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Electroglottography in fasting subjects.

Abdul-Latif Hamdan1, Jihad Nassar1, Alexander Dowli2

  • 1Department of Otolaryngology-Head and Neck Surgery, American University of Beirut Medical Center, Beirut, Lebanon.

Journal of Voice : Official Journal of the Voice Foundation
|January 27, 2015
PubMed
Summary
This summary is machine-generated.

Fasting does not significantly alter the closed quotient (CQ) of the sustained vowel /e/. However, vocal effort and fatigue may increase due to dehydration or respiratory muscle strain during fasting.

Keywords:
ElectroglottographyFastingVocal folds

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Area of Science:

  • Speech Science
  • Physiology
  • Otolaryngology

Background:

  • The closed quotient (CQ) is a key parameter in voice analysis, reflecting laryngeal function.
  • Fasting can induce physiological changes, including dehydration and altered muscle function, potentially impacting voice production.

Purpose of the Study:

  • To compare the closed quotient (CQ) of the sustained vowel /e/ in individuals who are fasting versus non-fasting.
  • To investigate the effects of fasting on vocal effort and fatigue.

Main Methods:

  • A cross-sectional study involving 20 adult males.
  • Laryngeal electroglottography was used to measure CQ during sustained /e/ phonation.
  • Vocal effort and fatigue were self-reported on a 0-3 scale.

Main Results:

  • No statistically significant difference was found in the mean CQ between fasting and non-fasting states (P=0.94).
  • A borderline significant increase in phonatory effort was observed during fasting (P=0.059).
  • Vocal fatigue showed a non-significant increase during fasting (P=0.109).

Conclusions:

  • Fasting does not significantly impact the closed quotient (CQ) during sustained vowel phonation.
  • Increased vocal effort and fatigue during fasting may be associated with dehydration or respiratory muscle fatigue.