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Fisk-Oral cavity
| Question | Answer |
|---|---|
| Dental Arcade | the teeth in either the maxillary or mandibular dentition. |
| Deciduous Teeth Dental formula | 2 Incisors, 1 canine, 2 molars. |
| Adult Teeth Dental formula | 2 Incisors, 1 canine, 2 premolars, 3 molars |
| Oral Vestibule | Area between the teeth and the cheek. |
| Oral Cavity (proper) | Everything else between both Oral Vestibules |
| What muscles make up the soft palate (roof of the oral cavity) | 1.Tensor veli palatini. 2.Levator veli Palatini. 3.Muculus uvulae |
| 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 |
| 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 |
| 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. |
| 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 |
| What muscle is responsible for raising the soft palate? | Levator veli palatini (CN X). Also raises the uvula. |
| 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. |
| What is the Pterygomandibular Raphe? | It is the connection point between the Superior Constrictor M and the R and L Buccinator Mucles. |
| What Nerve innervtes the oral cavity walls? | CN X |
| What muscle makes up the floor of the oral cavity? | Mylohyoid. (CN V3, N. to mylohyoid) |
| Intrensic Muscles of the tongue | Longitudinal, vertical, and horizontal fibers. All innervated by the Hypoglossal N (CN XII) |
| 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) |
| 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. |
| 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 |
| What are tonsils? | Intraepithelial collection of lymphocytes located at the entry into the pharynx. Important in filtering lymph and destroying foreign pathogens |
| Location of Pharyngeal (adnoid) tonsil | posterior to the nasal cavity, in the roof of the nasopharynx |
| Location of Tubal Tonsils | at the opening of each Eustachian tube into the pharynx. |
| Location of palatine tonsils | Found on the R and L sides of the oropharyx. |
| Location of Lingual tonisls | They are located on the dorsal surface at the base of the tongue. |
| Submandibular gland | secretes mucin rich saliva through a single duct into the base of the frenulum. **Innervated by the ANS via Submandibular ganglia. |
| Sublingual gland | secretes 5% of saliva through multiple ducts along the frenulum. **Innervated by ANS via Submandibular ganglia |
| 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 |
| 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 |
| Sinus Drainage into the Middle Meatus | Frontal sinus, anterior ethmoid sinus, maxillary sinus. |
| Sinus Drainage into the Superior Meatus | Posterior ethmoid sinus |
| Sinus Drainage into the Inferior Meatus | Nasoacrimal duct. |
| Sinus Drainage into the spheno-ethmoidal recess | Sphenoid sinus. |
| What 4 arteries supply the nose | Kiesselbach's plexus: 1.Sphenopalatine A. 2.Superior labial A. 3.Greater Palaine A. 4.Anterior Ethmoid A. |
| Muscles of the Infratemporal Fossa | **The muscles of mastication. 1.Temporalis. 2.Masseter. 3.Medial Pterygoid. 4.Lateral Pterygoid. |
| Nerves of the infratemporal Fossa | Mandibular N (CN V3)branches here: Inferior Alveolar, Lingual, Buccal, Auriculotemporal, N. to mylohyoid. |
| 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) |
Created by:
WeeG
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