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Related Experiment Video

Updated: Mar 31, 2026

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
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Dysphagia Post Subcortical and Supratentorial Stroke.

Ping Wan1, Xuhui Chen2, Lequn Zhu3

  • 1Department of Speech and Hearing Rehabilitation, Shanghai University of Traditional Chinese Medicine, Shanghai, China.

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|October 29, 2015
PubMed
Summary

Subcortical and supratentorial strokes often cause pharyngeal dysphagia, including pyriform sinus residue (PSR) and pharyngeal delay. Cricopharyngeal muscle achalasia (CMA) is a primary cause of PSR in these patients.

Keywords:
Subcortical and supratentorial strokecricopharyngeal muscle achalasiadysphagiapharyngeal delay

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Area of Science:

  • Neurology
  • Swallowing Disorders
  • Neurorehabilitation

Background:

  • Subcortical and supratentorial brain lesions can impair both voluntary and involuntary swallowing functions.
  • Previous research indicates a link between brain damage in these regions and dysphagia.

Purpose of the Study:

  • To investigate the specific characteristics of dysphagia in patients following subcortical and supratentorial stroke.
  • To identify the prevalence and nature of swallowing difficulties in this patient population.

Main Methods:

  • A cohort of 12 patients with first or second subcortical/supratentorial stroke was studied.
  • Stroke location was confirmed using CT and MRI scans.
  • Swallowing function was assessed using videofluoroscopic swallowing assessment (VFSA) and fiberoptic endoscopic evaluation of swallowing (FEES), analyzing parameters like oral transit time, pharyngeal delay, cricopharyngeal muscle achalasia (CMA), laryngeal elevation, vallecular residue, pyriform sinus residue (PSR), and pharyngeal contraction.

Main Results:

  • 83% of patients exhibited pharyngeal dysphagia.
  • 50% of patients had significant pyriform sinus residue (PSR) (50-100%), and 50% experienced pharyngeal delay.
  • 41.6% of cases showed cricopharyngeal muscle achalasia (CMA), which was strongly correlated with PSR.
  • Pharyngeal delay was linked to infarcts in the basal ganglia/thalamus, sensory tracts, or swallowing motor pathways.

Conclusions:

  • Subcortical and supratentorial strokes frequently lead to pharyngeal dysphagia, manifesting as PSR and pharyngeal delay.
  • Cricopharyngeal muscle achalasia (CMA) is identified as the primary cause of pyriform sinus residue (PSR) in stroke patients.