SLHS 261 1st Edition Lecture 14Outline of Last Lecture I. Mandible, muscles of the pharynx, muscles of the mandible Outline of Current Lecture II. Surprise SlideA. While you sleep, your tongue is hard at work forcing saliva down your throat. Everyone has a unique tongue print. III. Buccal Cavity and Mucous LiningA. Buccal cavity is the space between the gums and the teeth and the lips and the cheek. B. Mucosal Lining- Internal surfaces of the pharyngeal oral cavities: consists of the epithelium and the lamina propriaIV. Intrinsic Muscles of the tongue: fine and delicate movements of the tongueA. Superior Longitudinal: courses back to front and fans out laterally across the tongueB. Inferior Longitudinal: Moves the tip of the tongue downward and shortens the tongueC. Transverse: Narrows and the tongue D. Vertical: Flatten and broaden the tongue. Transverse and vertical work together to protrude the tongue V. Extrinsic Muscles of the tongue: styloglossus, palatoglossus, hyoglossus, genioglossus- change tongue placement in oral cavityA. Stylogossus: Retracts tongue (pulls backward) – originates at the styloid processB. Palatoglossus: Elevates the posterior part of the tongueC. Hyoglossus: Depresses tongue, retracts tongue D. Genioglossus: Protrudes and depresses the tongue VI. Classification of Muscles: A. Sphincter: circular fibers that provides constriction of a part of passageway and relaxes to allow passagei. Orbicularis orisB. Transverse: run horizontally from origin and insert into lipsi. Buccinator: deepest muscle of the face, compress lips and cheeks against teeth and draws mouth corner laterallyThese 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.ii. Risorious: small muscle located in check- pulls corner of mouth backward and toward the sideC. Angular: approach corners of mouth obliquely above or belowi. Zygomatic major: draws mouth angle superiorly and laterallyii. Zygomatic minor : elevates upper lip and pulls corner of mouth upwardiii. Levator labii superioris: elevates upper lip and outward turningiv. Levator labii superioris: evelates upper lip and dilates nostrilv. aleque nasi (see above)vi. Depressor labii inferioris: pulls lower lip downward and may turn lip outward D. Vertical: up and downi. Mentalis: upward displacement of soft tissue of chin, forces lower lip against alveolar process of mandibleii. Levator anguli oris: pulls corner of mouth upward, can also elevate lower lip against upper lip to assist forcing lips togetheriii. Depressor anguli orisE. Cervical: Originates from cervical vertebraei. Platysma: pulls the skin of the neck toward the mandible: also pulls the lower lip downwardF. Summary: A. Divisions of the tongue: Tip, blade, dorsum, root, bodyIntrinsic muscles: superior longitudinal, inferior longitudinal, transverse, verticalB. Extrinsic muscles: Styloglossus, palatoglossus, hyoglossus, genioglossus C. Classification of lip muscles: Sphincter, transverse, angular, cervical,