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Related Experiment Videos

Functional morphology of phonation evaluated by dynamic MRI.

M Ahmad1, J Dargaud, A Morin

  • 1Laboratoire d'anatomie, UFR de Médecine Lyon Grange- Blanche, Université Lyon I, 8, Avenue Rockefeller, 69373, Lyon Cedex 08, France.

Surgical and Radiologic Anatomy : SRA
|April 22, 2006
PubMed
Summary

Magnetic Resonance Imaging (MRI) effectively visualizes larynx anatomy and dynamic vocal fold function during speech. This technique allows detailed assessment of laryngeal structures and their movements.

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Area of Science:

  • Anatomy
  • Physiology
  • Medical Imaging

Background:

  • The larynx's complex anatomy supports vital airway functions.
  • Understanding laryngeal dynamics is crucial for diagnosing speech and swallowing disorders.

Purpose of the Study:

  • To determine which laryngeal soft tissue structures are definable via MRI.
  • To assess the feasibility of using MRI for evaluating dynamic laryngeal functions.

Main Methods:

  • In vivo MRI scans of the larynx were acquired from six healthy volunteers.
  • Volunteers produced sustained vowels ([i], [a]) and a consonant ([ch]) during deep exhalation.

Main Results:

  • MRI successfully visualized laryngeal anatomy and dynamic changes.

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  • Larynx position varied (high for [i], low for [a]).
  • Vocal fold movement (adduction/abduction) was observed during phonation.

    • Conclusions:

    • Dynamic MRI provides high-resolution, multiplanar imaging of the larynx.
    • MRI is a feasible technique for anatomical assessment and functional analysis of moving laryngeal structures.
    • This method offers insights into vocal fold vibrations during speech production.