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Interrelations between contracting striated muscle and precapillary microvessels.

Publication ,  Journal Article
Gorczynski, RJ; Klitzman, B; Duling, BR
Published in: Am J Physiol
November 1978

Arterioles and capillaries in the hamster cremaster muscle were observed during electrical stimulation of striated muscle fibers in order to characterize the microcirculatory basis of functional hyperemia. When contraction was restricted to single muscle fibers, responses were variable and frequently transient. Stimulation of either small bundles of muscle fibers or the entire cremaster muscle resulted in reproducible responses typified by: 1) a latency period, 2) an early, often transient phase of dilation, and 3) a second, slower phase of dilation. The latency varied inversely with contraction frequency, and the magnitude of the dilation varied directly with contraction frequency over the range 1--8/s. With stimulation of single fibers and small groups of fibers, arteriolar vasodilation was highly localized to regions of the arterioles that were in close apposition to the stimulated fibers. The number of capillaries with red blood cell flow increased during contraction, and the increase was graded with contraction frequency. The changes observed suggest that the vascular response during functional hyperemia is a two-part process and that the control processes are influenced by contraction frequency.

Duke Scholars

Published In

Am J Physiol

DOI

ISSN

0002-9513

Publication Date

November 1978

Volume

235

Issue

5

Start / End Page

H494 / H504

Location

United States

Related Subject Headings

  • Vasodilation
  • Vascular Resistance
  • Time Factors
  • Muscles
  • Muscle Contraction
  • Mesocricetus
  • Cricetinae
  • Cardiovascular System & Hematology
  • Capillaries
  • Arterioles
 

Citation

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Gorczynski, R. J., Klitzman, B., & Duling, B. R. (1978). Interrelations between contracting striated muscle and precapillary microvessels. Am J Physiol, 235(5), H494–H504. https://doi.org/10.1152/ajpheart.1978.235.5.H494
Gorczynski, R. J., B. Klitzman, and B. R. Duling. “Interrelations between contracting striated muscle and precapillary microvessels.Am J Physiol 235, no. 5 (November 1978): H494–504. https://doi.org/10.1152/ajpheart.1978.235.5.H494.
Gorczynski RJ, Klitzman B, Duling BR. Interrelations between contracting striated muscle and precapillary microvessels. Am J Physiol. 1978 Nov;235(5):H494–504.
Gorczynski, R. J., et al. “Interrelations between contracting striated muscle and precapillary microvessels.Am J Physiol, vol. 235, no. 5, Nov. 1978, pp. H494–504. Pubmed, doi:10.1152/ajpheart.1978.235.5.H494.
Gorczynski RJ, Klitzman B, Duling BR. Interrelations between contracting striated muscle and precapillary microvessels. Am J Physiol. 1978 Nov;235(5):H494–H504.

Published In

Am J Physiol

DOI

ISSN

0002-9513

Publication Date

November 1978

Volume

235

Issue

5

Start / End Page

H494 / H504

Location

United States

Related Subject Headings

  • Vasodilation
  • Vascular Resistance
  • Time Factors
  • Muscles
  • Muscle Contraction
  • Mesocricetus
  • Cricetinae
  • Cardiovascular System & Hematology
  • Capillaries
  • Arterioles