SLHS 261 1st Edition Lecture 13Outline of Last Lecture I. Velopharyngeal functionOutline of Current Lecture II. Surprise Slide A. Punch in cheekbone, just below the eye, tripod fracturei. Zygomatic arch, lateral wall of maxillary sinus (floor of the orbit), orbital rim/floor, sometimes-sphenoid boneii. Punch to the cheek bone can result in vision problems because the zygomatic arch protects the eyesiii. treated by metal fill III. The MandibleA. Close-up Mandible is the only moveable bone in the craniofacial skeletonB. The mandible is the hardest bone, 200 lb of force exerted to bring teeth together to chew III. TrismusA. “Lock jaw”- Spasm of the muscles of masticationB.Temporomandibular Joint connects the lower jaw to the bone on the side of the head (temporal) C. Can move downward and upward, forward and backward, side to side. In general, movementsmay be a complex combination of these basic motions D. TMJ disorder: Problems with the jaw joint, muscles and face, including chewing. Symptoms include jaw pain, stuck or locked jaw, headaches, toothaches, neck aches. Causes include teeth grinding, stress, arthritis, whiplash, among others. Affects women more than men. IV. Muscles of the PharynxA. Stylopharyngeus: Pulls the pharyngeal tube upward and draws the lateral wall of the pharynx toward the side (widens the tube) V. Seven muscles of the mandibleA. Masseter: Origin- zygomatic arch; insertion: angle and ramus of mandible; function: elevates mandible B. Pterygoid Plate (internal): Function: Elevate mandible and protrude mandibleC. Pterygoid (External): Function: Depresses mandible, protrude mandible, These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.move mandible laterally. D. Digrastric and Mylohyoid: Function: Contraction pulls upward on hyoid bone or downward on mandible and depresses (lowers) jaw/opens mouthE. Geniohyoid: Function: Lowers the
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