What is phonation disorder?

Phonation is defined as the utterance of vocal sounds. Disorders of phonation, therefore, can be caused by a wide variety of abnormalities along the aerodiges- tive tract, including laryngeal pathology, velopharyngeal problems, and even cognitive delays that can inhibit a person from making intelligible vocal sounds.

What is the underlying physiology associated with the voice disorder?

Even with the reduction of the abusive behaviors, the underlying physiology related to the pathology remained unaddressed. Vocal nodules are bilateral mass lesions that increase the mass of the vocal folds and cause the closure of the vocal folds to demonstrate an hourglass closure pattern, thus an air leak.

What are the organs involved in phonation?

Phonation (Structures)

• Hyoid bone.
• Thyroid cartilage.
• Cricoid cartilage.
• Arytenoid cartilages.
• Epiglottis.
• Cuneiform cartilages.
• Corniculate cartilages.

Which organs are involved in phonation and what is their function?

The larynx houses the vocal cords, and manipulates pitch and volume, which is essential for phonation. It is situated just below where the tract of the pharynx splits into the trachea and the esophagus.

What is the anatomy and physiology of phonation?

Anatomy and Physiology of Phonation Phonation is primarily the result of aerodynamic forces acting on the inherently elastic tissue of the vocal folds, setting them into vibration and creating acoustic energy which we call “ voice.

How are voice breakdowns result in voice disorders?

Anatomy and Physiology of Voice Production | Understanding How Voice is Produced | Learning About the Voice Mechanism | How Breakdowns Result in Voice Disorders Voice disorders refer to breakdowns in the vibratory system. Breakdowns can affect any one or all of the three subsystems of voice production.

What is the power source of phonation in speech?

Respiratory drive provides the power source for phonation. Speakers breathe during speech using a combination of diaphragmatic and thoracic muscular activity.

What causes dysphonia in the left vocal fold?

The vocal folds are referred to as the “ vibrator or oscillator “. Small lesions of the vocal folds, such as vocal cysts or nodules (images below) can have drastic effects on voice production. Any lesion that affects vocal fold vibration can cause dysphonia or “hoarseness”. Vocal fold cyst (arrow) of left vocal fold.