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Updated: Apr 27, 2026

Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
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[Laryngeal adduction reflex].

M Ptok1, S Bonenberger1, S Miller1

  • 1Klinik und Poliklinik für Phoniatrie und Pädaudiologie, MHH, Hannover.

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|July 8, 2014
PubMed
Summary
This summary is machine-generated.

The laryngeal adductor reflex (LAR) protects the airway from aspiration. Current clinical assessment of LAR is qualitative, but quantitative testing is needed for better dysphagia diagnosis and aspiration risk evaluation.

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Area of Science:

  • Otolaryngology
  • Neurology
  • Physiology

Background:

  • A rapid vocal fold closure, the laryngeal adductor reflex (LAR), is crucial for preventing aspiration of foreign materials into the trachea.
  • Impaired LAR can lead to aspiration pneumonia and severe dyspnea.
  • The LAR is a protective mechanism involving early (LAR1) and late (LAR2) components.

Purpose of the Study:

  • To review the literature on the laryngeal adductor reflex (LAR).
  • To highlight the importance of quantitative assessment of LAR in clinical practice for dysphagia diagnosis.

Main Methods:

  • A systematic literature search was conducted using PubMed and Scopus.
  • Keywords included "laryngeal adductor reflex" and "vocal fold closure".

Main Results:

  • The laryngeal adductor reflex (LAR) involves distinct early and late components (LAR1 and LAR2).
  • Clinical assessment of LAR in dysphagia diagnostics is typically qualitative, triggered by air pulses or tactile stimulation.

Conclusions:

  • Impaired laryngeal adduction, a key component of LAR, increases aspiration risk in patients with dysphagia.
  • Quantitative assessment of LAR is necessary for accurate diagnosis and management.
  • A validated, clinically applicable method for quantitative LAR testing is currently lacking.