SUPERFICIAL ORIGIN INSERTION ACTION NERVE MUSCULATURE OF THE NECK Omohyoid Superior belly Clavicle and rib Hyoid bone Depresses hyoid bone Ansa cervicalis Inferior belly Superior margin of scapula Clavicle and 1st rib Thyrohyoid Thyroid cartilage of the larynx Hyoid bone Depresses hyoid bone, elevates Ansa cervicalis thyroid cartilage Sternohyoid Posterior surface of manubrium, and Hyoid bone Depresses hyoid bone Ansa cervicalis medial clavicle Stylohyoid Styloid process Hyoid bone Moves hyoid bone up and back Facial VII Mylohyoid Inferior margin of mandible bone Elevates hyoid bone and floor of Trigeminal V mouth, depresses mandible Digastric Anterior: Lower border of mandible Hyoid bone Elevates hyoid bone and base of Ant: Trigeminal V near midline tongue, depresses mandible - Anterior belly Post: Facial VII Posterior: Mastoid process of temporal -Posterior bone
SUPERFICIAL MUSCULATURE OF THE NECK ORIGIN INSERTION ACTION NERVE Omohyoid Superior belly Inferior belly Clavicle and rib Superior margin of scapula Hyoid bone Clavicle and 1st rib Depresses hyoid bone Ansa cervicalis Thyrohyoid Thyroid cartilage of the larynx Hyoid bone Depresses hyoid bone, elevates thyroid cartilage Ansa cervicalis Sternohyoid Posterior surface of manubrium, and medial clavicle Hyoid bone Depresses hyoid bone Ansa cervicalis Stylohyoid Styloid process Hyoid bone Moves hyoid bone up and back Facial VII Mylohyoid Inferior margin of mandible bone Elevates hyoid bone and floor of mouth, depresses mandible Trigeminal V Digastric - Anterior belly -Posterior Anterior: Lower border of mandible near midline Posterior: Mastoid process of temporal bone Hyoid bone Elevates hyoid bone and base of tongue, depresses mandible Ant: Trigeminal V Post: Facial VII