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Related Experiment Videos

Volume accommodation during swallowing

P J Kahrilas1, J A Logemann

  • 1Department of Medicine, Northwestern University, Chicago, Illinois.

Dysphagia
|January 1, 1993
PubMed
Summary

Swallowing larger volumes involves distinct biomechanical adjustments. Larger boluses extend the time for pharyngeal reconfiguration and increase expulsion vigor, altering the swallow

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Area of Science:

  • Biomechanics of swallowing
  • Oropharyngeal physiology

Background:

  • Bolus volume significantly influences the biomechanical events of the oropharyngeal swallow.
  • Swallowing involves pharyngeal reconfiguration and bolus transport into the esophagus.

Purpose of the Study:

  • To investigate how different bolus volumes modify the biomechanical events of the oropharyngeal swallow.
  • To differentiate the accommodation strategies for pharyngeal reconfiguration and bolus propulsion.

Main Methods:

  • Analysis of biomechanical events during swallowing of varying bolus volumes.
  • Observation of pharyngeal reconfiguration and bolus transport dynamics.
  • Fluoroscopic assessment of swallow appearance with different volumes.

Main Results:

  • Larger bolus volumes lead to sustained laryngeal elevation and hyoid excursion, allocating more time for pharyngeal reconfiguration.
  • Bolus expulsion for larger volumes is achieved through increased vigor within a similar timeframe.
  • Fluoroscopic appearance differs significantly between small and large volume swallows due to these accommodations.

Conclusions:

  • Volume accommodation in swallowing utilizes distinct strategies for reconfiguration and propulsion.
  • The observed differences in swallow appearance are primarily related to bolus characteristics rather than swallow duration.
  • Understanding these biomechanical adaptations is crucial for assessing swallowing function.

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