits (temperament and character) compared with the control group, and their characteristics depend on their current affective state.

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PSYCHOPHYSIOLOGICAL ASPECTS OF ADAPTATION IN FOREIGN STUDENTS WITH WEAKENED HEALTH

Психология. Психофизиология ◽

10.14529/jpps200111 ◽

2020 ◽

Vol 13 (1) ◽

pp. 95-101

Author(s):

Elena Anatolevna Milashechkina ◽

Irina Nikolaevna Gernet ◽

Vitalii Sergeevich Milashechkin

Keyword(s):

Health Status ◽

Foreign Students ◽

Male Students ◽

Control Group ◽

Orthostatic Test ◽

Software Complex ◽

Individual Minute ◽

The Individual ◽

Functional Capacities ◽

Experimental Group

Background: About 40% of foreign students from 150 countries of the world study at the Peoples' Friendship University of Russia. Unusual environment, other sociocultural traditions, climatic and geographic factors, time-related changes make special demands on the adaptationof foreign students. It is especially difficult for students with health status deviations. Aim: The article aims to assess the psychophysiological parameters of adaptation in foreign students with impaired health status. Materials and methods: The study was conducted on the basis of the Peoples' Friendship University of Russia. Male students aged from 18 to 19 years participated in the study. All students belong to a special medical group for health reasons and are divided into two groups: the control (Russian students, n = 28) and experimental (foreign students, n = 35) groups. To assess the psychophysiological features of adaptation, the indicators of response to light and sound stimuli were used, as well as the test of maximum oxygen consumption, the duration of individual minutes, and the orthostatic test conducted with the help of Sports psychophysiologist hardware and software complex (no. 2010617789). The obtained data were subjected to variational and statistical analysis using the Microsoft Excel 2010 and SPSS (version 19.0 for Windows) software. The survey was conducted with the written consent of the students. Results: Significant differences in simple sensorimotor response to light and sound stimuli were revealed in foreign students compared to Russian students (P ≤ 0.05). Also, more than half of the students from both groups had a low level of physical performance. However, males from the experimental group were characterized by lower values. The duration of the individual minute in foreign students with health status deviations is much shorter than in students from the control group. There were no significant differences in the data btained in the orthostatic test. Conclusion: In males of both groups, pathological processes are characterized by a decrease in the functional capacities. However, most psychophysiological parameters are worse in foreign students. This indicates a decrease in the adaptive capacity of students from the experimental group and indirectly indicates the imbalance in the psychophysiological status.

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Averaged Chain Substitution Method – Applicability, Advantages, and Disadvantages

Economic and social alternatives ◽

10.37075/isa.2021.2.08 ◽

2021 ◽

Vol 27 (2) ◽

pp. 127-138

Keyword(s):

Factor Analysis ◽

Factor Models ◽

Substitution Method ◽

Individual Factor ◽

Advantages And Disadvantages ◽

Business Analysis ◽

The Individual ◽

Analytical Expressions ◽

Determinant Factor

The article presents the applicability, advantages and disadvantages of the methods of determinant factor analysis, which are employed most commonly in practice for the needs of financial and business analysis. The averaged chain substitution method is developed and tested for approval for all possible combinations of factor models comprising two, three, and four factor variables. Analytical expressions are derived for the quantitative determination of the individual factor influences of the participating factor variables over the variation of their result indicator. It is characterized by universality and eliminates the only significant disadvantage of the chain substitution method, namely the ambiguity (non-accuracy) of the results obtained thereby regarding the quantitative measurement of the individual factor influences of the participating factor variables exerted on the variation of the result indicator when changing the order of substitutions of the factor variables in the construction of factor chains. The objective of the present study is to reveal the applicability, advantages, and disadvantages of the methods of determined factor analysis and to present the results of the approbation of the averaged chain substitution method for all possible combinations of factor models composed of two, three, and four factor variables.

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The Correlations of Suicide Attempts in Major Depressive Disorder

European Psychiatry ◽

10.1016/s0924-9338(09)70897-1 ◽

2009 ◽

Vol 24 (S1) ◽

pp. 1-1

Author(s):

S. Nastase ◽

D. Ivanovici ◽

M. Vrabie ◽

I.M. Dumitrescu ◽

A. Mihailescu

Keyword(s):

Major Depressive Disorder ◽

Depressive Disorder ◽

Suicide Attempts ◽

Individual Characteristics ◽

Categorical Variables ◽

Control Group ◽

Major Depressive ◽

Historical Case ◽

Suicidal Attempts ◽

The Individual

Objective:We have pursued the association between clinical and socio-demographic characteristics and the suicide attempts at inpatients with major depressive disorder.Method:We ran an historical case control study to analyse the individual characteristics associated with suicide attempts in the depression inpatients admitted into the 9th Department of the Clinical Psychiatric Hospital “Al. Obregia” between 01 January 2007 - 01 January 2008. A total of 168 subjects with major depressive disorder (MDD) were included in the study. The patients were separated into two subgroups: “S” - the group with suicide attempt as reason of the present admission into hospital and the comparative group “C” - those without a suicidal attempt at the present admission (used as control group). The two groups were compared with respect to the individual characteristics, following their possible association with the suicidal attempts risk. We used the chi-square (x2) statistic for categorical variables.Results:Our findings suggest that the most robust predictors of suicide attempts in depression are the younger age of the depression onset, previous psychiatric hospitalizations, low socio-economic status, “single” marital status (widowed/divorced), with no children, heredocolateral history of suicidal attempts and the comorbidity with the problematic alcohol consumption.Conclusion:The risk factors associated with the suicidal attempts are useful for the screening, finding, prediction and prophylaxis of suicide attempts in major depression.

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Experimental Research of the Sense-Value Regulation of Future Teachers in Academic and Professional Activity

Revista Romaneasca pentru Educatie Multidimensionala ◽

10.18662/rrem/13.4/495 ◽

2021 ◽

Vol 13 (4) ◽

pp. 509-523

Author(s):

Ihor Halian ◽

Ihor Popovych ◽

Yurii Nesin ◽

Yurii Zavatskyi ◽

Iryna Vashchenko ◽

...

Keyword(s):

Professional Development ◽

Factor Analysis ◽

Life Experience ◽

Self Regulation ◽

Educational Institutions ◽

Professional Activity ◽

Control Group ◽

Future Teachers ◽

Sensory Regulation ◽

The Individual

The research is psychological-pedagogical experiment with factor analysis of value-sense meaningful parameters, preferences, expectations of future teachers (N = 140). The aim is to study the psychological rich in content features of formation of the value-sense sphere of future teachers. Values, while forming in the life experience of the individual, determinate the purpose-oriented and motivational program of behavior and provide sensory regulation of life activity. Personal sense, as a subject determinant, defines the effectiveness of professional activity. The development of system of values and senses is determined by rich in content process, the involvement of students in various types of social activities and purposeful impact by training facilities. Research methods: psychological and pedagogical experiment, standardized tests, factor analysis. The structure of value and sense regulation is determined. The forming stage provided changes in the experimental group (N = 17) from values oriented on social perception to values of personal and professional development. In the control group (N = 19), the dominance of personal comfort values was recorded. Compared to the ascertaining stage, the values of personal- professional development has emerged. The results obtained can be useful to stakeholders, leaders of educational institutions, researchers of self-regulation, axiogenesis, life creation and personality expectations.

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Effect of Yoga on Adolescents’ Attitude towards Violence

Journal of Human Values ◽

10.1177/0971685816689734 ◽

2017 ◽

Vol 23 (2) ◽

pp. 81-91

Author(s):

Govindaraja Setty A.G. ◽

Pailoor Subramanya ◽

B. Mahadevan

Keyword(s):

Mental Stress ◽

Control Group ◽

Yoga Practice ◽

Significant Progress ◽

Physical Exercises ◽

Yoga Group ◽

The Individual ◽

Formative Years

As society progresses with newer technology choices and greater materialistic welfare, we also witness more incidences of aggression and violence among the youth and adolescents. This is partly due to the mental stress that they undergo. There has been a renewed interest to understand the causes of aggression and violence. More importantly, there is an interest to identify methods to manage these. This article is an attempt to showcase the usefulness of yoga in addressing this aspect. The present study was conducted to find out the effect of 4 weeks’ yoga practice on 158 (76 girls and 82 boys) normal healthy adolescents’ attitude towards violence (ATV) in comparison to practice of physical exercises (PE). The study showed that both yoga and PE groups demonstrated significant reduction in their positive ATV strategies and increased positive use of non-violent strategies. Boys in the yoga group showed significant improvement, whereas the control group showed non-significant improvement. Girls in the yoga also displayed significant progress over the control group. Thus, the study points to the usefulness of introducing yoga to the adolescents in their formative years through a structured curriculum. This is likely to provide numerous benefits both for the individual and the society at large.

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Individual factor structure of qualified volleyball players' preparedness

Health, sport, rehabilitation ◽

10.34142/hsr.2019.05.01.06 ◽

2019 ◽

Vol 5 (1) ◽

pp. 56

Author(s):

Zh.L. Kozina ◽

S.B. Khrapov ◽

S. Yevstratov ◽

N.A. Kolomiets ◽

S.V. Hryshchenko ◽

...

Keyword(s):

Factor Analysis ◽

Factor Structure ◽

Factor Models ◽

Relative Strength ◽

The Body ◽

Individual Factor ◽

Starting Position ◽

Flexion Extension ◽

Volleyball Players ◽

The Individual

The purpose of the study was to develop individual factor models of physical preparedness of high-level volleyball players of different game roles. Matherial and methods. The study was attended by 12 players of the Kharkiv woman women team in Kharkiv Volleyball players were tested for 10 indicators of pedagogical pedagogical testing: Running to 4 points; Running for determining the speed of movement along the volleyball court at a distance of 30 m (9-3-6-3-9 m); Jump in height from place; Jump in height from run; Throwing a stuffed ball from the starting position sitting; Throwing a stuffed ball from the starting position is lying; Lifting of the body from the position lying on the back for 20 s (number of times); Elevation of body from the position of lying on the stomach for 20 s (number of times); The flexion-extension of the hands in the emphasis lying for 20 s (number of times); Leap length from space. The obtained data were mathematically processed using factor analysis methods, on the basis of which the individual factor models of players were constructed. Results. On the basis of factor analysis, the structure of qualified volleyball players' preparedness was determined, in which four expressed factors were expressed: speed-strength training, relative strength, special endurance, high endurance. The model of the belonging of the players to the role is determined according to the determined factor structure: in the attackers of the first pace, the following factors are factors such as speed-power preparedness and relative strength, at attackers of the second pace - speed-power preparedness and fast endurance, fast endurance and special endurance, in Libero - relative strength and special endurance. Conclusion. Using the developed scheme, the individual factor models of players and the developed scale of assessments of the test indicators, one can determine the individual potential opportunities of different players to the game in different roles.

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