Muscles of the Larynx and Their Actions PDF

Here’s a detailed table for **muscles of the larynx and their actions**: | **Category** | **Muscle** | **Action** | **Additional Notes** | |------------------------------|---------------...

Here’s a detailed table for **muscles of the larynx and their actions**: | **Category** | **Muscle** | **Action** | **Additional Notes** | |------------------------------|----------------------------|--------------------------------------------------------|-------------------------------------------------------| | **Intrinsic Muscles** | **Posterior Cricoarytenoid** | Abducts the vocal cords (Opens the glottis) | Only muscle that opens the glottis | | | **Lateral Cricoarytenoid** | Adducts the vocal cords (Closes the glottis) | Helps in phonation | | | **Transverse Arytenoid** | Adducts the arytenoids and closes the posterior glottis | Important for tight closure during swallowing | | | **Oblique Arytenoid** | Narrows the laryngeal inlet (Closes inlet of larynx) | Works with aryepiglotticus to protect airway | | | **Aryepiglotticus** | Closes the laryngeal inlet | Assists in airway protection during swallowing | | | **Thyroepiglotticus** | Opens the laryngeal inlet | Antagonist to aryepiglotticus | | | **Thyroarytenoid** | Relaxes the vocal cords | Modulates vocal tension | | | **Cricothyroid** | Tenses and elongates the vocal cords | Raises the pitch of the voice | | | **Vocalis** | Fine-tunes tension of the vocal cords | Adjusts pitch and quality of voice | | **Extrinsic Muscles** | **Suprahyoid Muscles** | Elevate the larynx | Include digastric, stylohyoid, mylohyoid, geniohyoid | | | **Infrahyoid Muscles** | Depress the larynx | Include sternohyoid, omohyoid, sternothyroid | Let me know if you'd like further elaboration!