cavities of the vocal tract

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cavities of the vocal tract
2013-02-17 18:43:03
cavities involved speech vocals

CSUDH Semester 2 anatomy
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  1. the oral cavity
    • most significant for speech
    • most change during the speech act
    • shape is altered by the movement of the tongue or mandible
    • extends from oral opening anteriorly to the faucial pillars posteriorly
    • lips play a significant role in articulation-point of exit of sound for all orally emitted phonemes (all but the nasals)
  2. regions of the oral cavity
    • hard palate-roof of the mouth
    • rugae-play a role as a landmark for articulation and formation of a bolus
    • median raphe-divides the hard palate into two halves
    • soft palate-velum, separates the oral and nasal cavities (oropharynx and nasopharynx), velum is attached anteriorly to the palatine bone (muscular extention of hard palate)
    • uvula-endo f the soft palate
    • anterior and posterior faucial pillars-bands of tissue on each side of the soft palate which mark the posterior margin of the oral cavity
    • palatine tonsils-located between the anterior and posterior faucial pillars
    • lingual tonsils-medial to the palatine tonsils
  3. oral cavity:
    what makes up the lateral margins of the oral cavity
    • teeth and alveolar ridge of the maxillae
    • tongue occupies most of the lower mouth
  4. buccal cavity
    • lies lateral to the oral cavity
    • the space between the posterior teeth and the cheeks of the face
    • bounded by the cheeks laterally, the lips in front and the teeth medially
    • the posterior margin is the third molar
    • this space plays a role in oral resonance, production of high-pressure consonants and the site of distortion during the production of lateral /s/
  5. pahryngeal cavity
    • pharynx
    • about 12 cm in length
    • is a tube divided into 3 regions
    • extends from the vocal folds up to the region behind the nasal cavity
    • tube lined with muscle that constricts the size of the tube to aid deglutition
    • musculature plays a role in closure of the VP port, opening between oro and nasophar
    • oropharynx 
    • laryngopharynx or hypopharynx 
    • nasopharynx
  6. oropharynx
    in the region of the pharynx immediately posterior to the fauces-superior boundary is the velum and the lower boundary is the hyoid bone
  7. laryngopharynx or hypopharynx
    the hyoid bone marks the upper boundary of the laryngopharynx or hypopharynx which is bounded anteriorly by the epiglottis and inferiorly by the esophagus
  8. nasopharynx
    is the space above the soft palate bounded posteriorly by the pharyngeal portuberance of the occipital bone and the nasal choanae anteriorlythe lateral nasopharyngeal wall contains the orifice of the eustachian tube
  9. nasopharynx:
    the eustachian tube
    • nasop is on a level with the ears
    • the bulge of tissue partially encircling the orifice of the eust tube is the torus tubarius
    • the eust tube provides a means of aerating the middle ear cavity
    • the tensor veli palatini muscle actively open the eust tube
    • the ridge of tissue coursing down fromt eh torus tubarius is the salpingopharyngeal fold (spp)
    • the spp fold is the spp muscle coverd with mucous membrane
    • the pharyngeal tonsils (adenoids) are in the nasop-this lymph tissue may provide support for velopharyngeal closure
  10. what can the removal of too much adenoid tissue result in
  11. nasal cavity
    • produced by the paired maxillae, palatine, and nasal bones divided by the nasal septum
    • septum is made up of the vomer, perpendicular plate of the ethmoid, and the septal cartilage
    • nasal cavities are turbinates and covered with mucous membrane with beating and secreting epithelia and rich blood supply
    • beating epithlia propels pollutants toward the nasop>esophagus to be swallowed
    • NARES or nostrils ar ethe anterior boundaries of the nasal cavities
    • NASAL CHOANAE are the posterior portals connecting the nasop and the nasal cavities
    • the floor of the nasal cavity is the hard palate of the oral cavity (palatine porcesses of the maxillae and horizontal plates of the palatine bones)