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45 Cards in this Set
- Front
- Back
two parts of the oral cavity
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oral vestibule
oral cavity proper |
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slit-like space between the cheeks and teeth
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oral vestibule
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oral vestibule contains:
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-labial frenulae
-pterygomandibular raphe -parotid papilla |
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folds of the mucus membrane between the gingiva and the mucosa of the upper and lower lips
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labial frenulae
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represents a junction area between the buccinator and superior constrictor muscles
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pterygomandibular raphe
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opening of the parotid duct inside the oral vestibule, located opposite the second maxillary molar
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parotid papilla
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boundaries of the oral cavity proper
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lateral - upper and lower dental arches
posterior - opening in the back of the oral cavity roof - hard and soft palates floor - floor of the mouth |
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connecting area between the oral cavity and pharynx
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oropharyngeal isthmus
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lymphoid tissue, bounded by the palatopharyngeal arch and palatoglossal arch
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palatine tonsils
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hard palate is formed by
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-palatine process of the maxilla and the horizontal plates of the palatine bone
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what goes through the incisive foramen
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nasopalatine nerve and sphenoalatine a
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purpose of greater palatine foramen
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passage of greater palatine vessels and nerve to supply the mucosa of the hard palate
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purpose of the lesser palatine foramen
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passage of the lesser palatine vessels and nerve to supply structures of the soft palate
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small glands located in the mucosa of the hard palate
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palatine glands
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transverse folds of the mucus membrane covering the hard palate
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palatine rugae
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levator veli palatini: origin, insertion, action and nerve supply
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-from auditory tube to the palatine aponeurosis
-raises soft palate during swallowing -pharyngeal plexus (CN IX, X, XI) |
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tensor veli palatini: orig, insertion, action, nerve supply
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-from auditory tube to palatine aponeurosis
-tenses soft palate -tendon hooks around the pterygoid hamulus -mandibular divison of CN V |
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palatoglossus: origin, insertion, action, nerve supply
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-from palatine aponeurosis of soft palate to side of tongue
-forms palatoglossal arch -pharyngeal plexus (CN IX, X, XI) |
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palatopharyngeus: origin, insertion, action, nerve supply
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-from the palatine aponeurosis of soft palate to upper part of the wall of the pharynx
-forms the palatopharyngeus arch -pharyngeal plexus (CN IX, X, XI) |
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5 muscles of the soft palate
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-levator veli palatini
-tensor veli palatini -palatoglossus -palatopharyngeus -muscular uvulae |
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fold of the mucus membrane that extends fromt he gingiva to the inferior aspect of the tongue
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lingual frenulum
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located at the base of the lingual frenulum, nipple like structures representing the opening of the ducts of submandibular gland
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sublingual papilla
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one duct from each gland, opens at the sublingual papillae in the floor of the mouth
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submandibular ducts
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raised area on each side of the lingual frenulum formed by the sublingual gland covered by mucus membrane
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sublingual fold
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-smallest and most deeply located of the three salivary glands
-lie in the floor of the oral cavity between the mandible and the genioglossal muscle -each gland has numerous ducts that open in the floor of the mouth |
sublingual gland
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location and function of the tongue
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-partly in the oral cavity proper and part in the oropharynx
-assists in mastication, speech, swallowing, taste and cleaning the oral cavity |
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posterior 1/3 of the tongue
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root of the tongue
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anterior 2/3 of the tongue
-freely movable -anterior pointed part is the apex |
body of the tongue
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inverted v-shaped groove on the dorsum of the tongue
-marks separation b/n anterior and posterior |
sulcus terminalis
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separates the two halves of the tongue, indicates the site of fusion of the two embryonic lingual buds
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median groove (sulcus) and septum
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-small hair-like structures
-cover the entire surface of the tongue -contain afferent nerve endings sensitive to touch |
filiform papillae
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-small mushroom like structures
-scattered among the filiform papillae |
fungiform papillae
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-largest papillae
-anterior to sulcus terminale -surrounded by a trench-like structure that contains numerous taste buds |
vallate (circumvallate) papillae
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small fold of mucosa along the lateral side of the tongue
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foliate papillae
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lymphoid tissue located on the posterior 1/3 of the tongue
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lingual tonsil
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muscles of the tongue that run longitudinally, vertically and transversely, do not have a bony attachment
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intrinsic muscles
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action and innervation of the intrinsic muscles of the tongue
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-change the shape of the tongue
-innervated by CN XII |
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genioglossus innervation and action
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-CN XII
-unilateral contraction pushes tongue to contralateral side -two muscles working together will protrude the tongue |
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paralysis of genioglossus will cause:
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-tongue to shift posteriorly, could lead to suffocaation
-can happen during general anesthesia |
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hyoglossus innervation and action
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CN XII
depresses the tongue |
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styloglossus innervation and action
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CN XII
retrudes tongue |
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palatoglossus innervation and action
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pharyngeal plexus
elevates posterior part of the tongue |
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motor innervation of the tongue
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CN XII and pharyngeal plexus
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sensory innervation of the tongue
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anterior 2/3
-lingual - general sensation -chorda tympani - sensory of taste buds posterior 1/3 -CN IX - general sensation and taste incl. vallate papillae -CN X - area around epiglottis |
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blood supply to the tongue
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lingual a- branch of external carotid a
-veins terminate in the internal jugular v |