Muscles That Move the Hyoid Bone and Larynx

Action: Depresses mandible; elevates hyoid bone Origin: Anterior belly, mandible near mental protuberance; posterior belly, mastoid process Insertion: Hyoid bone via fascia sling Innervation: Anterior belly = CN V³ (trigeminal nerve, mandibular division) posterior belly = CN VII (Facial nerve)

Action: Elevates hyoid bon Origin: styloid process of temporal bone Insertion: hyoid bone Innervation: CN VII (facial nerve)

Action: elevates hyoid bone; elevates floor of mouth Origin: mylohyoid line of mandible Insertion: Hyoid bone Innervation: CN V³ (trigeminal nerve, mandibular division)

Action: Depresses hyoid bone Origin: manubrium of sternum and medial end of clavicle Insertion: hyoid bone Innervation: cervical spinal nerves C1-C3 through ansa cervicalis (from cervical plexus)

Action: Depresses hyoid bone; fixes hyoid during opening of mouth Origin: superior border of scapula Insertion: hyoid bone Innervation: cervical spinal nerves C1-C3 through ansa cervicalis (from cervical plexus)

Action: Depresses thyroid cartilage of larynx Origin: posterior surface of manubrium of sternum Insertion: thyroid cartilage of larynx Innervation: cercial spinal nerves C1-C3 through ansa cervicalis (from cervical plexus)

Action: Depresses hyoid bone and elevates thyroid cartilage of larynx Origin: thryoid cartilage of larynx Insertion: hyoid bone Innervation: first cervical spinal nerve C1 via CN XII (hypoglossal nerve)