Neural and cardiovascular responses to emotional stress in humans.
نویسندگان
چکیده
Sympathetic neural responses to mental stress are well documented but controversial, whereas sympathetic neural responses to emotional stress are unknown. The purpose of this study was to investigate neural and cardiovascular responses to emotional stress evoked by negative pictures and reexamine the relationship between muscle sympathetic nerve activity (MSNA) and perceived stress. Mean arterial pressure (MAP), heart rate (HR), MSNA, and perceived stress levels were recorded in 18 men during three randomized trials: 1) neutral pictures, 2) negative pictures, and 3) mental stress. MAP and HR increased during mental stress (Delta14 +/- 2 mmHg and Delta15 +/- 2 beats/min, P < 0.001) but did not change during viewing of negative or neutral pictures. MSNA did not change during viewing of neutral (Delta1 +/- 1 burst/min, n = 16) or negative (Delta0 +/- 1 burst/min, n = 16) pictures or during mental stress (Delta1 +/- 2 burst/min, n = 13). Perceived stress levels were higher during mental stress (3 +/- 0 arbitrary units) than during viewing negative pictures (2 +/- 0 arbitrary units, P < 0.001). Perceived stress levels were not correlated to changes in MSNA during negative pictures (r = 0.10, P = 0.84) or mental stress (r = 0.36, P = 0.23). In conclusion, our results demonstrate robust increases in MAP and HR during mental stress, but not during emotional stress evoked by negative pictures. Although the influence of mental stress on MSNA remains unresolved, our findings challenge the concept that perceived stress levels modulate MSNA during mental stress.
منابع مشابه
توسعه سامانه مکاترونیکی بلادرنگ سنجش استرس، مبتنی بر سیگنالهای حیاتی
Stress has affected human’s lives in many areas, today. Stress can adversely affect human’s health to such a degree as to either cause death or indicate a major contributor to death. Therefore, in recent years, some researchers have focused to developing systems to detect stress and then presenting viable solutions to manage this issue. Generally, stress can be identified through three differe...
متن کاملUsing emotional intelligence to predict job stress: Artificial neural network and regression models
Introduction: These days, there is a consensus that emotional intelligence plays an important role in the success of individuals in different areas of life. Persons with higher emotional intelligence had lower stress in dealing with demands and pressures in the workplace. The purpose of this study was to use artificial neural network to predict job stress and to compare the performance of this ...
متن کاملCardiovascular responses produced by resistin injected into paraventricular nucleus mediated by the glutamatergic and CRFergic transmissions within rostral ventrolateral medulla
Objective(s): Resistin, as a 12.5 kDa cysteine-rich polypeptide, is expressed in hypothalamus and regulates sympathetic nerve activity. It is associated with obesity, metabolic syndrome and cardiovascular diseases. In this study, we investigated the neural pathway of cardiovascular responses induced by injection of resistin into paraventricular nucleus (PVN) with rostr...
متن کاملP142: The Prefrontal Cortex and Stress-Related Psychopathologies
The prefrontal cortex (PFC) plays a central role in processing both normal and pathological affective states and it is among the brain regions most closely associated with stress-related psychopathology in humans. The ventromedial PFC (vmPFC) in particular has been shown to be required for healthy emotional regulation, social function and risk assessment and decision-making. Also this region ex...
متن کاملThe effect of education based on Orem’s self-care model on emotional reactions in patients with Implantable Cardioverter Defibrillator (ICD)
Abstract Aim. The purpose of this study was to examine the effect of education based on Orem’s self-care model on emotional reactions in people with Implantable Cardioverter Defibrillator (ICD). Background. ICD shock is unpredictable and associated with physical pain. After receiving shock, some patients find serious psychological problems such as anxiety, depression and stress. According to Or...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- American journal of physiology. Regulatory, integrative and comparative physiology
دوره 295 6 شماره
صفحات -
تاریخ انتشار 2008