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Pflügers Archiv

, Volume 326, Issue 4, pp 324–333 | Cite as

Bulbar inhibition of spinal and supraspinal sympathetic reflex discharges

  • F. Kirchner
  • A. Sato
  • H. Weidinger
Article

Summary

  1. 1.

    In chloralose anesthetized cats, the sympathetic reflex discharge was recorded from the renal sympathetic nerve.

     
  2. 2.

    The early-spinal and late-supraspinal sympathetic reflex discharges were elicited by single electrical stimulation of the thoracic dorsal roots.

     
  3. 3.

    Increased excitation of the baroceptor afferents produced by a rise of blood pressure after injection of noradrenaline caused strong inhibitition of the latesupraspinal reflex discharge. The early-spinal reflex discharge was only rarely affected.

     
  4. 4.

    Electrical stimulation of the medullary depressor area caused inhibition of the spinal and supraspinal reflex discharges.

     
  5. 5.

    It is concluded that spinal reflex pathways receive some inhibitory descending influences from the medulla oblongata.

     

Key-Words

Renal Sympathetic Reflex Spinal Sympathetic Reflex Supraspinal Sympathetic Reflex Noradrenaline Baroceptor Afferent Stimulation Inhibitory Descending Pathways 

Schlüsselwörter

Sympathische Reflexe Spinale sympathische Reflexe Supraspinale sympathische Reflexe Noradrenalin Bulbäre depressorische Reizung Hemmende absteigende Fasern 

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Copyright information

© Springer-Verlag 1971

Authors and Affiliations

  • F. Kirchner
    • 1
  • A. Sato
    • 1
  • H. Weidinger
    • 1
  1. 1.I. Physiologisches Institut der Universität HeidelbergHeidelbergGermany

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