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Updated: Oct 25, 2025

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
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Which Physiological Swallowing Parameters Change with Healthy Aging?

Renata Mancopes1, Pooja Gandhi1,2, Sana Smaoui1,2

  • 1Swallowing Rehabilitation Research Laboratory, KITE Research Institute - Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12 floor, Toronto, Ontario, Canada, M5G 2A2.

OBM Geriatrics
|August 5, 2021
PubMed
Summary

Healthy aging involves swallowing changes, termed presbyphagia, distinct from impairment. This study identified age-related kinematic and timing alterations in healthy adults, differentiating normal aging from dysphagia.

Keywords:
Deglutitionagingkinematicspresbyphagiaswallowingvideofluoroscopy

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Area of Science:

  • Gerontology
  • Swallowing physiology
  • Deglutition biomechanics

Background:

  • Age-related swallowing changes, termed presbyphagia, are distinct from pathological impairment.
  • Understanding these normal changes is crucial for accurate clinical assessment.
  • Previous research has not fully delineated specific kinematic and timing alterations associated with healthy aging.

Purpose of the Study:

  • To investigate the influence of age on quantitative measures of healthy swallowing.
  • To differentiate specific characteristics of presbyphagia from dysphagia.
  • To control for sex and sip volume effects on swallowing parameters.

Main Methods:

  • Videofluoroscopy of thin liquid swallows in 76 healthy adults (21-82 years).
  • Analysis using the ASPEKT method for safety, efficiency, kinematics, and timing.
  • Hierarchical regression models to assess age, sex, and sip volume effects.

Main Results:

  • No age-related changes in penetration-aspiration, hyoid-burst (HYB)-to-upper-esophageal-sphincter (UES) opening interval, or pharyngeal residue.
  • Increased age correlated with longer swallow reaction time, UES opening duration, and laryngeal vestibule closure (LVC) duration.
  • Older adults exhibited larger resting and maximum pharyngeal area and wider UES diameter.

Conclusions:

  • Identified specific age-related changes in swallowing kinematics and timing (presbyphagia) in healthy adults up to 80 years.
  • Observed changes like longer UES opening and LVC duration may represent compensatory mechanisms for slower bolus transit.
  • Distinguishes normal aging swallowing characteristics from pathological impairment, aiding clinical differentiation.