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Updated: Feb 6, 2026
10:48
Assessing Myogenic Response and Vasoactivity In Resistance Mesenteric Arteries Using Pressure Myography
Published on: July 6, 2015
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The myogenic response in the microcirculation and its interaction with other control systems
1Department of Physiology, University of Arizona, Tucson 85724.
Summary
The myogenic response, an arteriole constriction to increased intravascular pressure, helps regulate blood flow and maintain constant capillary pressure. This mechanism is crucial for microcirculatory autoregulation.
Area of Science:
- Physiology
- Microcirculation
- Vascular Biology
Background:
- The myogenic response is a critical mechanism in regulating blood flow within the microcirculation.
- Evidence for this response has been observed across various microcirculatory preparations.
Purpose of the Study:
- To investigate the role of the myogenic response in microcirculatory preparations.
- To understand how intravascular pressure changes affect arteriolar constriction and blood flow.
Main Methods:
- Studies involved controlled elevation of arterial and/or venous pressure in microcirculatory preparations.
- Observations focused on arteriolar diameter changes, blood flow, and tissue oxygen tension.
Main Results:
- Increased intravascular pressure induced arteriolar constriction in many, but not all, vascular beds.
- This constriction occurred even with reduced blood flow and tissue oxygen tension.
- Evidence suggests individual arterioles respond to pressure, with responses modulated by neighboring vessels.
Conclusions:
- The myogenic response appears to be an intrinsic property of arterioles, potentially regulated by wall tension.
- Arteriolar network organization facilitates autoregulation of blood flow during pressure fluctuations.
- The myogenic response contributes to maintaining stable capillary pressure.
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