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Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
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Investigation of Embodied Language Processing on Command-Swallow Performance in Healthy Participants.

Atsuko Kurosu1,2, Sheila R Pratt1,3, Catherine Palmer1,4

  • 1University of Pittsburgh, PA.

Journal of Speech, Language, and Hearing Research : JSLHR
|December 17, 2020
PubMed
Summary
This summary is machine-generated.

The word "swallow" speeds up swallowing initiation but prolongs muscle activity duration in healthy adults. This suggests language can influence swallowing control, potentially aiding those with swallowing difficulties.

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Area of Science:

  • Neuroscience
  • Speech and Hearing Science
  • Biomechanics

Background:

  • Videofluoroscopic swallowing examinations often use a "command swallow" to time bolus intake.
  • The language-induced motor facilitation theory posits that verbal commands can enhance voluntary swallowing.
  • Understanding linguistic influences on swallowing is crucial for clinical assessment and intervention.

Purpose of the Study:

  • To investigate the linguistic effects of verbal commands on the motor act of swallowing.
  • To determine if specific words or sounds influence swallowing timing and muscle activity.

Main Methods:

  • Twenty healthy adults participated in the study.
  • Participants swallowed a liquid bolus after hearing one of five acoustic stimuli: 'swallow', 'cough', 'spallow', 'pough', or a pure tone.
  • Suprahyoid muscle activity was measured using surface electromyography (sEMG).

Main Results:

  • The word 'swallow' significantly reduced the onset and peak latencies of suprahyoid muscle activity compared to non-words and pure tones.
  • Muscle activity duration and rise time were longer following the word 'swallow' compared to non-words and pure tones.
  • No significant differences were found in peak muscle activity amplitude or fall times.

Conclusions:

  • Linguistic processing, specifically the word 'swallow', demonstrably facilitates swallowing initiation.
  • While 'swallow' speeds up initiation, it also increases the duration of muscle activity.
  • Linguistic inducement may serve as a compensatory strategy for individuals with oropharyngeal swallowing impairments.