Journal of Applied Physiology Watch the video to see how APS reaches out to developing nations.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 62: 946-951, 1987;
8750-7587/87 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
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 Speck, D. F.
Right arrow Articles by Revelette, W. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Speck, D. F.
Right arrow Articles by Revelette, W. R.

Journal of Applied Physiology, Vol 62, Issue 3 946-951, Copyright © 1987 by American Physiological Society

ARTICLES

Excitation of dorsal and ventral respiratory group neurons by phrenic nerve afferents

D. F. Speck and W. R. Revelette

The projections of phrenic nerve afferents to neurons in the dorsal (DRG) and ventral (VRG) respiratory group were studied in anesthetized, paralyzed, and vagotomized cats. Extracellular recordings of neuronal responses to vagal nerve and cervical phrenic nerve stimulation (CPNS) indicated that about one-fourth of the DRG respiratory-modulated neurons were excited by phrenic nerve afferents with an onset latency of approximately 20 ms. In addition, non-respiratory-modulated neurons within the DRG were recruited by CPNS. Although some convergence of vagal and phrenic afferent input was observed, most neurons were affected by only one type of afferent. In contrast to the DRG, only 3 out of 28 VRG respiratory-modulated neurons responded to CPNS. A second study determined that most of these neuronal responses were due to activation of diaphragmatic afferents since 90% of the DRG units activated by CPNS were also excited at a longer latency by thoracic phrenic nerve stimulation. The difference in onset latency of neuronal excitation indicates an afferent peripheral conduction velocity of about 10 m/s, which suggests that they are predominately small myelinated fibers (group III) making paucisynaptic connections with DRG neurons. Decerebration, decerebellation, and bilateral transection of the dorsal columns at C2 do not abolish the neuronal responses to cervical PNS.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
O. E. Malakhova and P. W. Davenport
c-Fos expression in the central nervous system elicited by phrenic nerve stimulation
J Appl Physiol, April 1, 2001; 90(4): 1291 - 1298.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
A. De Troyer, E. Brunko, D. Leduc, and Y. Jammes
Reflex inhibition of canine inspiratory intercostals by diaphragmatic tension receptors
J. Physiol., January 1, 1999; 514(1): 255 - 263.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
A. De Troyer
The canine phrenic-to-intercostal reflex
J. Physiol., May 1, 1998; 508(3): 919 - 927.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online