The effect of surface electrical stimulation on hyolaryngeal movement in normal individuals at rest and during swallowing

Ianessa A. Humbert, Christopher J. Poletto, Keith G. Saxon, Pamela R. Kearney, Lisa Crujido, Wilhelmina Wright-Harp, Joan Payne, Neal Jeffries, Barbara C. Sonies, Christy L. Ludlow

Research output: Contribution to journalArticle

Abstract

Surface electrical stimulation is currently used in therapy for swallowing problems, although little is known about its physiological effects on neck muscles or swallowing. Previously, when one surface electrode placement was used in dysphagic patients at rest, it lowered the hyolaryngeal complex. Here we examined the effects of nine other placements in normal volunteers to determine 1) whether movements induced by surface stimulation using other placements differ, and 2) whether lowering the hyolaryngeal complex by surface electrical stimulation interfered with swallowing in healthy adults. Ten bipolar surface electrode placements overlying the submental and laryngeal regions were tested. Maximum tolerated stimulation levels were applied at rest while participants held their mouths closed. Videofluoroscopic recordings were used to measure hyoid bone and subglottic air column (laryngeal) movements from resting position and while swallowing 5 ml of liquid barium, with and without stimulation. Videofluoroscopic recordings of swallows were rated blind to condition using the National Institutes of Health-Swallowing Safety Scale. Significant (P <0.0001) laryngeal and hyoid descent occurred with stimulation at rest. During swallowing, significant (P <0.01) reductions in both the larynx and hyoid bone peak elevation occurred during stimulated swallows. The stimulated swallows were also judged less safe than nonstimulated swallows using the National Institutes of Health-Swallowing Safety Scale (P = 0.0275). Because surface electrical stimulation reduced hyolaryngeal elevation during swallowing in normal volunteers, our findings suggest that surface electrical stimulation will reduce elevation during swallowing therapy for dysphagia.

Original languageEnglish (US)
Pages (from-to)1657-1663
Number of pages7
JournalJournal of Applied Physiology
Volume101
Issue number6
DOIs
StatePublished - Dec 2006
Externally publishedYes

Fingerprint

Deglutition
Electric Stimulation
Swallows
Hyoid Bone
National Institutes of Health (U.S.)
Healthy Volunteers
Electrodes
Neck Muscles
Safety
Barium
Deglutition Disorders
Larynx
Mouth
Air
Therapeutics

Keywords

  • Dysphagia
  • Neck muscles
  • Neuromuscular stimulation
  • Videofluoroscopy

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Humbert, I. A., Poletto, C. J., Saxon, K. G., Kearney, P. R., Crujido, L., Wright-Harp, W., ... Ludlow, C. L. (2006). The effect of surface electrical stimulation on hyolaryngeal movement in normal individuals at rest and during swallowing. Journal of Applied Physiology, 101(6), 1657-1663. https://doi.org/10.1152/japplphysiol.00348.2006

The effect of surface electrical stimulation on hyolaryngeal movement in normal individuals at rest and during swallowing. / Humbert, Ianessa A.; Poletto, Christopher J.; Saxon, Keith G.; Kearney, Pamela R.; Crujido, Lisa; Wright-Harp, Wilhelmina; Payne, Joan; Jeffries, Neal; Sonies, Barbara C.; Ludlow, Christy L.

In: Journal of Applied Physiology, Vol. 101, No. 6, 12.2006, p. 1657-1663.

Research output: Contribution to journalArticle

Humbert, IA, Poletto, CJ, Saxon, KG, Kearney, PR, Crujido, L, Wright-Harp, W, Payne, J, Jeffries, N, Sonies, BC & Ludlow, CL 2006, 'The effect of surface electrical stimulation on hyolaryngeal movement in normal individuals at rest and during swallowing', Journal of Applied Physiology, vol. 101, no. 6, pp. 1657-1663. https://doi.org/10.1152/japplphysiol.00348.2006
Humbert, Ianessa A. ; Poletto, Christopher J. ; Saxon, Keith G. ; Kearney, Pamela R. ; Crujido, Lisa ; Wright-Harp, Wilhelmina ; Payne, Joan ; Jeffries, Neal ; Sonies, Barbara C. ; Ludlow, Christy L. / The effect of surface electrical stimulation on hyolaryngeal movement in normal individuals at rest and during swallowing. In: Journal of Applied Physiology. 2006 ; Vol. 101, No. 6. pp. 1657-1663.
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