Jan 1, 1977

Effects of cardiac vagotomy on heart rate conditioned responses in cats

Acta Neurobiologiae Experimentalis
A GiavelliG Santibáñez-H


Normal cats were bilaterally vagotomized at cardiac level and submitted to a classical defensive conditioning using excitatory, inhibitory and differential stimuli. That group was compared with a normal one. Both groups showed an anticipatory bradycardia to the noxious excitatory stimulus and a late deceleration to the inhibitory stimuli. The experimental group presented more variable and labile responses. Basal and intertrial heart rate decreased in normal but not in operated animals. The autonomic regulation of the conditioned bradycardia reflex is discussed according to the hypothesis that both active and passive fear reactions are fundamentally mediated by sympathetic activity.

  • References
  • Citations


  • We're still populating references for this paper, please check back later.
  • References
  • Citations


  • This paper may not have been cited yet.

Mentioned in this Paper

Vagus Nerve Structure
Heart Diseases
Reflex Action
Reflex Motion Descriptor
Autonomic Nervous System
Conditioning (Psychology)
Pulse Rate
Felis catus

About this Paper

Related Feeds


Bradyarrhythmias are slow heart rates. Symptoms may include syncope, dizziness, fatigure, shortness of breath, and chest pains. Find the latest research on bradyarrhythmias here.