Muscles that Move the Head

Muscles that Move the Head - Muscles that Move the Head,...

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Muscles that Move the Head, Neck, and Hyoid I. Hyoid Muscles - hyoid muscles innervated by cervical spinal nerves except Mylohyoid (mandibular branch of Trigeminal nerve CN V3), Stylohyoid ( Facial nerve CN VII), Digastric (anterior belly = mandibular branch of Trigeminal nerve CN V3 and posterior belly = facial nerve CN VII), and Geniohyoid (Hypoglossal nerve CN XII) Muscle Origin Insertion Function Geniohyoid Mandible hyoid Elevates the hyoid Mylohyoid Mandible Fibrous connection along midline of mouth floor AND hyoid Elevates the hyoid, forms the floor of the mouth Stylohyoid Styloid process Hyoid (greater horn) Elevates the hyoid (during swallowing) Digastric (anterior and posterior bellies) Mandible and mastoid process (See previous handout for details) hyoid Depresses mandible, elevates the hyoid (during swallowing and the opening and closing of the mouth) Omohyoid (superior and inferior bellies) Hyoid (superior) Superior border of scapula (inferior) Intermediate tendon at the junction of two bellies
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Muscles that Move the Head - Muscles that Move the Head,...

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