HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal My Folders Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Martin-Harris, B. Articles by Walters, B. Search for Related Content PubMed PubMed Citation Articles by Martin-Harris, B. Articles by Walters, B. Social Bookmarking                         What's this?

Delayed Initiation of the Pharyngeal Swallow: Normal Variability in Adult Swallows

Martin B. Brodsky
Medical University of South Carolina and University of Pittsburgh

Yvonne Michel
Fu-Shing Lee
Bobby Walters
Medical University of South Carolina

Contact author: Bonnie Martin-Harris, Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, Suite 1141, Charleston, SC 29425. E-mail: harrisbm{at}musc.edu.

Purpose: The purpose of this investigation was to determine bolus head timing and location relations with the onset of hyoid movement at the initiation of the pharyngeal swallow and at the onset of swallow-related apnea.

Method: Bolus head timing and location and the timing of swallow-related apnea were recorded from frame-by-frame analyses of 5-ml single liquid swallows using dual-modality videofluoroscopy and nasal airflow recordings in 82 consecutive, healthy volunteers. The presence, depth, and response to airway entry were also recorded and related to the bolus head location and the onset of hyoid movement.

Results: The majority of participants—80% on at least 1 trial—produced the onset of hyoid movement at pharyngeal swallow initiation after the bolus head passed the posterior angle of the mandible. There was a trend in older participants for later onset of hyoid movement and onset of apnea relative to bolus head arrival at the posterior angle of the mandible.

Conclusion: Although entry of the bolus head into the pharynx prior to hyoid movement may result in a threat to the laryngeal airway, these data demonstrate that a "delay" by itself cannot be assumed to indicate a disordered swallow without coexisting impairments of swallowing physiology.

KEY WORDS: pharyngeal delay, breathing, swallowing, deglutition, apnea

CiteULike    Connotea    Del.icio.us    Digg    Facebook    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				S. K. Daniels, M. F. Schroeder, P. C. DeGeorge, D. M. Corey, A. L. Foundas, and J. C. Rosenbek Defining and Measuring Dysphagia Following Stroke Am J Speech Lang Pathol, February 1, 2009; 18(1): 74 - 81. [Abstract] [Full Text] [PDF]

				S. K. Daniels The Basic Science of Deglutition: Application to the Clinical World Swallowing and Swallowing Disorders (Dysphagia) , December 1, 2008; 17(4): 149 - 153. [Abstract] [Full Text] [PDF]