Journal of Applied Physiology Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 88: 282-290, 2000;
8750-7587/00 $5.00
This Article
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
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
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
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 ISI Web of Science (8)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Daubenspeck, J. A.
Right arrow Articles by Akay, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Daubenspeck, J. A.
Right arrow Articles by Akay, M.
Vol. 88, Issue 1, 282-290, January 2000

Global field power helps separate respiratory-related evoked potentials from EMG contamination

J. Andrew Daubenspeck1,2, Lisa M. Lim1, and Metin Akay2

1 Department of Physiology, Dartmouth Medical School, and 2 Thayer School of Engineering, Dartmouth College, Lebanon, New Hampshire 03756

Respiratory-related evoked potentials (RREPs) were stimulated by brief (200-ms) oral pressure pulses (-10 cmH2O) applied at the onset of inspiration in 12 subjects. Scalp potentials were measured at 30 sites on a rectangular grid that encompassed the right side of the scalp overlying the somatosensory cortex (SSC). Concurrent and significant masseter EMG (mEMG) activity was evoked by the pressure pulse, and we found correlational evidence for contamination of the RREP by the mEMG. The global field power (GFP) was used to provide a robust, reference-independent measure of SSC activation that provided partial insulation from mEMG contamination. The mean GFP from all subjects, reflective of afferent information from respiratory mechanoreceptors, showed a latency to onset of significant afferent SSC activity of ~25 ms. Scalp GFP activity during control experiments (absence of applied pressure) was significant and may reflect ongoing afferent activity from inspiration.

respiratory sensation; respiratory afferents; somatosensory cortex; masseter muscle electromyography


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
M. Akay, J. C. Leiter, and J. A. Daubenspeck
Reduced respiratory-related evoked activity in subjects with obstructive sleep apnea syndrome
J Appl Physiol, February 1, 2003; 94(2): 429 - 438.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. A. Daubenspeck, H. L. Manning, and J. C. Baird
Midlatency respiratory-related somatosensory activity and perception of oral pressure pulses in normal humans
J Appl Physiol, June 1, 2001; 90(6): 2048 - 2056.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. A. Daubenspeck, H. L. Manning, and M. Akay
Contribution of supraglottal mechanoreceptor afferents to respiratory-related evoked potentials in humans
J Appl Physiol, January 1, 2000; 88(1): 291 - 299.
[Abstract] [Full Text] [PDF]


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