Exam 1 Review Flashcards
What is the only muscle of the tongue not innervated by hypoglossus n?
palatoglossus
I: Vagus n
What is the solitary nucleus?
purely sensory nucleus in brainstem
input from: 7, 9, and 10
Taste: chorda tympani, CN 9, and Vagus N
Sensory info from tympanic plexus
Chemoreceptors and Mechanoreceptors from carotid body
Other visceral sensory stuff from vagus and glossopharyngeal Ns
If a patient lesions a hypoglossal N unilaterally, what will they look like symptomatically?
Tongue will deviate toward the side of damage when trying to stick out their tongue
What cranial N brings Presynaptic fibers to the ciliary ganglion?
CN III
What ganglia does the Facial N (CN 7) bring presynaptic PS fibers to?
pterygopalatine
submandibular
What CN supplies Presynaptic PS fibers to the otic ganglion?
CN 9
What types of fibers are in the lesser petrosal N?
What do they do?
CN 9 –> Presynaptic PS in lesser petrosal N –> to otic ganglion = synapse –> auriculotemporal N –> parotid gland
What is the origin and path of the great petrosal N?
branches from Facial N carrying presyn PS –> meets w/ deep petrosal to form n of vidial (pterygoid) canal –> synapses at pterygopalatine ganglion –> postsyn fibers follow branches of V2 –> lacrimal gland and other glands in nasal cavity and palate
What is the origin and path of the chorda tympani?
Branch of Facial N carrying taste and presynaptic PS fibers –> synapses at submandibular ganglion –> taste to anterior 2/3 of tongue; PS to submandibular and sublingual glands
Besides the optic nerve, what goes through the optic canal?
opthalamic artery
What cranial N passes through the foramen magnum?
spinal accessory (11)
What is the neural control of saliva secretion?
Parotid: PS from CN 9 (glossopharyngeal)
Submandibular and Sublingual: PS from Facial N
Sym: from cervical ganglia –> mucous secretion
How much saliva do the parotid glands produce?
Where do they open
25-50%
open into oral vestibule next to second upper molar
How much saliva do the submandibular glands produce?
Where are they located?
60-70%
bottom of mouth on either side of ligual frenulum
How much saliva do the sublingual glands produce?
Where do they open?
3-5%
multiple tiny sublingual ducts –> inferior surface of mouth
What type of secretion do each salivary gland produce?
parotid: only serous
submandibular: mucous and serous
sublingual: mainly mucous
What are dental alveoli?
sockets within alveolar processes of both maxilla and mandible
What forms a gomphosis joint/
roots
dental alveoli
peridontal ligament
Where is cementum?
just outside dentin on the tooth
(from inner to outer: pulp–> dentin–> cementum –>PDL)
What is the pattern of teeth on one side?
2 1 2 3
2 incisors
1 canine
2 prepolars
3 molars
What innervates levator veli palatini and stylopharyngeus ms?
pharyngeal branch of vagus n
What n innervates salpingopharyngeus and palatopharyngeus?
CN X
What 2 structures can you see superficial to the submandibular gland?
glossopharyngeal N
tonsillar branch of facial a
What 3 muscles rais the palate when you swallow?
tensor Veli Palatine (V3)
Levator Veli palatini (X)
Salpingopharyngeus (X)
