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Important Muscles

Muscles of the Oral Preparation Stage

TermDefinition
Orbicularis Oris Function: keeps mouth sealed Innervation: VII
Mentalis Function: elevates lower lips, scrunches chin Innervation: VII
Buccinator Function: flattens cheeks Innervation: VII
Risorius Function: flattens cheeks Innervation: VII
Masseter Function: elevates mandible Innervation: V
Temporalis Function: elevates mandible; retracts & protrudes mandible Innervation: V
Medial Pterygoid Function: elevates mandible; moves mandible, grinds mandible laterally Innervation: V
Lateral Pterygoid Function: protrudes & grinds mandible Innervation: V
Mylohyoid Function: elevates floor of mouth Innervation: V
Geniohyoid Function: elevates hyoid; depresses mandible Innervation: XII
Diagastric Function: elevates hyoid; depresses mandible Innervation: V, VII
Superior Longitudinal Function: elevates tip; deviates tip Innervation: XII
Inferior Longitudinal Function: depresses tip; deviates tip Innervation: XII
Vertical Function: cups & grooves tongue Innervation: XII
Genioglossus Function: moves tongue body; cups tongue Innervation: XII
Styloglossus Function: elevates posterior tongue Innervation: XII
Palatoglossus Function: elevates posterior tongue; depresses velum Innervation: X, XI
Palatopharyngeus Function: depresses velum Innervation: X, XI
Created by: rianna.aasen
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