Lecture 12- Nasal and Oral Cavities Flashcards
What structure separates the anterior cranial fossa above the nasal cavity?
Cribiform plate of the ethmoid bone
What is just lateral to the upper half of the nasal cavity? lower half?
upper- ethmoid air sinus
lower- maxillary air sinus
What structure separates the nasal cavity from the oral cavity below?
hard palate (palatine process of the maxilla and horizontal plates of the palatine bone)
What are the 3 components of the nasal septum?
- Septal cartilage
- Perpendicular (vertical) plate of the ethmoid bone
- Vomer
What bone provides the superior and middle concha? inferior concha?
Superior and middle concha are part of the ethmoid bone
Inferior concha is its own bone
What are the four passages of the nasal cavity created by the superior, middle and inferior nasal concha (turbinates)?
- Sphenoethmoidal reces
- Superior meatus
- Middle meatus
- Inferior meatus
Where does the sphenoid sinus drain?
into the sphenoethmoidal recess
What drains into the hiatus semilunaris? Where is it located?
- found in middle meatus
- drains anterior ethmoidal sinus, frontal and maxillary sinuses
Where do the maxillary sinuses drain?
into the hiatus semilunaris
Where is the bulla ethmoidalis? What does it drain?
- swelling on the superior border of the hiatus semilunaris
- drains middle ethmoidal sinuses
Where does the nasolacrimal duct drain?
into the inferior meatus of the nasal cavity
Name 5 arterial branches that supply to nasal cavity.
- Anterior and posterior ethmoidal arteries
- lateral nasal branches of the facial artery
- greater palatine artery
- sphenopalatine artery
What 4 bones house paranasal sinuses?
Frontal
Ethmoid
Sphenoid
Maxilla
Where do the frontal sinuses drain?
semilunar hiatus (hiatus semilunaris) in the middle nasal meatus
How do the anterior ethmoidal cells drain into the middle nasal meatus?
via the frontonasal duct
How do the middle ethmoidal cells drain into the middle meatus?
through the ethmoidal bulla on the superior border of the semilunar hiatus
How do the posterior ethmoidal cells drain?
directly into the superior meatus
How do the sphenoid sinuses drain?
into the sphenoethmoidal recess
What does the roof of the maxillary sinus form?
floor of the orbit
What does the medial wall of the maxillary sinus form?
lateral wall of the nasal cavity
What does the floor of the maxillary sinus form?
the alveolar part of the maxilla of the oral cavity
Where do the maxillary sinuses drain?
into the maxillary ostium then into the middle nasal meatus through the semilunar hiatus
What complication can occur during removal of palatal teeth?
displacement of root fragment into the maxillary sinus
What is the name for the space between the teeth and the mucosal lining of the lips and cheeks?
vestibule
What are the two attachments of the buccinator muscle?
pterygomandibular raphe and alveolar processes of the maxilla and mandible
Where does the parotid duct open in the oral cavity?
opposite the crown of the 2nd molar
What are the 2 bones that form the hard palate?
- horizontal plate of the palatine bone
2. palatine process of the maxilla
What are the 3 pairs of foramina that open on the hard palate?
Greater palatine foramen
Lesser palatine foramen
Incisive Canal (fossa)
Names the 5 muscles of the soft palate.
- Levator veli palatini
- Tensor veli palatini
- Palatoglossus
- Palatopharyngeus
- Musculus uvulae
Which muscle is responsible for elevating the posterior 1/3 of the tongue?
palatoglossus
What muscle functions to elevate the pharynx and larynx?
palatopharyngeus
Which is more anterior in the oral cavity the palatoglossus or the palatopharyngeus?
palatoglossus
What are the 3 sets of tonsils?
palatine
pharyngeal (single adenoid)
lingual
What is also called the adenoids?
pharyngeal tonsils
What divides the tongue into the anterior 2/3 and the posterior 1/3?
sulcus terminalis
What papillae types contain taste buds?
circumvallate papillae
fungiform papillae
What taste budsc direct food?
filiform papillae
What is the name for the midline fold of mucous membrane that runs on the under surface of the tongue?
lingual frenulum
Where are the sublingual papilla located? What empties there?
located on either side of the lingual frenum
submandibular gland empties there
What 2 muscles retract the tongue?
hyoglossus
styloglossus
What muscle protrudes the tongue?
genioglossus
What two muscles depress the tongue?
genioflossus
hyoglossus
List the 4 intrinsic muscles of the tongue.
- superior longitudinal
- inferior longitiudinal
- transvers
- vertical
What is the main artery of the tongue? Where does it branch from?
the lingual artery, a branch of the external carotid artery
What are the 3 sub-branches of the lingual artery?
dorsal lingual artery
deep lingual artery
sublingual branch
What provides the blood supply to the palatine tonsil?
dorsal lingual artery
What artery supplies the body of the tongue?
deep lingual artery
What artery supplies the floor of the mouth?
sublingual branch
Name the 3 veins that drain the tongue?
deep lingual, sublingual, dorsal lingual
What is the lymphatic drainage of the posterior 1/3 of the tongue?
Jugulo-omyhyoid group
What is the lymph drainage of the tip of the tongue?
submental group
What is the lymph drainage of the side of the tongue?
submandibular group
What is the lymphatic drainage of the central part of the tongue?
jugulo-omohyoid group
What nerve provide generation sensation to the anterior 2/3 of the tongue (GVA)?
CN V
What nerve provides taste fibers to anterior 2/3 of the tongue (SA)?
Chorda tympani via the lingual nerve
Which nerve provide sensation and taste (GVA and SA)) fibers to the posterior 1/3 of the tongue?
CN IX- Glossopharyngeal
What two muscles form the floor of the mouth?
mylohyoid
geniohyoid
What innervates the geniohyoid muscle?
C1
Which duct crosses the lingual nerve in the mouth?
submandibular duct
