View clinical trials related to Stress Reaction.
Filter by:Research has shown that activation of the sympathetic nervous system for extended periods or during certain times in life can increase the risk for Alzheimer's disease. Some research in animal models show that acute activation of the sympathetic nervous system through stress exposure can increase certain Alzheimer's disease-related biomarkers, such as amyloid-beta, within hours of exposure. However, how acute sympathetic nervous system activation via stress exposure affects amyloid-beta levels in humans has yet to be examined. In this study, the investigators will examine whether brief increases in sympathetic activation result in immediate changes in plasma amyloid-beta levels in the five hours after exposure.
The purpose of this study is to examine racial differences in smoking behaviors and stress responses between African American and white male smokers.
Objective structured clinical examinations (OSCEs) have recently been incorporated in the French medical studies. They will soon be an important part of the national evaluation of the students, therefore being responsible for a high level of stress. The differents strategies of coping have never been characterized for this particular group of students. We hypothetize that different strategies of coping are associated with different level of stress, thus being an interesting insight to help students to deal with their stress and prevent disorders linked to stress. We will be using the Brief Cope Scale to assess the different ways of coping, in addition to multiple demographic and health-related questionnaires.
Mobile battle ground games are widely used in various age groups, there are ocular and cardiac affection that may affect users of this type of action games.
Transcranial infrared laser stimulation is a non-invasive neuromodulation technique. The study will examine the effect of transcranial infrared laser stimulation on cardiovascular and metabolic responses to stress.
The neurobiological response to stress is an adaptive response allowing us to cope with the multiple aggressions of daily life. This response orchestrates the body's systemic reaction. The intensity of response to stress can modify the body's functioning, which implies a variety of fields where biomarkers may be isolated: immunity, psychology, neurophysiology, integrative physiology. When stress is too intense or prolonged, response to stress may become misfitted and deleterious. This study is based on the hypothesis that a severe physical or psychological trauma is associated with an intense and misfitted stress that is responsible from an undue immuno-inflammatory activation (through sympathetic activation). The result is a subinvasive state of systemic and tissue inflammation (low-noise inflammation), responsible for the mid-term deleterious consequences of the traumatic event. The objective of this study is to understand how the dysregulation of intense stress simultaneously generates an initial pathological state and an alteration of mid-term evolution (which is considered as a poor prognosis and/or as responsible for after-effects). The investigators wish to identify relevant biomarkers of the mechanisms activated during intense stress and influencing the immuno-inflammatory and epigenetic spheres with deleterious consequences on physiological and psychological functions.
Beta blockers (BB) play an important role in protection of end organs that are susceptible for secondary injury by the Traumatic brain injury (TBI)-induced catecholamine surge. However, use of BBs in trauma patients is not yet the standard of care which necessitates clear scientific evidence and justification to be used especially in TBI patients. The BBTBBT study aims to determine whether early administration of propranolol based on the HSTnT status will improve the outcome of mild-to-severe TBI patients. Our primary hypothesis is that BBs are effective in reducing 10 and 30-day mortality in TBI patients.BBs are effective in reducing 10 and 30-day mortality in TBI patients. Methods/Design: The BBTBBT study is a prospective, randomized, double-blinded, placebo-controlled trial, three-arm trial of BB use in mild-to-severe TBI patients based on the HsTnT status.
Stress is important for health. As emergency departments (EDs) are often stressful places, a better understanding of the human stress response is important for understanding how and why patients respond as they do when they come to the ED. Since the investigators cannot take up space in the ED for research, the investigators will instead recruit 20 methamphetamine-using participants who are not currently in treatment and 10 healthy adult matched participants to a simulated ED room in the University of Arkansas for Medical Sciences (UAMS) Simulation Center. The investigators will have participants perform a stressor task involving public speaking and a simple arithmetic task. The investigators will see if this experiment can be made to be like being in an actual ED by varying what participants speak about in the task. By doing this, the investigators hope to find out several important things: 1) Is a stressor task feasible and acceptable to participants? 2) What does the stress response -- as measured by cortisol and alpha-amylase -- look like in these participants? 3) Does varying what participants talk about make the experiment seem more like an actual ED? 4) Do participants under stress show even mild symptoms of agitation as measured by clinical scales? If so, how often?
Stress is a complex natural phenomenon, frequently related to a physiological response, including heart rate, heart rate variability, respiratory rate, skin conductance and temperature. The subjective experience varies greatly; broadly, it may be conceived as a freeze, flight, fight, fright or faint response. Many studies have demonstrated the negative influence of psychological stress on health and well-being. Through the digital phenotyping of physiological and psychological stress reactions, in a controlled laboratory setting (Trier Social Stress Test- TSST) and real-life situations, in a population of healthy participants and patients with a major psychiatric disorder, we expect to find reliable and valid digital biomarkers. The results of this study will, therefore, not only contribute to a better understanding of stress and stress response but also have the potential to improve diagnostic and treatment approaches.
Opioids is known that produce not only analgesia but also hyperalgesia through activation of central glutaminergic system-GABA. At the same time, recently it was found that the main opioid receptor (OPRM1) is present on human granulosa cells and exogenous opiates and their antagonists can influence granulosa cell vascular endothelial growth factor (VEGF) production via OPRM1, causing ovarian hyperstimulation syndrome. This study aims to investigate if a single exposure to opioids is enough to produce activation of stress mechanism during oocyte retrieval.