|
|
||||||||
Laryngeal and Speech Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892-1416
During swallowing, airway protection is achieved in part by laryngeal elevation. Although multiple muscles are normally active during laryngeal elevation, neuromuscular stimulation of select muscles was evaluated to determine which single muscle or muscle pair best elevates the larynx and should be considered during future studies of neuromuscular stimulation in dysphagic patients. Hooked-wire monopolar electrodes were inserted into mylohyoid, thyrohyoid, and geniohyoid muscle regions in 15 healthy men selected for having a highly visible thyroid prominence for videotaping. During trials of single, bilateral, and combined muscle stimulations, thyroid prominence movements were video recorded, digitized, and normalized relative to elevation during a 2-ml water swallow. Individual muscle stimulation induced ~30% of the elevation observed during a swallow and ~50% of swallow velocity, whereas paired muscle stimulation resulted in ~50% of the elevation and ~80% of the velocity produced during a swallow. Paired muscle stimulation produced significantly greater elevation than single muscle stimulation and could assist with laryngeal elevation in dysphagic patients with reduced or delayed laryngeal elevation.
larynx; swallowing; kinematics
This article has been cited by other articles:
![]() |
I. A. Humbert, C. J. Poletto, K. G. Saxon, P. R. Kearney, L. Crujido, W. Wright-Harp, J. Payne, N. Jeffries, B. C. Sonies, and C. L. Ludlow The effect of surface electrical stimulation on hyolaryngeal movement in normal individuals at rest and during swallowing J Appl Physiol, December 1, 2006; 101(6): 1657 - 1663. [Abstract] [Full Text] [PDF] |
||||
![]() |
T. A. Burnett, E. A. Mann, J. B. Stoklosa, and C. L. Ludlow Self-Triggered Functional Electrical Stimulation During Swallowing J Neurophysiol, December 1, 2005; 94(6): 4011 - 4018. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Visit Other APS Journals Online |