JDR JDR Most Cited Articles
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ono, T.
Right arrow Articles by Nakamura, Y.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ono, T.
Right arrow Articles by Nakamura, Y.

Journal of Dental Research, Vol 78, 1720-1726, Copyright © 1999 by International & American Associations for Dental Research Online Journals

ARTICLES

Suppression of jaw-opening and trigemino-hypoglossal reflexes during swallowing in the cat

T. Ono, Y. Ishiwata, T. Kuroda and Y. Nakamura
Second Department of Orthodontics, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.

Jaw-opening and trigemino-hypoglossal reflexes can be evoked by innocuous as well as noxious afferents from intra-oral structures. It has been reported that the amplitude of the jaw-opening reflex evoked by weak electrical stimulation of the upper lip is subject not only to tonic suppression but also to phase-linked modulation during mastication. In this study, we investigated whether the jaw-opening and trigemino-hypoglossal reflexes are modulated during swallowing. Data were obtained from 8 chloralose-anesthetized cats. Reflexes were monitored by electromyographic activities recorded from the anterior digastric, genioglossus, and styloglossus muscles and, after paralysis, by the efferent discharge in the digastric and hypoglossal nerves. Swallowing was elicited either by water dropped on the tongue or by repetitive stimulation of the superior laryngeal nerve. Jaw-opening and trigemino-hypoglossal reflexes were evoked by stimulation of the lingual nerve, and the evoked afferent volley was recorded from the Gasserian ganglion so that the threshold of the lingual nerve could be determined. The following results were obtained: (1) The jaw-opening and trigemino-hypoglossal reflexes evoked by stimulation of the low-threshold, but not high-threshold, lingual afferents were remarkably suppressed during swallowing; and (2) both the jaw-opening and trigemino-hypoglossal reflexes evoked by low-threshold lingual afferents were suppressed during fictive swallowing after the animals were paralyzed. We conclude that the jaw-opening and trigemino-hypoglossal reflexes evoked by low-threshold lingual afferents are suppressed during swallowing by a central motor program.


This article has been cited by other articles:


Home page
 Crit. Rev. Oral Biol. Med.Home page
A.J. Miller
ORAL AND PHARYNGEAL REFLEXES IN THE MAMMALIAN NERVOUS SYSTEM: THEIR DIVERSE RANGE IN COMPLEXITY AND THE PIVOTAL ROLE OF THE TONGUE
Crit. Rev. Oral. Biol. Med., September 1, 2002; 13(5): 409 - 425.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
IADR Journals Advances in Dental Research ®
Journal of Dental Research ® Critical Reviews (1990-2004)
Copyright © 1999 Institutional Access Guidelines