Swallowing Mechanism
Swallowing Mechanism - Related Videos
14:13
Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing
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Cited by 34 •
2014
Coordinate mapping is a method of documenting salient features of hyolaryngeal biomechanics in the pharyngeal phase of swallowing. This methodology uses image analysis software to record coordinates of anatomical landmarks. These coordinates are imported into an excel macro and translated into kinematic variables of interest useful in dysphagia research.
08:32
Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
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Cited by 53 •
2015
This study successfully adapted human videofluoroscopic swallowing study (VFSS) methods for use with murine disease models for the purpose of facilitating translational dysphagia research.
07:45
Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
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2023
This protocol describes a serial transoral laryngoscopy approach for mice and rats that permits close-up, unobstructed video imaging of the larynx during breathing and swallowing using an optimized anesthetic regimen and finely tuned endoscopic manipulation techniques.
01:24
Upper GI Series: Barium Swallow
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2025
The Barium Swallow Study, or a Barium Esophagogram, is a diagnostic imaging method used to visualize the upper gastrointestinal (GI) tract, including the esophagus, stomach, and small intestine. It employs barium sulfate, a radiopaque contrast material, to provide clear images of the upper digestive system, helping to identify abnormalities, diseases, or structural issues. Purpose and Procedure Patients undergoing this procedure ingest a liquid containing barium sulfate with a chalky...
12:45
Mechanical Stimulation of Chondrocyte-agarose Hydrogels
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Cited by 29 •
2012
The biosynthesis of cartilaginous extracellular matrix by chondrocytes can be affected by application of mechanical stimuli. This method describes the technique of applying dynamic compressive strains to chondrocytes encapsulated in 3D constructs and the evaluation of induced changes in chondrocyte metabolism.
FAQs
Oral preparation organizes food or liquid into a manageable bolus, while oral propulsion moves that bolus toward the pharynx. Separating these functions helps clinicians consider whether difficulty arises during organization, movement, or the transition between them. This phase-based view supports more precise localization of impaired swallowing function rather than treating all swallowing problems as identical.
Several coordinated events reduce the risk of material entering the airway. The soft palate closes the nasal passage, the larynx elevates, and the vocal folds protect the trachea. Because these actions occur as part of one pharyngeal sequence, disruption in any component can compromise respiratory safety and provide clinically relevant information about the nature of swallowing impairment.
Rhythmic esophageal contractions continue transport after the bolus has passed through the pharyngeal region. Their role is to move material toward the stomach, extending swallowing beyond the mouth and throat. Considering this later stage helps clinicians distinguish problems associated with esophageal transport from impairments involving oral preparation, propulsion, or pharyngeal airway protection.
Clinicians can compare the expected functions of each phase with the patient’s impaired performance to identify where dysphagia may arise. Problems may relate to oral preparation or propulsion, pharyngeal coordination and airway protection, or esophageal transport. This localization guides the choice of diagnostic assessment and helps connect observed dysfunction with an appropriate clinical response.
A phase-based evaluation first considers how food or liquid is prepared and propelled, then examines pharyngeal protection and subsequent esophageal transport. Clinicians use this functional framework to select diagnostic assessments that target the suspected region of impairment. The resulting information can clarify dysphagia location and support decisions about rehabilitation or safer feeding strategies.
Targeted diagnostic assessments are useful when clinicians need to determine which part of the swallowing sequence is impaired. An assessment can be selected to examine oral performance, pharyngeal airway protection, or esophageal transport, depending on the suspected problem. This approach produces more clinically relevant information than evaluating swallowing as a single undifferentiated event.
Research on swallowing links the coordinated actions of its phases with clinical outcomes such as nutrition, hydration, and respiratory safety. Understanding where coordination fails helps inform rehabilitation focused on impaired function and supports safer feeding strategies. These applications make mechanistic knowledge clinically valuable, particularly when dysphagia threatens adequate intake or airway protection.
Effective swallowing supports both delivery of food and liquid and protection of the respiratory tract. A disturbance in oral, pharyngeal, or esophageal function can therefore affect more than eating comfort, with potential consequences for nutrition, hydration, or airway safety. Clinical assessment uses these priorities to determine impairment, guide intervention, and support safer intake.