We determined the extent of convergence of preganglionic fibers from the right and left vagus nerves on postganglionic neurons that supply the sinoatrial node in chloralose-anesthetized dogs. We administered hemicholinium-3 and stimulated the right vagus nerve at a high frequency to deplete acetylcholine from the postganglionic parasympathetic neurons supplied by that nerve. We compared the eff...

The receptor sites and nerve pathways involved in the reflex production of laryngospasm have been investigated in the cat. The trigeminal nerves and the internal branch of the superior laryngeal nerves were shown to provide an afferent pathway for the reflex when the nasopharynx and larynx were exposed to ether vapour. Evidence was obtained suggesting that the recurrent laryngeal nerves may for...

The first contribution to the knowledge of the nervous control of glycemia was made by Claude Bernard who showed that hyperglycemia follows piq#{252}re of the floor of the fourth ventricle. It is not improbable that in such a procedure the vagus nerve would be affected due to close proximity of its nucleus to the site of injury. PflUger (22) found that destruction of the nerves leading to the p...

Activation of the parasympathetic pathway leads to negative chronotropic, dromotropic, and inotropic changes of heart function. The ability to selectively stimulate certain superficial compartments of peripheral nerves has been demonstrated previously. The aim of the present study was to find a clinically acceptable selective biphasic vagus nerve stimulation technique, which could allow gradual...

The electrocardiographic records taken during vagus stimulation by pressure from children suffering with chronic heart disease have shown that the stimulation of the vagi in these cases is strikingly effectual. In some of the cases, a definite difference was demonstrated between the action of the right and left vagi. The control of the rate of the heart-beat seemed to predominate usually in the...

FiG. 1. Effects of strychnine (100 tcg/kg, i.v.), mephenesin (30 mg/kg), pentobarbital (15 mg/kg), GABA (200 mg/kg) on the reflex response of the right cervical vagus nerve. In each series of record from above downwards : reflex responses to the stimulation of the left cervical vagus, great splanchnic and sciatic nerves. Strychnine (A) augmented and mephenesin (B) reduced mainly the reflex resp...

Four cases of schwannoma originating from the lower cranial nerves are presented. Case 1 is a schwannoma of the vagus nerve in the parapharyngeal space. The operation was performed by the transcervical approach. Although the tumor capsule was not dissected from the vagus nerve, hoarseness and dysphagia happened transiently after the operation. Case 2 is a schwannoma in the jugular foramen. The ...

Opportunities and Prospects Authors: V. Pokrovskii Affiliations: Kuban State Medical University, Department of Normal Physiology, Sedin Street, 4, 350063, Krasnodar, Russia, [email protected] , http://www.pokrovskii.kuban.ru. Abstract: In this article the example of the mechanisms of heart rhythmogenesis in the intact organism to demonstrate the new capabilities provided by an integrative a...