The Larynx and Phonation

Flashcards about the larynx and phonation.

Aryepiglottic muscle

Constricts the laryngeal opening, protecting the airways.

Thyroepiglottis muscle

Dilates the laryngeal opening, opens the airways.

Cricothyroid Muscle

Lower border of thyroid to cricoid arch; supplied by the external laryngeal nerve.

Thyroarytenoid Muscles

Attached to the base of the muscular process of arytenoid cartilage and inner surface of thyroid in midline.

Thyromuscularis

Lengthen and adducts

Thyrovocalis

Tenses in conjunction with the cricothyroid contracting

Posterior Cricoarytenoid

Attached to posterior aspect of muscular process; only abductor of vocal ligaments.

Lateral Cricoarytenoid

Attached to anterior aspect of the muscular process; adductor of vocal ligaments.

Transverse Arytenoid

Attached between posterior aspect of arytenoid cartilages; only unpaired muscle; adductor of vocal ligaments.

Oblique Arytenoid

Attached obliquely between posterior aspect of arytenoid cartilages; adductor of vocal ligaments.

All nerves supplying the larynx

Branches of the vagus nerve (CN X).

Nervus laryngeus inferior

Inferior laryngeal nerve.

Nervus vagus

Vagus nerve.

Nervus laryngeus superior

Superior laryngeal nerve.

Nervus laryngeus recurrens

Recurrent laryngeal nerve.

What is the origin, insertion, innervation, and action of the Aryepiglottic muscle

What is the origin, insertion, innervation, and action of the Thyroepiglottis muscle

What innervates the cricothyroid muscle

Supplied by external laryngeal nerve, ONLY ONE!

What is the thyroartenoid muscle attached too?

Attached to the base of muscular process of arytenoid cartilage and inner surface of thyroid in midline
• Thyromuscularis
• Thyrovocalis

What is the post cricoarytenoid attached too?

Attached to posterior aspect of muscular process

What is the Lateral Cricoarytenoid attached too?

Attached to anterior aspect of the muscular process

Where does the Transverse Arytenoid attach?

Attached between posterior

Where does the Oblique Arytenoid attach?

Attached obliquely between

Look at the nerve supply

What is the revus laryngeaus superior and superior laryngeal nerve?

The recurrent laryngeal nerve is a branch of the vagus nerve that innervates most of the laryngeal muscles, while the superior laryngeal nerve divides into the internal and external branches, supplying sensation and motor function respectively to the larynx.

What is the nervus laryngeus recurrens and recurrent laryngeal nerve

A branch of the vagus nerve responsible for innervating most laryngeal muscles, crucial for phonation.

Laryngoscopic View of Larynx

What is this a view of?

Larynx

Look at the vocal ligament positions and try and describe what they’re doing at each stage.

The vocal ligaments adjust their tension and position during phonation, impacting pitch and sound production as they open and close.

Look at this diagram and try and label

What happens when vocal cords open and close?