Muscles of facial expression – attach to skin (figure 10.3a)Orbicularis oculi – surrounds eyeAction – close eyeOrbicularis oris – surrounds mouthMouth “purse” lips. PULL THAT STRING! (pucker your lips)Levator (raise) labii (lip) superioris (above/upper lip)Action – elevates upper lipDepressor labii inferiorisAction – depresses lower lip. Pulls it downMentalis – elevates and protrudes lower lipZygomaticus major/ minorPull upper lip up and to the side.Major – elevates corner of mouthMinor – elevates upper lipDepressor anguliorisPulls down/ depresses on the corner of the lipsBuccinatorFlattens cheeks onto teeth. Helps with eating foodFrontalisWrinkles the forhead and raises the eyebrowsFigure 10.6 muscles of chewingExternal to mandibleTemporalisOrigin – on top of the templeInserts- coronoid process mandibleHelps chew. Elevates mandibleMasseterOrigin – zygomatic archInsert. – ramus of mandibleElevates mandibleInternal to mandibleMedial pterygoidOrigin - sphenoidInsert- medial ramus of mandibleAction- elevate jaw and move lateralLateral pterygoidOrigin - sphenoidInsert – neck mandibleAction – protrude mandible and move sideways (important for chewing)Hyoid boneLocationAttachmentsGreater hornLesser hornBodyLarynx and Pharynx (figure 24.6) (anterior view)Location – front of throat. Air passage to breath. Where voice is produced.Passages- parts of larynxthyroid cartilage ( big blue sheet on figure) (no back)cricoid cart. (below thyroid) (wraps all the way around)Arytenoid cart. (inside and behind thyroid) (stretches or relaxes vocal cord) (stretch really tight, high pitch)(relaxed – deep voice)This cartilage pivots, operates vocal cordsTracheaEpiglottis (epoglottic cart.) (looks like heart)Blocks food or drink from going down air passageFolds downFigure 10.9SuprahyoidMylohyoidOrigin - mandibleInsert – body of hyoidAction- elevate hyoid and floor of mouthDigastricStylohyoidInfrahyoidCoronoid process 03/26/2014Muscles of facial expression – attach to skin (figure 10.3a)-Orbicularis oculi – surrounds eye oAction – close eye-Orbicularis oris – surrounds mouthoMouth “purse” lips. PULL THAT STRING! (pucker your lips)-Levator (raise) labii (lip) superioris (above/upper lip)oAction – elevates upper lip-Depressor labii inferiorisoAction – depresses lower lip. Pulls it down-Mentalis – elevates and protrudes lower lip-Zygomaticus major/ minoroPull upper lip up and to the side.oMajor – elevates corner of mouthoMinor – elevates upper lip-Depressor anguliorisoPulls down/ depresses on the corner of the lips-BuccinatoroFlattens cheeks onto teeth. Helps with eating food-Frontalis oWrinkles the forhead and raises the eyebrows Figure 10.6 muscles of chewingExternal to mandible-TemporalisoOrigin – on top of the templeoInserts- coronoid process mandible oHelps chew. Elevates mandible -Masseter oOrigin – zygomatic archoInsert. – ramus of mandibleoElevates mandibleInternal to mandible -Medial pterygoidoOrigin - sphenoidoInsert- medial ramus of mandibleoAction- elevate jaw and move lateral-Lateral pterygoidoOrigin - sphenoidoInsert – neck mandibleoAction – protrude mandible and move sideways (important for chewing) Hyoid bone -Location-Attachments-Greater horn-Lesser horn-BodyLarynx and Pharynx (figure 24.6) (anterior view)-Location – front of throat. Air passage to breath. Where voice is produced. -Passages- parts of larynx-thyroid cartilage ( big blue sheet on figure) (no back)-cricoid cart. (below thyroid) (wraps all the way around)-Arytenoid cart. (inside and behind thyroid) (stretches or relaxes vocal cord) (stretch really tight, high pitch)(relaxed – deep voice)oThis cartilage pivots, operates vocal cordsTrachea-Epiglottis (epoglottic cart.) (looks like heart)oBlocks food or drink from going down air passageoFolds downFigure 10.9 Suprahyoid-MylohyoidoOrigin - mandibleoInsert – body of hyoidoAction- elevate hyoid and floor of mouth-Digastric-Stylohyoid