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Electrophysiological predictors of hyperfunctional dysphonia.

Agata Szkiełkowska¹, Paulina Krasnodębska¹, Andrzej Mitas²

¹Audiology and Phoniatrics Clinic, Institute of Physiology and Pathology of Hearing, Warsaw, Poland.

Acta Oto-Laryngologica

|January 3, 2023

Summary

Subclinical functional voice disorders may indicate future vocal hyperfunction. Measuring autonomic nervous system (ANS) indicators and laryngeal muscle tone can identify at-risk individuals for early intervention.

Keywords:

Dysphonia blood volume pulse signal electrophysiology heart rate variability voice

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Area of Science:

Vocal health
Autonomic nervous system
Laryngeal function

Background:

The autonomic nervous system (ANS) plays a crucial role in the pathomechanism of functional voice disorders.
Understanding the interplay between ANS and vocal tract muscles is vital for diagnosing and treating voice conditions.

Purpose of the Study:

To investigate the relationship between ANS electrophysiological indicators and external laryngeal muscle tone.
To determine if combined measurements can predict the risk of primary functional voice disorder.

Main Methods:

Study included 81 participants, including 27 professional opera singers, all without voice complaints.
Methods involved ENT and phoniatric examinations, superficial electromyography (SEMG), and recording of physiological indicators (heart rate, skin resistance).

Main Results:

Laryngeal hyperfunction was observed in 26 individuals, correlating with increased external laryngeal muscle tone during phonation.
These findings were associated with changes in electrophysiological indicators such as heart rate variability (HRV), blood volume pulse (BVP), and electrodermal activity (EDA).

Conclusions:

Anomalies in electrophysiological parameters may signal individuals at risk for developing hyperfunctional dysphonia.
Early detection through these indicators allows for potential remedial actions before symptomatic voice disorders manifest.