Presented at the American Laryngological Association 2013 Spring Meeting, Orlando, Florida, U.S.A., April 10, 2013.
Contribution of the pharyngeal plexus to vocal cord adduction
Version of Record online: 19 SEP 2013
Copyright © 2013 The American Laryngological, Rhinological and Otological Society, Inc.
Volume 124, Issue 2, pages 516–521, February 2014
How to Cite
Matsuzaki, H., Paskhover, B. and Sasaki, C. T. (2014), Contribution of the pharyngeal plexus to vocal cord adduction. The Laryngoscope, 124: 516–521. doi: 10.1002/lary.24345
This work was supported in part by the Charles W. Ohse Endowment and the Virginia Alden Wright Endowment.
The authors have no other funding, financial relationships, or conflicts of interest to disclose.
- Issue online: 21 JAN 2014
- Version of Record online: 19 SEP 2013
- Accepted manuscript online: 8 AUG 2013 07:33AM EST
- Manuscript Accepted: 15 JUL 2013
- Manuscript Revised: 11 JUN 2013
- Manuscript Received: 7 FEB 2013
- Pharyngeal plexus;
- vocal cord adduction;
The aim of this study was to elucidate whether the pharyngeal plexus (PP) contributes to vocal cord adduction in the porcine model.
Thyroarytenoid (TA) muscle contraction was recorded electromyographically with electrical stimulation of the internal branch of the superior laryngeal nerve (iSLN) and PP in seven pigs.
Glottic closure reflex (GCR) was detected with stimulation of the iSLN in all subjects. Electrical stimulation of the PP elicited a response from the TA in six of the seven pigs. In one subject, TA electromyography (EMG) mean latency was noted to be 18.8 msec, approximating that of GCR elicited by iSLN stimulation. Antidromic nerve pulses generated the responses from the TA with a medium latency (mean, 6.32 msec) in three of the seven pigs. TA EMG with a short latency (mean, 1.8 msec) was identified in two of the seven pigs.
Electrical stimulation of both central and distal ends of the PP elicited vocal cord adduction. These results support the promise of future rehabilitative uses of the PP to treat dysfunctions of the iSLN or as a means of addressing many age-related or metabolic causes of protective laryngeal paresis.
Level of Evidence
NA Laryngoscope, 124:516–521, 2014