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Identification of Swallowing Patterns Associated with Dysphagia

Mark Mizuko, Rachel Komarek, John Hatten,
(University of Minnesota Duluth)

Joe Piette & Peggy Stone
(St.Mary's/Duluth Clinic Health Systems) 

UM Technology Enhanced Learning Project Description

Information about using QuickTime technology presented at TechFest 2001

 If you have difficulty viewing the video samples, you may need to download Quicktime at

Times since June 1, 1998 this page has been accessed: 206277 



Normal Swallow

In order for students in the field of Speech Pathology to understand, diagnose and provide treatment for persons with dysphagia, there must first be a thorough understanding of a "normal" swallow.

The act of deglutition is divided into four phases:

  1. Oral Preparatory Phase - food is manipulated in the mouth and masticated (chewed) if necessary in order to reduce food to a consistency which can be swallowed.
  2. Oral Phase - the tongue propels food posteriorly until the pharyngeal swallow is triggered.
  3. Pharyngeal Phase - once the pharyngeal swallow is triggered, the bolus (cohesive ball of food) is transported through the pharynx.
  4. Esophageal Phase - esophageal peristalsis carries the bolus from the cricopharyngeal juncture or upper esophageal sphincter (UES) through the esophagus to the Lower Esophageal Sphincter (LES).

This tutorial will allows the student to view the first three phases of swallowing via Videofluoroscopy.

Videofluoroscopy Segments:


Disordered Swallowing

Videofluoroscopy Segments:

NEW TUTORIAL on Computerized Image Processing in Swallowing Analysis


Special thanks to St.Mary's/Duluth Clinic Health Systems(SMDC) Radiology and Speech Pathology departments for providing the videofluroscopy studies of the normal adult.

Copyright (C) 1998, Regents of the University of Minnesota. All rights reserved. For additional information, please contact Mark I. Mizuko.



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