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test 2
the mouth
| Question | Answer |
|---|---|
| the oral cavity opens onto the face through the? | oral fissure(line that seperates the lips |
| what divides the oral cavity into two regions? | the dental arches |
| what are the two regions inside the oral cavity? | ORAL VESTIBULE-between cheeks & lips and dental arches ORAL CAVITY PROPER-enclosed by the dental arches |
| what forms the roof of the oral cavity? | the hard and soft palate |
| what forms the floor of the oral cavity? | the mylohyoid mm. and geniohyoid m. of tongue |
| the lateral walls of the oral cavity are formed mainly by which muscle? | the buccinator m. |
| what are the contributing bones of the skeletal framework of the oral cavity? | maxillae-sphenoid-temporal bones-mandible-hyoid bone-palatines |
| the superior part of the mandible that holds the teeth is known as the? | alveolar part of the mandible |
| relatively, the adult dentition has how many teeth? be specific | 32 total: 8 incisors-4 canines 8 premolars- 12 molars |
| the cheeks are formed primarily by which muscle? and is this muscle one of facial expression? | buccinator. yes it is one of the muscles of facial expression |
| nerve innervation for the buccinator m.? | buccal branch of the facial nerve(SVE-motor) |
| sensation of the skin & oral mucosa of cheeks is carried by which nerve? be specific | buccal branch of the mandibular n. (V3) |
| the muscles of the floor of the oral cavity function, in order to? | depress(open)mandible when hyoid is fixed and elevate/pull hyoid forward when mandible is fixed |
| nerve innervation to mylohyoid? | nerve to mylohyoid (inf. alveolar branch of V3 |
| nerve innervation to geniohyoid? | a branch of C1 |
| where are the submandibular and sublingual glands located? | floor of the oral cavity |
| what is the root of the tongue attached to? | to the mandible and hyoid bone |
| what part of the tongue constitutes the oral part of the tongue and the pharyngeal part? | oral part-anterior 2/3pharyngeal part-posterior 1/3 |
| what strucute seperates the oral and pharyngeal part of the tongue? | the terminal sulcus |
| what covers the tongue to increase it's surface area and has taste buds? | papillae of the tongue |
| which muscles of the tongue perform the following actions? | protrude-retract-depress-elevate |
| what are the 4 extrinsic muscles of the tongue? | palatoglossus-styloglossus-hyoglossus-genioglossus |
| which extrinsic tongue muscle makes up the bulk of the tongue? | genioglossus |
| where do the genioglossus muscles originate from? | mental spines of the hyoid body |
| nerve innnervation for the genioglossus mm.? | hypoglossal nerve |
| where are the hyoglossus muscles in relation to the genioglossus muscles? | hyoglossus mm. are immediatly lateral to genioglossus mm. |
| where do the hyoglossus mm originate from? | greater horn of the hyoid |
| nerve innervation for the hyoglossus mm? | hypoglossal nn.(CNXII) |
| where do the styloglossus mm. originate? | styloid process |
| function and nerve innervation of the styloglossus mm? | retract the tongue and innervated by (CNXII) |
| what are the 5 nerves that innervate the tongue? specify motor and sensort? | SENSORY-mandibular(V3), facial, glossopharyngealMOTOR-hypoglossal, vagus |
| what seperates the oral cavity from the nasal cavity? | hard palate |
| what structure acts as a valve that can be depressed to close the oropharyngeal isthmus? | soft palate |
| nerve innervation for the palate? | greater and lesser palatine and nasopalatine(V2) |
| blood supply to the palate comes from? | greater palatine a.lesser palatine a.ascending palatine a. |
| what are the five muscles that contribute to the formation of the soft palate? | tensor veli palatinilevator veli palatinipalatoglossuspalatopharyngeusmusculus uvulae |
| which muscles descend into the palate | they both descend into the oral cavity from the skull |
| which muscles ascend into the palate? | palatoglossus and palatopharyngeus |
| where does the tensor veli palatini descend from and hook into in the palate? | descends from the sphenoid-hooks around the pterygoid hamulus-and than expands to form the palatine aponeurosis |
| what is the role of the tensor veli palatini during yawning and swallowing? | T.V.P. tenses the soft palate and opens the pharyngotympanic tube |
| where does the levator veli palatini descend from and end up at? | descends from the temporal bone-attaches to palatine aponeurosis |
| what is the role of the levator veli palatini? | elevates the soft palate by raising the aponeurosis |
| where does the palatopharyngeus arise from? | superior surface of the palatine aponeurosis and descends to attach to the pharyngeal wall |
| which nerve innervates both the palatopharyngeus and the levator veli palatini? | vagus nerve-pharyngeal branch |
| where does the palatoglossus extend to? | from the inferior surface of the palatine aponeurosis to the lateral surface of the tongue |
| nerve innervation for the palatoglossus? | vagus-pharyngeal branch |
| where does the musculus uvulae run from? | from posterior nasal spine to the uvula. on top of the palatine aponeurosis |
| nerve innervation for the musculus uvulae? | vagus-pharyngeal branch |
| where are the palatine tonsils located? | lateral wall of the oropharynx |
| what are the three muscles that surround the pharynx and act as constrictors? | superior-middle-inferior constrictor mm. |
| how do the constrictor muscles move a bolus of food to the esophagus? | by sequential contraction from top to bottom |
| nerve innervation for all 3 constrictor muscles? | vagus-pharyngeal branch |
| what is stage 1 of swallowing? | muscles of the tongue and palate push bolus to oropharynx(a voluntary action) |
| what is stage 2 of swallowing? | soft palate elevates and seals off the nasopharynx from the oropharynx. oropharynx is opened wider and shorter(involuntary) |
| what is stage 3 of swallowing? | sequential contraction of constrictor muscles to force bolus into esophagus. |
Created by:
chadlarson
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