Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Cerebral microcirculatory changes during exposure to hypoxia.

P Weinbrecht1, I Longmuir, J Knopp

  • 1Department of Biochemistry, North Carolina State University, Raleigh 27695-7622.

Advances in Experimental Medicine and Biology
|January 1, 1987
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Improved quantum processor logical error rates via correction and detection.

Nature·2026
Same author

Digital quantum magnetism on a trapped-ion quantum computer.

Nature·2026
Same author

Atomic origins of dislocation pinning in oxide dispersion strengthened alloys.

Journal of physics. Condensed matter : an Institute of Physics journal·2025
Same author

The Europa Imaging System (EIS) Investigation.

Space science reviews·2024
Same author

High-fidelity teleportation of a logical qubit using transversal gates and lattice surgery.

Science (New York, N.Y.)·2024
Same author

The utility of dynamic contrast-enhanced intranodal magnetic resonance lymphangiography (MRL) in the investigation of primary lymphatic anomalies.

Clinical radiology·2024

Cat brain capillaries independently respond to low oxygen levels (hypoxia) before larger blood vessels. This suggests a unique localized response mechanism in cerebral circulation during reduced oxygen.

Area of Science:

  • Neuroscience
  • Physiology
  • Vascular Biology

Background:

  • Cerebral blood flow regulation is crucial for brain function.
  • Hypoxia, or low oxygen levels, triggers complex vascular responses.
  • The role of capillaries versus arterioles in the initial hypoxic response is not fully understood.

Purpose of the Study:

  • To investigate the independent response of cat cerebral cortical capillaries to hypoxia.
  • To determine the threshold of arterial oxygen tension triggering vascular changes.
  • To compare the timing of red blood cell content changes in capillaries versus arterioles.

Main Methods:

  • Monitoring red blood cell content in cat cerebral cortical vessels using reflecting light.
  • Systematically decreasing the partial pressure of inspired oxygen (PIO2).

Related Experiment Videos

  • Correlating changes in red blood cell content with arterial oxygen tension.

    • Main Results:

    • Capillary red blood cell content increased during hypoxia before arteriole response at 52.0 mmHg.
    • Below 52 mmHg, red blood cell content increased in all vessels simultaneously.
    • Decreasing PIO2 led to earlier red blood cell content increases across all vessel types.

    Conclusions:

    • Cat cerebral cortical capillaries can respond to hypoxia independently of arterioles.
    • This finding highlights a distinct microvascular regulatory mechanism in the brain.
    • Capillary-level responses may play a significant role in initial oxygen homeostasis.