• stimulation
  • In the absence of results from leptin infusions, to test for sympathetic stimulation of leptin release, we sought a quantitative naturalistic linkage of sympathetic activity with leptin plasma concentration across a broad range of leptin values in men of widely differing adiposity. (ahajournals.org)
  • More generally, mydriasis also refers to the natural dilation of pupils, for instance in low light conditions or under sympathetic stimulation. (wikipedia.org)
  • Sympathetic stimulation of the adrenergic receptors causes the contraction of the radial muscle and subsequent dilation of the pupil. (wikipedia.org)
  • ANP is secreted in response to: Stretching of the atrial wall, via Atrial volume receptors Increased Sympathetic stimulation of β-adrenoceptors Increased sodium concentration (hypernatremia), though sodium concentration is not the direct stimulus for increased ANP secretion Endothelin, a potent vasoconstrictor Three types of atrial natriuretic peptide receptors have been identified on which natriuretic peptides act. (wikipedia.org)
  • cord
  • It originates in the spinal cord and the medulla and controls homeostasis, or the maintenance of the body's systems. (diffen.com)
  • aldosterone
  • These drugs inhibit the first and rate-limiting step of the renin-angiotensin-aldosterone system (RAAS), namely the conversion of angiotensinogen to angiotensin I. This leads to a totality in absence of Angiotensin II based on the rationale that renin only acts to inhibit this step unlike Angiotensin Converting Enzyme which is also involved in other biochemical reactions. (wikipedia.org)
  • kidneys
  • In 1896, the Finnish physiologist Robert Tigerstedt and the Swedish physician Per Bergman did an experiment on kidneys and the circulatory system in rabbits. (wikipedia.org)
  • Stress
  • Conclusion] Our investigation proves that the mean ST is a reliable measure for identifying stress level changes and may be useful for designing a multimodal stress measurement system. (go.jp)
  • So in essence it is fair to say that the sympathetic nervous system can been heavily affected by high levels of stress. (winddown.co.uk)
  • The sympathetic nervous system will begin to work overtime if it isn't properly maintained with diet, exercise and less stress so it is a necessity that - where possible - you take the time to sit down and eat properly, relaxing while you do so. (winddown.co.uk)
  • Stress Reactivity and Its Association With Increased Cardiovascular Risk: A Role for the Sympathetic Nervous System? (ahajournals.org)
  • 3 Using single-unit recording techniques, we have demonstrated recently that chronic mental stress in subjects with the metabolic syndrome was associated with a higher incidence of multiple firing within a sympathetic burst. (ahajournals.org)
  • body
  • In this lesson, we'll discuss the purpose of the sympathetic nervous system, what physiological changes your body experiences under sympathetic control, and why those changes are necessary in situations such as the one we just mentioned. (study.com)
  • Both nervous systems work in tandem with each other offering what can seem like a push and pull feel to the body. (winddown.co.uk)
  • The sympathetic nervous system does the pushing whilst the parasympathetic system does the pulling, tensing and calming the body respectively. (winddown.co.uk)
  • The upper part of the body, above the sympathetic chain transection, the body becomes anhidriotic, where the patient is unable to sweat or cool down, which further compromises the body's thermoregulation and can lead to elevated core temperature, overheating and hyperthermia. (wikipedia.org)
  • Below the level of the sympathetic chain interruption, body temperature is significantly lower, creating a stark contrast that can be observed on thermal images. (wikipedia.org)
  • blood pressure
  • Individuals who suffer from sudden dizzy spells or changes in heart rate and blood pressure may be developing a malfunction in one of these parts of the nervous system . (wisegeek.com)
  • Deterioration of the sympathetic nervous system is a common occurrence as an individual ages, and usually manifests itself as difficulty dealing with stressful situations and a repression of the body's ability to raise blood pressure and heart rate in response to external stimuli. (wisegeek.com)
  • Lambert E, Dawood T, Straznicky N, Sari C, Schlaich M, Esler M, Lambert G. Association between the sympathetic firing pattern and anxiety level in patients with the metabolic syndrome and elevated blood pressure. (ahajournals.org)
  • causes
  • Most of the symptoms could be a part of the cluster headache syndrome while other possibilities such as sympathetic overdrive, hormonal/ endocrine/ metabolic issues, neuro-muscular causes, micronutrient deficiencies etc. may need to be considered as well. (medhelp.org)
  • tone
  • Using clinical variables, comparison of the frequency of extrasystoles by day and night, and assessment of the antiarrhythmic effect of beta-blockers, the role of the sympathetic tone in non-ischaemic ventricular arrhythmias may be elucidated. (bmj.com)