Role of the carotid chemoreceptors in the hyperpnea of exercise in the cat

D. Aggarwal, H. T. Milhorn. Jr., L. Y. Lee

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The role of the carotid chemoreceptors in the hyperpnea of exercise was investigated. The activity of the sinus nerve of the cat was monitored while the blood supply to the carotid body was controlled independently of the systemic circulation. By this technique, fluctuations in the arterial blood gases during a short interval of exercise induced by electrical stimulation of hindlimb muscles were unable to affect the chemoreceptor activity. While minute ventilation increased by an average of 51%, chemoreccptor discharge was found to be unchanged in 12 experiments, 6 while perfusing with normoxic blood and 6 while perfusing with hypoxic blood. Thus, it must be concluded that alteration of carotid chemoreceptor sensitivity does not occur during artificially induced exercise in anesthetized cats. However, the difference in the time course of ventilation following the initiation of artificially induced exercise between cats and other species does not allow it to be ruled out in other species, including man. Indirect evidence is against such a role.

Original languageEnglish
Pages (from-to)147-155
Number of pages9
JournalRespiration Physiology
Issue number2
StatePublished - Apr 1976


  • Carotid chemoreceptors
  • Exercise Control of breathing
  • Hyperpnea

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine


Dive into the research topics of 'Role of the carotid chemoreceptors in the hyperpnea of exercise in the cat'. Together they form a unique fingerprint.

Cite this