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Related Experiment Videos

Rhythmic sympathetic discharges and 'escape behaviour'

J E Smith1, M P Gilbey

  • 1Autonomic Neuroscience Institute, Department of Physiology, Royal Free and University College Medical School, Rowland Hill Street, London NW3 2PF, UK.

Brain Research
|November 7, 1998
PubMed
Summary
This summary is machine-generated.

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Rhythmical discharges in sympathetic nerves to the tail artery persist after cutting nerve inputs. This suggests these nerve signals are not local responses or related to escape behavior.

Area of Science:

  • Neuroscience
  • Physiology

Background:

  • Single postganglionic sympathetic neurones (PSNs) innervate the caudal ventral tail artery (CVA).
  • Rhythmical discharges from these neurones are a known physiological phenomenon.

Purpose of the Study:

  • To investigate the origin of rhythmical discharges in PSNs innervating the CVA.
  • To determine if these discharges are a local sympathetic response or related to escape behavior.

Main Methods:

  • Recording of single PSN activity in anaesthetised rats.
  • Sectioning of afferent nerve pathways from the tail and hindquarters.

Main Results:

  • Characteristic rhythmical discharges from PSNs innervating the CVA were still recordable after afferent sectioning.

Related Experiment Videos

  • The nerve signals persisted irrespective of input from the tail and hindquarters.

    • Conclusions:

    • The rhythmical discharges are not a 'local sign' sympathetic response.
    • These discharges are not a sympathetic correlate of 'escape behaviour'.