نتایج جستجو برای: sympathetic nervous system
تعداد نتایج: 2256327 فیلتر نتایج به سال:
BACKGROUND Exposure to particulate matter≤2.5 μm in diameter (PM2.5) increases blood pressure (BP) in humans and animal models. Abnormal activation of the sympathetic nervous system may have a role in the acute BP response to PM2.5 exposure. The mechanisms responsible for sympathetic nervous system activation and its role in chronic sustenance of hypertension in response to PM2.5 exposure are c...
OBJECTIVE To investigate the effects of moderate-intensity exercise on the sympathetic nervous system in male smokers. METHODS Twenty-eight men (14 smokers and 14 non-smokers, ages 21-46 y) were recruited. The activity of the autonomic nervous system was measured by power spectral analysis of heart rate variability. Spectral power in the frequency domain was quantified by integrating the area...
Introduction: Major depressive disorder (MDD) is one of the most prevalent diseases of psychiatry. There is evidence that suggests the autonomic nervous system plays a role in depression. Sympathetic Skin Response (SSR) is used to evaluate the autonomic system. Nerve Conduction Study (NCS) evaluates peripheral thick myelinated fibers. In SSR we evaluate thin unmyelinated fibers. The purpose of ...
The basis of acupuncture is still being studied from many different aspects. Some preliminary views include: 1) The analgesic function of acupuncture derives from the clashing of the biochemical lines of acupuncture and those of the pain stimulus in the transmitting processes of the central nervous system, the former overriding the latter. 2) Acupuncture strengthens the cerebral cortex's inhibi...
Several articles have dealt with the importance and mechanisms of the sympathetic nervous system alterations in experimental animal models of hypertension. This review addresses the role of the sympathetic nervous system in the pathophysiology and therapy of human hypertension. We first discuss the strengths and limitations of various techniques for assessing the sympathetic nervous system in h...
We developed a smart-phone based system to measure the activities of autonomic nervous system during everyday life. Using commonly marketed smart phones, by touching your fingertips on the phone’s camera over a short time of about 30 seconds, it will detect changes in the brightness of the blood flow and in turn analyze your heart rate variability. By using this system, about 100,000 cases were...
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