European Journal of Applied Physiology

, Volume 93, Issue 1–2, pp 124–129 | Cite as

A wide range of baroreflex stimulation does not alter forearm blood flow

  • Reuben Howden
  • J. Timothy Lightfoot
  • Michael J. Turner
  • Stephen J. Brown
  • Ian L. Swaine
Original Article

Abstract

The contribution to the regulation of forearm blood flow (FBF) by different baroreceptor populations has previously only been studied over a limited range of stimuli. Therefore, FBF and R-R interval were recorded during neck suctions and neck pressures ranging from −60 to +40 mmHg. The change in R-R interval (ΔR-R) during neck suction was significantly increased at each stage when compared to the control (P<0.05). ΔR-R did not show any significant change during any of the neck pressure stages (P>0.05). Suction or pressure applied to the neck did not elicit any significant changes in FBF when compared to the control (P>0.05). These data show that widening the range of applied stimuli to carotid sinus baroreceptors does not induce a change in FBF. However, the small transient changes reported previously cannot be discounted.

Keywords

Carotid sinus baroreflex Neck chamber Venous occlusion plethysmography 

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Reuben Howden
    • 1
    • 4
  • J. Timothy Lightfoot
    • 2
  • Michael J. Turner
    • 2
  • Stephen J. Brown
    • 1
  • Ian L. Swaine
    • 3
  1. 1.Physiology of ExerciseDe Montfort UniversityBedfordUK
  2. 2.Department of Health Promotion and KinesiologyUniversity of North CarolinaCharlotteUSA
  3. 3.Canterbury Christ Church University CollegeCanterburyUK
  4. 4.National Institute of Environmental Health SciencesNational Institutes of HealthResearch Triangle ParkUSA

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