The thesis deals with the issue of stress in teachers. The concepts of teacher, stressor, stress and burn out syndrome are explained, as well as the connection between them. The theoretical part is focused on the stress prevention and the defense against stress. The aim of the practical part is to detect the main stressors in teachers, as well as the frequency and the intensity of their stress and negative emotions experience with regard to their professional age, sex and specialization. Further, teachers' knowledge about stress and their effort to prevent themselves from experiencing it are investigated.

We assessed influence of three acclimation regimes and influence of recovery after cold shock (exposure to 0°C for a period of time corresponding to Lt25) on the relative mRNA levels of selected stress proteins using qRT-PCR method. Larvae acclimated at 25°C showed relatively weak upregulation responses to cold shock. Much stronger responses were observed in the larvae that were cold-acclimated at 15°C or 15°C ? 6°C prior to cold shock. Two different general trends were distinguished in the response to cold acclimation and cold shock: (a) proteins from families SP70 and SP90 and splice variants c and d of the transcription factor HSF were upregulated in response to cold acclimation and the levels of their mRNA transcripts further increased after cold shock (for instance, the abundance of hsp70Aa mRNA increased up to 300-fold after cold shock (acclimation variant 15°C ? 6°C)); (b) four members of the small Hsp family (22, 23, 26 and 27 kDa) and splice variants a and b of the transcription factor HSF were down-regulated during cold acclimation (for instance, 10-fold in the case of hsp22) and the levels of their mRNA transcripts were either unchanged or increased only moderately after the cold shock. A third group of proteins, namely Hsc70, Hsp40 showed no or relatively small changes.

Die Arbeit untersucht die physiologische und psychologische Stressreaktion von Kindern und Jugendlichen mit internalisierenden Störungen im Vergleich zu gesunden Kontrollkindern (n = 55 pro Gruppe, Alter 8-14 J). Es wurde ein standardisierter Stressor, der Trier Social Stress Test for Children (TSST-C; Buske-Kirschbaum et al., 1997) eingesetzt und die Stressreaktion der Probanden mehrdimensional erfasst. So wurde vor und nach Stresstest insgesamt zu 9 Messzeitpunkten die physiologische Stressreaktion anhand des Stresshormons Cortisol gemessen sowie die aktuelle subjektive Aufregung erfragt. Die kognitive Stressreaktion wurde unmittelbar nach dem Stresstest anhand einer subjektiven Leistungseinschätzung sowie eine Stunde nach dem Stressor anhand eines Fragebogens zu negativen Kognitionen erfasst. Es zeigte sich, dass die Kinder der internalisierenden Gruppe eine signifikant geringere physiologische (blunted reaction) sowie eine signifikant höhere kognitive Stressreaktion aufweisen als die Kinder der Kontrollgruppe. Darüber hinaus zeigte sich eine Unterschied in den subjektiven Aufregungswerten nach dem Stresstest, mit einer höheren und länger andauernden Aufregung in der internalisierenden Gruppe. Im Rahmen von mehreren explorativen Fragestellungen wurde der Zusammenhang zwischen den verschiedenen Aspekten der Stressreaktion untersucht. Stärken und Schwächen der Arbeit sowie klinische Implikationen der gefundenen Ergebnisse werden diskutiert.:Inhaltsverzeichnis 1. Bibliografische Zusammenfassung ......5 2. Abkürzungsverzeichnis ..........................................................6 3. Abbildungsverzeichnis ................................................8 4. Tabellenverzeichnis.....................................................10 5. Einleitung ....................................................................11 6. Theoretischer Hintergrund ............................13 6.1. Internalisierende Störungen im Kindes- und Jugendalter.................13 6.2. Stress.............................................................................14 6.2.1. Definition .................................................14 6.2.2. Stressoren ...........................................15 6.2.3. Laborstressor – Trier Social Stress Test for Children...................16 6.3. Stressreaktion.............................................18 6.3.1. Physiologische Stressreaktion....................................18 6.3.2. Psychologische Stressreaktion ...........................22 6.3.2.1. Subjektive Stressreaktion...............................22 6.3.2.2. Kognitive Stressreaktion................................24 7. Fragestellungen und Hypothesen ...............................28 8. Methoden............................................................35 8.1. Stichprobe und Rekrutierungswege ........................35 8.2. Messverfahren und Instrumente ......................39 8.2.1. Webapplikation zur Präsentation der Fragebögen: LimeSurvey..........39 8.2.2. Phänotypisierung der Probanden .....................40 8.2.2.1. Intelligenztest ..............................41 8.2.2.2. Screeningfragebogen für psychopathologische Auffälligkeiten ........41 8.2.2.3. Diagnostisches Interview .......................42 8.2.3. Psychosozialer Stresstest.....................43 8.2.4. Instrumente und Methoden zur Erfassung der Stressreaktion...................46 8.2.4.1. Physiologische Stressreaktion.......................................................46 8.2.4.2. Subjektive Stressreaktion...................................................49 8.2.4.3. Kognitive Stressreaktion...................................50 8.3. Stichprobenbeschreibung:.................................................51 9. Datenanalyse .........................................................55 10. Ergebnisse ................................................................57 10.1. Physiologische Stressreaktion ..........................................57 10.2. Subjektive Stressreaktion.....................................................................61 10.2.1. Aufregung im zeitlichen Verlauf .........................................................64 10.2.2. Aufregung vor dem Stresstest ............................................................64 10.2.3. Aufregung während des Stresstests.......................................................65 10.2.4. Aufregung nach dem Stresstest...................................................66 10.3. Kognitive Stressreaktion.....................................................................67 10.3.1. Subjektive Leistungseinschätzung ............................................67 10.3.2. Negative Kognitionen ...........................................................................67 10.3.2.1. Wie oft an die Situation gedacht?.........................................................67 10.3.2.2. Valenz der Gedanken..........................................................................68 10.3.2.3.Summe negativer Kognitionen .............................................................69 10.4. Zusammenhang zwischen den verschiedenen Stressaspekten.............................71 10.4.1. Zusammenhang zwischen der physiologischen und der subjektiven Stressreaktion ...71 10.4.2. Zusammenhang zwischen den verschiedenen psychologischen Stressaspekten ......72 10.5. Vorhersage der Gruppenzugehörigkeit anhand der verschiedenen Aspekte der Stressreaktion.........75 11. Diskussion ........................................77 12. Zusammenfassung der Arbeit..............................................92 13. Literatur .................................................................96 14. Anlagen .....................................................103 14.1. Anlage 1: Exkurs: Analyse der beiden Teilaufgaben des Stresstests .................................103 14.2. Anlage 2: post-hoc paarweise Vergleiche der Aufregungswerte........................................110 14.3. Anlage 3: Instrumentenübersicht LIFE Child Depression..................................................111 14.4. Anlage 4: SOP Subgruppenuntersuchung Kind..................................................................112 14.5. Anlage 5: SOP TSST-Wissenschaftler ............................................................................143 14.6. Anlage 6: Dokumentationsbogen für TSST-C-Wissenschaftler.........................................155 14.7. Anlage 7: Thoughts Questionnaire for Children.................................................................156 15. Erklärung über die eigenständige Abfassung der Arbeit...............................................158 16. Lebenslauf ...................................................................159 17. Publikationen...............................................................................161 18. Danksagung ..............................................................................163

The present study examined whether cardiovascular habituation to stress is affected by a change in the physical context in which a stressor is encountered. Twenty-five undergraduate students at the University of Central Florida, Palm Bay Campus, were exposed to 4 trials of a stressor consisting of mental arithmetic while under evaluative observation. It was hypothesized that if participants experienced a change in the physical context in which stress was experienced on the final trial, they would demonstrate impaired habituation to stress as indicated by measures of heart rate and blood pressure. Physical context was manipulated by either asking participants to move to another room upon the final exposure to the stressor or to remain in the same room in which they were initially exposed to the stressor for the final exposure. Participants were randomly assigned to one of 2 conditions, the Stable Room Condition (N = 10) or Novel Room condition (N = 15 ). Participants in the Stable Room Condition remained in the same physical context, or same room, throughout all trials and displayed habituation of systolic .blood pressure, diastolic blood pressure, and heart rate. Participants in the Novel Room condition were exposed to the same stressors, but were moved to a different physical context, or new room upon the final trial. The results demonstrated that participants in the novel room condition displayed significantly impaired habituation on measures on systolic blood pressure (p < .001) and diastolic blood pressure (p < .001). However, no significant difference in heart rate was observed between groups. These results indicate that a simple change in the physical context in which stress exposure occurs impairs cardiovascular habituation to stress. Implications and directions for future research are discussed.

This thesis deals with the stress, strain and stress level of stress. It examines what more burdens on JIPu sisters and what the standard department, what are the specifics of their work. Compares the work load and nursing department and the standard JIPu. It looks at how the situation affects of stress nurses. It outlines the causes and manifestations of stress effects on the human organism. He is also the burnout that often occurs among workers in the helping professions. The thesis is focused on the shift operation (especially on night shift), relationships at work (sister-sister, sister-doctor), the aggressive behavior of patients, or the lack of sufficient time for patient care. Research method is a questionnaire distributed to the nurses and the internal standard surgical wards and ICU. The evaluation questions of the questionnaire confirms or overthrows the hypothesis that I set at the beginning of research. The hypotheses were confirmed hypotheses 2 and 5 of the hypothesis was not confirmed. It was confirmed that the exchange operation and overload nurses, patient aggression, care of confused patients and bad interpersonal relations a high burden on medical personnel and contributes significantly to the stress load of nurses. In conclusion, I mention that a large role in preventing and...

A perimenopausa é caracterizada como o período de transição da vida reprodutiva para a não reprodutiva em mulheres, e inicia-se com o aparecimento dos sintomas clínicos, prolongandose até um ano após a última menstruação. Esta fase é caracterizada pela ocorrência de ciclos menstruais irregulares, alterações na produção hormonal, bem como por mudanças comportamentais, neuroendócrinas e metabólicas, sendo o período de maior vulnerabilidade a desordens afetivas quando comparado às outras fases da vida. Apesar dos diversos estudos desenvolvidos acerca das manifestações destes sintomas durante a perimenopausa, ainda pouco se sabe a respeito das modificações na atividade do eixo hipotálamo-hipófise-adrenal (HPA) e da resposta ao estresse. O reagente químico diepóxido de 4-vinilciclohexeno (VCD) acelera o processo natural de atresia folicular, possibilitando estudos desta fase da vida reprodutiva. Assim sendo, sua aplicação em roedores constitui um excelente modelo experimental capaz de simular em animais o que ocorre durante a perimenopausa. Assim, os objetivos deste trabalho foram avaliar, neste modelo animal de perimenopausa: 1) as respostas endócrinas (corticosterona e progesterona) e neuroniais (atividade das subdivisões parvocelulares medial e posterior - PaMP e PaPo do núcleo paraventricular do hipotálamo (PVN) e do locus coeruleus - LC) ao estresse de contenção e 2) a influência da terapia hormonal sobre estas respostas. Para tanto, ratas Wistar receberam injeções subcutâneas de Óleo ou VCD por 15 dias consecutivos, a partir do 28° dia de vida. Ao redor do 56º ao 66º dia do início da administração de Óleo ou VCD, as ratas dos grupos a serem estressados receberam implantes subcutâneos de um pellet contendo placebo (PL), estradiol (E2), progesterona (P4) ou estradiol+progesterona (E2P4). O estresse de contenção foi aplicado por 30 minutos entre 09:00h e 10:00h na fase do diestro, ou 20 dias após o início da terapia hormonal (grupos VCD+E2, VCD+P4 e VCD+E2P4), de 75 a 85 dias após o início da administração de VCD/Óleo. O sangue foi coletado imediatamente (0min) e 60min após o final do estresse, quando os animais foram anestesiados e perfundidos para obtenção do tecido cerebral e posterior estudo imunohistoquímico das áreas de interesse. As concentrações basais de corticosterona foram semelhantes entre os grupos Óleo e VCD não estressadas. Contudo, asecreção de corticosterona em resposta ao estresse das ratas em periestropausa foi 72% menor que a do grupo controle. As concentrações basais de progesterona das ratas em periestropausa foram menores do que aquelas das ratas controles, mas o aumento da secreção deste hormônio induzido pelo estresse agudo por contenção não foi diferente entre os grupos. Centralmente, nas subdivisões PaMP e PaPo do PVN, assim como no LC, o número de neurônios c-Fos positivos expressos não foi diferente entre ratas VCD e óleo e o estresse aumentou de maneira semelhante o número de neurônios ativados em ambos os grupos. A secreção de corticosterona de animais em periestropausa tratados com estradiol, associado ou não à progesterona, foi ainda mais atenuada. Por outro lado, nas ratas tratadas com progesterona, as concentrações de corticosterona após o estresse mostraram-se mais elevadas que as do grupo VCD estressado sem tratamento hormonal. Todos os grupos tratados com hormônios aumentaram a secreção de progesterona em resposta ao estresse, no entanto esta resposta foi amplificada pelo estradiol. Nenhum dos tratamentos hormonais modificou a atividade neuronial após o estresse na PaMP, embora todos tenham atenuado esta resposta na PaPo. No LC, todos os tratamentos bloquearam o aumento de atividade neuronial induzida pelo estresse. Uma hora após o final do estresse, as concentrações de corticosterona e progesterona retornaram aos níveis basais observados nas ratas não estressadas. No entanto, nos grupos tratados com estradiol, os níveis de progesterona não retornaram aos basais, sendo estes níveis significantemente maiores após o fim do estímulo. Em conjunto, nossos resultados demonstram que na periestropausa, embora a secreção de progesterona em resposta ao estresse esteja preservada, a capacidade da adrenal em secretar corticosterona está reduzida. Esta redução parece não estar associada à deficiência central no funcionamento do eixo HPA (PVN) ou do sistema simpático central (LC), mas sim, a disfunções na esteroidogênese adrenal, que foram parcialmente corrigidas pela progesterona exógena. A diminuição da atividade neuronial do LC pelos esteróides ovarianos sugere uma possível atenuação do tônus simpático por estes hormônios. Ainda, a capacidade de recuperação pós-estresse da secreção de corticosterona e de progesterona se mostrou preservada neste modelo experimental. / Perimenopause is characterized as the period of transition from reproductive to nonreproductive life in women, and begins with the onset of clinical symptoms, lasting up to one year after the last menstrual period. This phase is characterized by irregular menstrual cycles, alterations in hormonal production, as well as by behavioral, neuroendocrine and metabolic changes, and increased vulnerability to affective disorders when compared to other phases of life. Despite the various studies on the manifestations of these symptoms during perimenopause, little is known about the changes in hypothalamic-pituitary-adrenal (HPA) axis activity and the response to stress. The chemical reagent diepoxide 4-vinylcyclohexene (VCD) accelerates the natural process of follicular atresia, enabling studies of this phase of reproductive life. Therefore, its application in rodents constitutes an excellent experimental model capable of simulating in animals what occurs during perimenopause. Thus, the objective of this study was to evaluate, in an animal model of perimenopause: 1) the endocrine responses (corticosterone and progesterone) as well as the neuronal response (parvocellular subdivisions of PVN, medial- PaMP) and posterior-PaPO and locus coeruleus - LC) to restraint stress and 2) the influence of hormonal therapy on these responses. Female Wistar rats received subcutaneous injections of Oil or VCD for 15 consecutive days, from the 28th day of life. Around the 56th to 66th day of the onset of Oil or VCD administration, the rats of the groups to be stressed received subcutaneous implants of a pellet containing placebo (PL), estradiol (E2), progesterone (P4) or estradiol + progesterone (E2P4 ). Restraint stress was applied for 30 minutes between 09:00 and 10:00 in the diestrus phase, or 20 days after the onset of hormonal therapy (VCD + E2, VCD + P4 and VCD + E2P4 groups), from 75 to 85 days after starting VCD / Oil administration. The blood was collected immediately (0min) and 60min after the end of stress, when the animals were anesthetized and perfused to take the brain for immunohistochemistry of PVN and LC. Basal corticosterone concentrations were similar between the non-stressed Oil and VCD groups. However, corticosterone secretion in response to stress was 72% lower than that of the control group. The basal progesterone concentrations of periestropausal rats were lower than those of the control rats, but the increase in the secretion of this hormone induced by stress was not different between thegroups. Centrally, in the PaMP and PaPO subdivisions of PVN as well as LC, the number of c-Fos positive neurons expressed was not different between VCD and Oil rats and the stress increased similarly the number of activated neurons in both groups. Corticosterone secretion from estradiol-treated periestropause rats, associated or not with progesterone, was further attenuated. On the other hand, in rats treated with progesterone, post-stress corticosterone concentrations were higher than those in the stressed VCD group without hormonal treatment. All groups treated with hormones increased progesterone secretion in response to stress, however this response was amplified by estradiol. None of the hormone treatments modified neuronal activity after stress in PaMP, although all hormone treatment attenuated this response in PaPo. In the LC, all treatments blocked the increase of neuronal activity induced by stress. One hour after the end of stress, corticosterone and progesterone concentrations returned to the baseline levels observed in the non-stressed rats. However, in the estradioltreated groups, progesterone levels did not return to the basal levels, these levels being significantly higher after the end of the stimulus. Taken together, our results demonstrate that in periestropause, although progesterone secretion in response to stress is preserved, the ability of the adrenal to secrete corticosterone is reduced. This reduction appears not to be associated with a central deficiency in HPA axis (PVN) or central sympathetic (LC) function, but rather to dysfunctions in adrenal steroidogenesis, which have been partially corrected by exogenous progesterone. The reduction of neuronal LC activity by ovarian steroids suggests a possible attenuation of sympathetic tone by these hormones. Furthermore, the post-stress recovery capacity of corticosterone and progesterone secretion seems to be preserved in this experimental model.

The thesis deals with a nurse and the care of her own health. The theoretical part mainly deals with mental health, proper regimen and physical as well as mental load on nurses in relation to the health care job. The main aim of the thesis was to identify the factors affecting the regimen of nurses and their care about their own health, and to try to find how the work load and department character is related to possible occurrence of health problems. Partial goals and working hypotheses were set for this purpose. Variables like age, gender, education and type of department were included among the assumed factors affecting care about health and health problems.

The thesis deals with the stress of social workers in selected institutions in Strakonice. The thesis has six chapters in total, of which the first five are theoretical and the last chapter that concerns practical investigation. Theoretical chapters are based on literature and provide basic general information about stress such as the theory of stress, definition of stress, stressor. They also contain a chapter on social and personal predispositions and stress management, which describes the role of faith, residence concepts, help syndrome, stress at work, supervision. The last of the theoretical chapters discusses the consequences of stress mental hygiene and ways to measure stress. The empiric research follows up on the theoretical chapters. First of all, all methods used in the research are described and it is explained why these have been used. Methods are followed by the sample of examined group, individual profiles of respondents and data analysis. Follows the controversy over the acquired knowledge, which is part of the discussion and followed by the conclusion of the whole work.

A perimenopausa é caracterizada como o período de transição da vida reprodutiva para a não reprodutiva em mulheres, e inicia-se com o aparecimento dos sintomas clínicos, prolongandose até um ano após a última menstruação. Esta fase é caracterizada pela ocorrência de ciclos menstruais irregulares, alterações na produção hormonal, bem como por mudanças comportamentais, neuroendócrinas e metabólicas, sendo o período de maior vulnerabilidade a desordens afetivas quando comparado às outras fases da vida. Apesar dos diversos estudos desenvolvidos acerca das manifestações destes sintomas durante a perimenopausa, ainda pouco se sabe a respeito das modificações na atividade do eixo hipotálamo-hipófise-adrenal (HPA) e da resposta ao estresse. O reagente químico diepóxido de 4-vinilciclohexeno (VCD) acelera o processo natural de atresia folicular, possibilitando estudos desta fase da vida reprodutiva. Assim sendo, sua aplicação em roedores constitui um excelente modelo experimental capaz de simular em animais o que ocorre durante a perimenopausa. Assim, os objetivos deste trabalho foram avaliar, neste modelo animal de perimenopausa: 1) as respostas endócrinas (corticosterona e progesterona) e neuroniais (atividade das subdivisões parvocelulares medial e posterior - PaMP e PaPo do núcleo paraventricular do hipotálamo (PVN) e do locus coeruleus - LC) ao estresse de contenção e 2) a influência da terapia hormonal sobre estas respostas. Para tanto, ratas Wistar receberam injeções subcutâneas de Óleo ou VCD por 15 dias consecutivos, a partir do 28° dia de vida. Ao redor do 56º ao 66º dia do início da administração de Óleo ou VCD, as ratas dos grupos a serem estressados receberam implantes subcutâneos de um pellet contendo placebo (PL), estradiol (E2), progesterona (P4) ou estradiol+progesterona (E2P4). O estresse de contenção foi aplicado por 30 minutos entre 09:00h e 10:00h na fase do diestro, ou 20 dias após o início da terapia hormonal (grupos VCD+E2, VCD+P4 e VCD+E2P4), de 75 a 85 dias após o início da administração de VCD/Óleo. O sangue foi coletado imediatamente (0min) e 60min após o final do estresse, quando os animais foram anestesiados e perfundidos para obtenção do tecido cerebral e posterior estudo imunohistoquímico das áreas de interesse. As concentrações basais de corticosterona foram semelhantes entre os grupos Óleo e VCD não estressadas. Contudo, asecreção de corticosterona em resposta ao estresse das ratas em periestropausa foi 72% menor que a do grupo controle. As concentrações basais de progesterona das ratas em periestropausa foram menores do que aquelas das ratas controles, mas o aumento da secreção deste hormônio induzido pelo estresse agudo por contenção não foi diferente entre os grupos. Centralmente, nas subdivisões PaMP e PaPo do PVN, assim como no LC, o número de neurônios c-Fos positivos expressos não foi diferente entre ratas VCD e óleo e o estresse aumentou de maneira semelhante o número de neurônios ativados em ambos os grupos. A secreção de corticosterona de animais em periestropausa tratados com estradiol, associado ou não à progesterona, foi ainda mais atenuada. Por outro lado, nas ratas tratadas com progesterona, as concentrações de corticosterona após o estresse mostraram-se mais elevadas que as do grupo VCD estressado sem tratamento hormonal. Todos os grupos tratados com hormônios aumentaram a secreção de progesterona em resposta ao estresse, no entanto esta resposta foi amplificada pelo estradiol. Nenhum dos tratamentos hormonais modificou a atividade neuronial após o estresse na PaMP, embora todos tenham atenuado esta resposta na PaPo. No LC, todos os tratamentos bloquearam o aumento de atividade neuronial induzida pelo estresse. Uma hora após o final do estresse, as concentrações de corticosterona e progesterona retornaram aos níveis basais observados nas ratas não estressadas. No entanto, nos grupos tratados com estradiol, os níveis de progesterona não retornaram aos basais, sendo estes níveis significantemente maiores após o fim do estímulo. Em conjunto, nossos resultados demonstram que na periestropausa, embora a secreção de progesterona em resposta ao estresse esteja preservada, a capacidade da adrenal em secretar corticosterona está reduzida. Esta redução parece não estar associada à deficiência central no funcionamento do eixo HPA (PVN) ou do sistema simpático central (LC), mas sim, a disfunções na esteroidogênese adrenal, que foram parcialmente corrigidas pela progesterona exógena. A diminuição da atividade neuronial do LC pelos esteróides ovarianos sugere uma possível atenuação do tônus simpático por estes hormônios. Ainda, a capacidade de recuperação pós-estresse da secreção de corticosterona e de progesterona se mostrou preservada neste modelo experimental. / Perimenopause is characterized as the period of transition from reproductive to nonreproductive life in women, and begins with the onset of clinical symptoms, lasting up to one year after the last menstrual period. This phase is characterized by irregular menstrual cycles, alterations in hormonal production, as well as by behavioral, neuroendocrine and metabolic changes, and increased vulnerability to affective disorders when compared to other phases of life. Despite the various studies on the manifestations of these symptoms during perimenopause, little is known about the changes in hypothalamic-pituitary-adrenal (HPA) axis activity and the response to stress. The chemical reagent diepoxide 4-vinylcyclohexene (VCD) accelerates the natural process of follicular atresia, enabling studies of this phase of reproductive life. Therefore, its application in rodents constitutes an excellent experimental model capable of simulating in animals what occurs during perimenopause. Thus, the objective of this study was to evaluate, in an animal model of perimenopause: 1) the endocrine responses (corticosterone and progesterone) as well as the neuronal response (parvocellular subdivisions of PVN, medial- PaMP) and posterior-PaPO and locus coeruleus - LC) to restraint stress and 2) the influence of hormonal therapy on these responses. Female Wistar rats received subcutaneous injections of Oil or VCD for 15 consecutive days, from the 28th day of life. Around the 56th to 66th day of the onset of Oil or VCD administration, the rats of the groups to be stressed received subcutaneous implants of a pellet containing placebo (PL), estradiol (E2), progesterone (P4) or estradiol + progesterone (E2P4 ). Restraint stress was applied for 30 minutes between 09:00 and 10:00 in the diestrus phase, or 20 days after the onset of hormonal therapy (VCD + E2, VCD + P4 and VCD + E2P4 groups), from 75 to 85 days after starting VCD / Oil administration. The blood was collected immediately (0min) and 60min after the end of stress, when the animals were anesthetized and perfused to take the brain for immunohistochemistry of PVN and LC. Basal corticosterone concentrations were similar between the non-stressed Oil and VCD groups. However, corticosterone secretion in response to stress was 72% lower than that of the control group. The basal progesterone concentrations of periestropausal rats were lower than those of the control rats, but the increase in the secretion of this hormone induced by stress was not different between thegroups. Centrally, in the PaMP and PaPO subdivisions of PVN as well as LC, the number of c-Fos positive neurons expressed was not different between VCD and Oil rats and the stress increased similarly the number of activated neurons in both groups. Corticosterone secretion from estradiol-treated periestropause rats, associated or not with progesterone, was further attenuated. On the other hand, in rats treated with progesterone, post-stress corticosterone concentrations were higher than those in the stressed VCD group without hormonal treatment. All groups treated with hormones increased progesterone secretion in response to stress, however this response was amplified by estradiol. None of the hormone treatments modified neuronal activity after stress in PaMP, although all hormone treatment attenuated this response in PaPo. In the LC, all treatments blocked the increase of neuronal activity induced by stress. One hour after the end of stress, corticosterone and progesterone concentrations returned to the baseline levels observed in the non-stressed rats. However, in the estradioltreated groups, progesterone levels did not return to the basal levels, these levels being significantly higher after the end of the stimulus. Taken together, our results demonstrate that in periestropause, although progesterone secretion in response to stress is preserved, the ability of the adrenal to secrete corticosterone is reduced. This reduction appears not to be associated with a central deficiency in HPA axis (PVN) or central sympathetic (LC) function, but rather to dysfunctions in adrenal steroidogenesis, which have been partially corrected by exogenous progesterone. The reduction of neuronal LC activity by ovarian steroids suggests a possible attenuation of sympathetic tone by these hormones. Furthermore, the post-stress recovery capacity of corticosterone and progesterone secretion seems to be preserved in this experimental model.

The thesis with title „Stress Evaluation, Coping and Reduction“ is dealing with this nowadays and often discussed problems focused on possibly purposes of work stress, influence of stress on health and techniques of stress coping. The theoretical part concerns on stress and relate topics. In the practical part I have made an analysis of stress load on some employees of dm drogerie markt limited liability company. In conclusion I have suggested proposals leading to stress reduction on this workplace.