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Articulation Lecture 12

This lecture provides an in-depth understanding of the structures in the oral cavity and the mandible, including their functions and connections. It covers topics such as the temporomandibular joint, muscles involved in jaw movement, and speech physiology related to consonants and resonance.

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Articulation Lecture 12

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  1. ArticulationLecture 12

  2. *Know what structures they connect

  3. Oral Cavity • Lips • Teeth • Tongue • Palate • Hard • Soft • Mandible Zemlin, pg 227.

  4. Mandible • Only moveable bone in the face • Connects to the temporal bone via temporomandibular joint (connected via temporomandibular ligament) http://www.mdguidelines.com/temporomandibular-joint-syndrome

  5. Mandible: Lowering Mylohyoid Geniohyoid Digastricus • Digastricus • Connect temporal bone (mastoid process) and mandible • Mylohyoid &Geniohyoid • Connect jaw and hyoid • Contraction: raise hyoid, depress jaw http://en.wikipedia.org/wiki/File:Digastricus.png http://en.wikipedia.org/wiki/File:Mylohyoid_muscle.PNG

  6. Mandible: Lowering Mylohyoid Geniohyoid Digastricus http://en.wikipedia.org/wiki/File:Mylohyoid_muscle.PNG

  7. Mandible: Protrusion • External (Lateral) Pterygoid • Connect pterygoid and jaw • Contraction: protrudes jaw http://www.drjimboyd.com/Masticatory_Musculature04.html

  8. Mandible: Elevation • Masseter • Connects zygomatic arch and jaw • Temporalis • Connects temporal bone and jaw • Also used in jaw retraction • Internal (Medial) Pterygoid • Connects pterygoid and jaw http://www.mdguidelines.com/temporomandibular-joint-syndrome http://doctorspiller.com/Occlusion/pterygoids.htm http://www.drjimboyd.com/Masticatory_Musculature04.html

  9. Speech Physiology

  10. Consonants • B/P • Bring lips together • Lower jaw • Pull lower lip down • T/D • Elevate tongue tip • Lower tongue tip http://www.uiowa.edu/~acadtech/phonetics/#

  11. Consonants • K/G • Raise back of tongue • Lower back of tongue • Th • Move tongue forward • Move tongue back http://www.uiowa.edu/~acadtech/phonetics/#

  12. Resonance • Not only affected by the length of the vocal tract, but also by vocal tract shape • Many vowel sounds in English • Corner vowels: the most extreme differences in tongue placement http://www.ijporlonline.com/article/S0165-5876%2898%2900162-1/abstract

  13. Resonance • F1: pharynx • F2: oral cavity Titze, I.R. (2000). Principles of Voice Production.

  14. Nasal Sounds

  15. Nose • Mostly composed of cartilage • Septum: divides the two halves of the nose internally • Composed of cartilage and bone • Upper third = bone • Lower two-thirds = cartilage http://www.lasinus.com/nasal_anatomy.php http://www.uofmchildrenshospital.org/healthlibrary/Article/89973

  16. Nasal Resonance • When the soft palate is lowered (Tensor veli palatini, Palatoglossus), air enters the nose • Resonance between 300-500 Hz http://educationcing.blogspot.com/2012/08/sound-n-voiced-lingua-alveolar-nasal.html

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