Aula 3 - Voz 1 - Músculos intrínsecos da laringe - Parte 2

Summary

This video script explores the intrinsic muscles of the larynx, with a focus on their roles in swallowing and voice production. Key muscles like the aryepiglottic and thyroepiglottic muscles are discussed in relation to their impact on epiglottis movement during swallowing, without affecting voice. Clinical cases are presented, addressing issues like difficulty singing high notes and a weak voice due to glottic gaps. Solutions include strengthening or relaxing specific muscles such as the cricothyroid and arytenoid muscles. The video also introduces exercises to improve vocal performance, with a follow-up video offering solutions and guidance.

Takeaways

• 😀 The **Ari-Epiglotic Muscle** helps in the swallowing process by lowering the epiglottis, preventing food from entering the lungs, but does not affect voice production.
• 😀 The **Tireo-Epiglotic Muscle** helps return the epiglottis to its original position after swallowing, allowing the airway to open for normal respiration, without impacting voice production.
• 😀 Both the **Ari-Epiglotic** and **Tireo-Epiglotic** muscles play essential roles in the mechanics of swallowing rather than in vocalization.
• 😀 The **cricothyroid muscle** (CT) is crucial for singing high-pitched notes and should be strengthened for people having difficulty with high tones.
• 😀 For patients who struggle with low-pitched voices, the **tireo-arytenoid muscle** may be overactive and should be relaxed to improve their vocal range.
• 😀 A clinical case example describes a male patient struggling with high-pitched notes, where strengthening the **cricothyroid muscle** and relaxing the **tireo-arytenoid muscle** is recommended.
• 😀 In another clinical case, a female patient with a weak voice and a posterior glottic gap requires strengthening of the **arytenoid muscle** to close the gap and improve voice strength.
• 😀 The posterior glottic gap in women and children is common and is often addressed by strengthening the **arytenoid muscle**, particularly its transverse and oblique fibers.
• 😀 A table is provided for tracking various laryngeal muscles, including their origin, insertion, function, and their impact on voice production (e.g., whether they help in producing low or high-pitched sounds).
• 😀 Exercises to strengthen and relax laryngeal muscles are included, along with a video lesson that will provide a detailed answer key for better understanding.

Q & A

What is the function of the aryepiglottic muscle?

The primary function of the aryepiglottic muscle is related to swallowing. It helps lower the epiglottis to cover the opening of the larynx and prevent food from entering the lungs. It does not directly affect voice production.

Where does the aryepiglottic muscle originate and insert?

The aryepiglottic muscle originates from the apex of the arytenoid cartilage and inserts into the epiglottic cartilage on both sides.

How does the aryepiglottic muscle contribute to the swallowing process?

During swallowing, the aryepiglottic muscle contracts and pulls the epiglottis down, covering the laryngeal opening to prevent food or liquid from entering the lungs.

What is the function of the thyroepiglottic muscle?

The thyroepiglottic muscle helps return the epiglottis to its original position after swallowing, ensuring the airway is open for normal breathing once swallowing is completed.

Where does the thyroepiglottic muscle originate and insert?

The thyroepiglottic muscle originates from the thyroid cartilage and inserts into the epiglottic cartilage.

What is the role of the thyroepiglottic muscle in the respiratory process?

The thyroepiglottic muscle aids in restoring the epiglottis to its original position after swallowing, allowing for the free passage of air in and out of the lungs.

What does the term 'glottic chink' refer to in the context of the clinical cases?

A glottic chink refers to a posterior opening in the glottis that can cause issues with voice production. This condition is often seen in women and children.

In the case of a patient with difficulty singing high notes, which muscle should be targeted for strengthening?

The patient with difficulty singing high notes likely needs to strengthen the cricothyroid (CT) muscle, which is the antagonist of the thyroarytenoid (TA) muscle. This muscle helps raise the pitch of the voice.

Which muscle should be strengthened if a patient has a weak voice and a glottic chink?

The patient should strengthen the arytenoid muscle, specifically the transverse and oblique fibers, which help close the posterior region of the glottis and improve vocal closure.

What is the impact of the cricothyroid muscle on voice production?

The cricothyroid muscle is involved in adjusting the pitch of the voice. When contracted, it increases the tension of the vocal cords, producing a higher-pitched sound. This muscle is crucial for singing high notes.