Loading...
  • mechanisms
  • Thus, elderly blacks have a blunted sympathetic neural responsiveness but enhanced pressor response to orthostasis compared with elderly whites, which may be attributable to an augmented sympathetic vascular transduction and/or nonadrenergic vasoconstrictor mechanisms (ie, angiotensin II or the venoarteriolar response). (ahajournals.org)
  • On the other hand, neural mechanisms may play an important role in regulating blood flow to non-contracting muscle. (frontiersin.org)
  • vasodilation
  • An alternative approach to studying the balance between vasodilation and augmented sympathetic tone that has been used in young adults involves the application of an acute sympathetic stimulus during brachial artery flow-mediated dilation (FMD) ( 14 , 19 , 25 , 48 , 49 ). (physiology.org)
  • Physiological
  • The application of classical tools for ANS analysis, such as HRV during physiological sleep, showed that the rapid eye movement (REM) stage is characterized by a likely sympathetic predominance associated with a vagal withdrawal, while the opposite trend is observed during non-REM sleep. (frontiersin.org)
  • reduction
  • Conclusions -In obese normotensive subjects, a reduction in body weight induced by a hypocaloric diet with normal sodium content exerts a marked reduction in sympathetic activity owing to central sympathoinhibition. (ahajournals.org)
  • Evidence also exists that dietary-induced reductions in body weight are accompanied by a reduction in plasma norepinephrine 1 2 8 and muscle sympathetic nerve traffic. (ahajournals.org)
  • 9 However, these results have been obtained in essential hypertensive individuals and/or by diets that included a restriction of sodium intake, ie, under conditions in which sympathetic activity may be affected by factors other than the body weight reduction per se. (ahajournals.org)
  • The primary aim of the study was to establish the effect of body weight reduction on sympathetic activity without the confounding factors existing in previous studies. (ahajournals.org)
  • acute
  • Accordingly, we sought to determine the effect of an acute elevation in sympathetic tone (cold pressor test, CPT) on both the ischemia-induced dilation of resistance vessels and the conduit artery response in the popliteal artery of young vs. older women, as the effect of age on lower-limb sympatholysis has not been characterized in women. (physiology.org)
  • regulates
  • Akt/protein kinase B regulates metabolism and growth/muscle hypertrophy, but contraction effects on this target and its substrates are varied and may depend on the mode of the contractile stimulus. (biomedsearch.com)
  • metabolic
  • In fact, the BAT-specific decrease in thyroid hormone signaling seen in the D2KO mouse is sufficient to trigger a compensatory increase in BAT sympathetic activity during cold exposure, upregulating a series of T3-responsive metabolic parameters in the tissue, including UCP1 mRNA levels ( 7 ). (diabetesjournals.org)