Fisk-Oral cavity
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| Dental Arcade | the teeth in either the maxillary or mandibular dentition.
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| Deciduous Teeth Dental formula | 2 Incisors, 1 canine, 2 molars.
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| Adult Teeth Dental formula | 2 Incisors, 1 canine, 2 premolars, 3 molars
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| Oral Vestibule | Area between the teeth and the cheek.
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| Oral Cavity (proper) | Everything else between both Oral Vestibules
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| What muscles make up the soft palate (roof of the oral cavity) | 1.Tensor veli palatini.
2.Levator veli Palatini.
3.Muculus uvulae
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| Innervation of the Soft palate? | Sensory: CN V2 via Superior Alveolar branches to the teeth, and Palatine brances to the anterior 3/4 of the soft palate.
Motor: CN X innervates lev. veli palatini and musculus uvulae.
**CN V3 innervates tensor veli palatini
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| How can you test CN X through the oral cavity? | Look at the uvula, if it hangs abnomrally to one side, indicates problem with CN X
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| What is the purpose of the uvula? | It seals off the posterior middle of the soft palate where the tensor and levator veli palatini act on. It seals it off so they dont pull it apart.
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| What is the main action of the tensor veli palatini in the soft palate? | It pulls on the Eustachian tube when it tenses the soft palate, allowing them to open during yawing and swallowing. Active in "popping" your ears
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| What muscle is responsible for raising the soft palate? | Levator veli palatini (CN X). Also raises the uvula.
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| What 3 muscles make up the walls of the oral cavity? | 1.Superior constrictor M. (U shaped muscle that opens torwards the mouth).
2.Buccinator M.
3.Orbicularis Oris M.
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| What is the Pterygomandibular Raphe? | It is the connection point between the Superior Constrictor M and the R and L Buccinator Mucles.
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| What Nerve innervtes the oral cavity walls? | CN X
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| What muscle makes up the floor of the oral cavity? | Mylohyoid. (CN V3, N. to mylohyoid)
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| Intrensic Muscles of the tongue | Longitudinal, vertical, and horizontal fibers. All innervated by the Hypoglossal N (CN XII)
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| Extrensic Muscles of the tongue | 1.Styloglossus (from styloid process).
2.palatoglossus (from soft palate).
3.hyoglossus (from hyoid).
4.genioglossus (from chin).
**All innv. by CN XII except Palatoglossus (CN X)
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| What muscles is being tested when Dr. has Pt. protrude tounge during oral exam? | Genioglossus. If the tongue deviates to one side there is a problem with CN XII on that side.
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| Sensory innervation of the tongue | Anterior 2/3: GSA from Lingual N (V3), taste from CN VII (Chondra Tympani).
Posterior 1/3: CN IX does GSA and taste
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| What are tonsils? | Intraepithelial collection of lymphocytes located at the entry into the pharynx. Important in filtering lymph and destroying foreign pathogens
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| Location of Pharyngeal (adnoid) tonsil | posterior to the nasal cavity, in the roof of the nasopharynx
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| Location of Tubal Tonsils | at the opening of each Eustachian tube into the pharynx.
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| Location of palatine tonsils | Found on the R and L sides of the oropharyx.
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| Location of Lingual tonisls | They are located on the dorsal surface at the base of the tongue.
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| Submandibular gland | secretes mucin rich saliva through a single duct into the base of the frenulum.
**Innervated by the ANS via Submandibular ganglia.
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| Sublingual gland | secretes 5% of saliva through multiple ducts along the frenulum.
**Innervated by ANS via Submandibular ganglia
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| Parotid gland | Watery saliva for lubrication (helps break down food) that empties into oral cavity at the base of 2nd upper molar after traversing the masseter muscls and puncturing the buccinator.
**Inntervted by ANS via Otic ganglia
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| Function of Concha (turbinates) | All 3 serve to warm air as it passes through the nasal cavity via heavey blood supply.
**Meatus is the area deep to a concha
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| Sinus Drainage into the Middle Meatus | Frontal sinus, anterior ethmoid sinus, maxillary sinus.
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| Sinus Drainage into the Superior Meatus | Posterior ethmoid sinus
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| Sinus Drainage into the Inferior Meatus | Nasoacrimal duct.
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| Sinus Drainage into the spheno-ethmoidal recess | Sphenoid sinus.
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| What 4 arteries supply the nose | Kiesselbach's plexus:
1.Sphenopalatine A.
2.Superior labial A.
3.Greater Palaine A.
4.Anterior Ethmoid A.
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| Muscles of the Infratemporal Fossa | **The muscles of mastication.
1.Temporalis.
2.Masseter.
3.Medial Pterygoid.
4.Lateral Pterygoid.
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| Nerves of the infratemporal Fossa | Mandibular N (CN V3)branches here:
Inferior Alveolar, Lingual, Buccal, Auriculotemporal, N. to mylohyoid.
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| Arteries of the infratemporal Fossa | Maxillary A branches here:
Middle meningeal, Inferior alveolar, Branches to the muscles of mastication, and the sphenopalatine (within the pterygopalatine fossa, enters the nose)
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