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  • Neural
  • Neural regulation of the sympathoadrenal system (SAS) is not yet fully understood. (springer.com)
  • Animal studies have shown conclusively that sympathetic neural factors are involved in the development and/or maintenance of high blood pressure. (ovid.com)
  • Induction of the sympathetic nervous system (SNS) from its neural crest (NC) precursors is dependent on BMP signaling from the dorsal aorta. (biologists.org)
  • endocrine
  • 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)
  • pharmacological
  • In certain chronic pain conditions (e.g. complex regional pain syndrome (CRPS)), the presence of sympathetic signs forms part of the diagnostic criteria.Typical management will involve a multidisciplinary approach, including physical, pharmacological, and psychological therapies. (medworm.com)
  • body's
  • 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)
  • body
  • When the individual senses a dangerous or threatening situation, the sympathetic nervous system sends signals throughout the body telling the heart and respiration rates to increase, the pupils to dilate, and the arteries to constrict in preparation for the fight or flight response. (wisegeek.com)
  • When these two systems work in conjunction, it allows the body to adjust to be adequately prepared to face danger, while at the same time not causing any permanent damage from long periods of increased activity. (wisegeek.com)
  • level
  • 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)
  • Role
  • Role of sympathetic nervous system in non-ischaemic ventricular arrhythmias. (bmj.com)
  • 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)
  • Chapter
  • In this chapter anatomical aspects of this system are described that must be known to the physician who performs surgical procedures on the sympathetic chain. (springer.com)