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41 Cards in this Set
- Front
- Back
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Oral vestibule: bounded externally by
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bounded externally by the lips and cheeks and internally by the lips and gums
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Oral cavity proper: The area between
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alveolar arches and teeth.
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Masseter muscle
Communication btw the oral vestibule and |
and the oral cavity proper (posterior to the 3rd molar aka wisdom teeth)
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Frenulum- in
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the midline of each lip
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Opening of the parotid duct- lateral to
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the second maxillary molar tooth
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Borders of the oral cavity
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Lateral and anterior: the teeth and gums
Superior: hard palate Inferior: the mucosa covering the tongue and sublingual area Posterior: the palatoglossal folds(arch) (right and left) |
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Tongue body lies in
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horizontally in the oral cavity
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Dorsum of the tongue Terminal sulcus: divides
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anterior 2/3 from posterior 2/3
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Lingual tonsil location
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posterior to the terminal sulcus
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Tongue Root:
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posterior 2/3, lies vertical, constitutes the lower part of the anterior boundary of the oropharynx
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between the dorsum of the tongue and the epiglottis
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Median glossoepiglotic
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between the dorsum of the tongue and the lateral border of the epiglottis
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Lateral glossoepiglotic fold
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depression between median and lateral glossoepiglotic folds
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Epiglottic vallecula
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Opending of the submandibular duct
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on the sublingual caruncle
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seen on either side of the sublingual frenulum
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Deep lingual veins
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aT submental triangle
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Mylohoid and geniohyoid
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pulls the hyoid bone anteriorly
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• Geniohyoid muscle
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Geniohyoid is deep to
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o deep to mylohyoid
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Extrinsic muscles of the tongue: alter position of the tongue
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) Genioglossus m.:
Hyoglossus m.: Styloglossu m.: Palatoglossus m |
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Genioglossus m function
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protrusion of the tongue
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Genioglossus m.: innvervation
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hypoglossal nerve (CN XII
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: If one genioglossus doesn’t work the tongue cannot be protruded in the midline. The functional side protrudes normally the nonfunctional side protrudes less or not at all. So when testing for hypoglossal n lesions
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the protruded tongue will deviate towards the side of the lesion.
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Hyoglossus m.:
a. Deep to |
mylohyoid muscle
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Hyoglossus m function
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depresses and retracts the tongue
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Hyoglossus m.: innervation
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hypoglossal nerve (CN XII
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Styloglossu m.: function
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retracts the tongue and draws it superiorly
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Styloglossu m innervation
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hypoglossal nerve
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Palatoglossus m.:
a. Function |
elevates the tongue
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Palatoglossus m.: innervation
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vagus
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Intrinsic muscles of the tongue: alters shape of the tongue
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a. Vertical, transverse, superior longitudinal and inferior longitudinal groups of fibers
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Intrinsic muscles of the tongue innervation
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Hypoglossal nerve
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lies on the mylohyoid muscle
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Sublingual Gland
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Deep part of the submandibular gland: on the
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deep side of mylohyoid muscle
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Passes lateral, inferior and medial to the submandibular duct
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Lingual nerve
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Lingual carries to the anterior 2/3 of the tongue
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GSA
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: near the 3rd mandibular molar tooth, suspended below the lingual nerve.
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Submandibular ganglion
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Submandibular ganglion function
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Parasympathetic preganglionic fibers from CN7(chorda tympani) coming from superior salivary nucleus synapse here to innervate the submandibular and sublingual glands
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passes between the submandibular gland and the hyoglossus muscle. It courses inferior to the lingual nerve
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Hypoglossal nerve
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Lingual artery: Arises from the external carotid artery in the
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carotid triangle
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Anterior 2//3 of the tongue
Sensory Taste Motor |
Lingual n
Chorda tympani (7) Hypoglossal |
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Posterior 1/3 of the tongue
Sensory Taste Motor |
Glossopharyngeal
Glossopharyngeal Hypoglossal |
