Related Experiment Videos
[Contemporary postural and segmental modification of forced voice]
M N Grini1, M Ouaknine, A Giovanni
1CHU La Timone, Laboratoires d'Audio-Phonologie Clinique, Marseille, France.
Revue De Laryngologie - Otologie - Rhinologie
|December 29, 1998
Summary
Objective measurements can identify forced voice patterns. This study found significant differences in center of gravity displacement speed between healthy individuals and those with laryngeal dysfunction, aiding diagnosis.
Area of Science:
- Laryngology
- Biomechanics
- Speech Pathology
Context:
- Forced voice involves increased peri-laryngeal tension and characteristic head/neck posture.
- This can lead to vocal cord dysfunction (dysphonia) and may necessitate surgical intervention.
- Current management relies on subjective assessments of postural features.
Purpose:
- To develop and validate a system for objective, non-invasive measurement of postural features associated with the forced voice.
- To improve patient management by providing quantifiable data on laryngeal dysfunction.
- To differentiate between individuals with and without vocal problems based on postural metrics.
Summary:
- A prospective study compared a control group with a patient group experiencing laryngeal dysfunction.
- Simultaneous measurements of postural and segmental activity were taken using accelerometers, cine-analysis, and a postural platform.
- Analysis focused on the resting phase post-phonation, identifying center of gravity displacement speed as a key differentiator.
Impact:
- Center of gravity displacement speed significantly discriminated between control and patient groups (p < 0.001).
- Mean displacement speed was 0.07 for controls versus 0.32 for patients.
- This reliable measurement can be integrated into clinical assessments for forced voice and laryngeal dysfunction.