Effect of cervical sympathetic nerve stimulation on nociceptive jaw opening reflex in the cat.
In anaesthetized cats the electrical stimulation of the cervical sympathetic nerve induces a considerable increase (150-250%) in the nociceptive jaw opening reflex elicited by tooth pulp stimulation (JOR). The mechanisms potentially responsible for this effect are discussed and the possibility is suggested, that a portion of the response is due to a modulatory action exerted by the sympathetic on the nociceptive input.
Institute of Human Physiology, Catholic University Sacro Cuore, Rome, Italy.
C
C
Grassi
M
M
Passatore
D000818:Animals; D002415:Cats; D003782:Dental Pulp / Q000502:physiology; D004558:Electric Stimulation; D007568:Jaw / Q000502:physiology*; D009333:Neck / Q000294:innervation*; D009619:Nociceptors / Q000502:physiology*; D012018:Reflex / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology*