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Oral cavity (Functions (Communication b/w digestive, respiratory tracts,…
Oral cavity
Functions
Communication b/w digestive, respiratory tracts
Sensory perception of food-lingual papillae, tongue
Initiation of digestive process by mastication, lubrication, enzymatic breakdown of food by amylase in saliva
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Source-filter theory: Sound source (glottal, supra glottal)--> Vocal tract filter--> Speech sounds
Structures
Buccal cavity
Between teeth, lips, cheeks
Anterior, lateral to oral cavity proper
When mandible depressed, buccal cavity affects oral resonance
Oral cavity proper
bordered by teeth, tongue, hard, soft palate, palatoglossal arches
Roof of mouth
Hard palate anteriorly: palatine bones, palatine process of maxilla
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Floor of mouth
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Intrinsic, extrinsic muscles
Under tongue-geniohyoid, mylohyoid
Act to elevate hyoid bone, depress mandible
Oropharyngeal isthmus
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Borders oral cavity, pharynx, nasal cavities
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Palatopharyngeal, palatoglossal folds/arches form boundary of fauces. Paloglossal arch<-->Pharyngeal tonsil <--> palatopharyngeal folds
Disorders
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Frenulum connected
Labial
Connects inner surfaces of superior, inferior lips w alveolar region
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Epithelium
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Rich in salivary gland tissue, skeletal muscle fibres (nuclei around periphery)
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