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NS-1 > Exam 1 Review > Flashcards

Exam 1 Review Flashcards

1
Q

What is the only muscle of the tongue not innervated by hypoglossus n?

A

palatoglossus

I: Vagus n

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2
Q

What is the solitary nucleus?

A

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

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3
Q

If a patient lesions a hypoglossal N unilaterally, what will they look like symptomatically?

A

Tongue will deviate toward the side of damage when trying to stick out their tongue

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4
Q

What cranial N brings Presynaptic fibers to the ciliary ganglion?

A

CN III

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5
Q

What ganglia does the Facial N (CN 7) bring presynaptic PS fibers to?

A

pterygopalatine

submandibular

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6
Q

What CN supplies Presynaptic PS fibers to the otic ganglion?

A

CN 9

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7
Q

What types of fibers are in the lesser petrosal N?

What do they do?

A

CN 9 –> Presynaptic PS in lesser petrosal N –> to otic ganglion = synapse –> auriculotemporal N –> parotid gland

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8
Q

What is the origin and path of the great petrosal N?

A

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

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9
Q

What is the origin and path of the chorda tympani?

A

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

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10
Q

Besides the optic nerve, what goes through the optic canal?

A

opthalamic artery

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11
Q

What cranial N passes through the foramen magnum?

A

spinal accessory (11)

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12
Q

What is the neural control of saliva secretion?

A

Parotid: PS from CN 9 (glossopharyngeal)

Submandibular and Sublingual: PS from Facial N

Sym: from cervical ganglia –> mucous secretion

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13
Q

How much saliva do the parotid glands produce?

Where do they open

A

25-50%

open into oral vestibule next to second upper molar

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14
Q

How much saliva do the submandibular glands produce?

Where are they located?

A

60-70%

bottom of mouth on either side of ligual frenulum

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15
Q

How much saliva do the sublingual glands produce?

Where do they open?

A

3-5%

multiple tiny sublingual ducts –> inferior surface of mouth

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16
Q

What type of secretion do each salivary gland produce?

A

parotid: only serous
submandibular: mucous and serous
sublingual: mainly mucous

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17
Q

What are dental alveoli?

A

sockets within alveolar processes of both maxilla and mandible

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18
Q

What forms a gomphosis joint/

A

roots

dental alveoli

peridontal ligament

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19
Q

Where is cementum?

A

just outside dentin on the tooth

(from inner to outer: pulp–> dentin–> cementum –>PDL)

20
Q

What is the pattern of teeth on one side?

A

2 1 2 3

2 incisors

1 canine

2 prepolars

3 molars

21
Q

What innervates levator veli palatini and stylopharyngeus ms?

A

pharyngeal branch of vagus n

22
Q

What n innervates salpingopharyngeus and palatopharyngeus?

A

CN X

23
Q

What 2 structures can you see superficial to the submandibular gland?

A

glossopharyngeal N

tonsillar branch of facial a

24
Q

What 3 muscles rais the palate when you swallow?

A

tensor Veli Palatine (V3)

Levator Veli palatini (X)

Salpingopharyngeus (X)

25
Q

What is significant about foramen lacerum?

A

greater petrosal n crosses this space

26
Q

What do the dural venous sinuses mostly contain?

How does CSF get to them?

A

venous blood

CSF goes to sinuses via arachnoid villi/granulations = one way valves

27
Q

What does the pharyngeal branch of the Vagus N innervate?

A

Pharyngeal constrictor ms

salpingopharyngeus m

palatopharyngeus m

28
Q

What does the external laryngeal n innervate?

What is this nerve a branch of?

A

cricothyroid m

branch of vagus n

29
Q

What does the inferior laryngeal/recurrent laryngeal n innervate?

A

Posterior and lateral cricoarytenoid ms

transverse and oblique arytenoid ms

vocalis m

30
Q

What N innervates posterior belly digastric m and stylohyoid m?

A

facial n (CN 7)

31
Q

What n innervates sensory fibers to the cornea and conjuctiva?

A

V1

32
Q

How do you clinically test the oblique eye muscles?

A

adduct eye –> then look up or down

33
Q

What is a Le Forte I fracture?

A

horizontal maxillary fracture, sep teeth from upper face

thru alveolar ridge, lat nose, and inf wall of maxillary sinus

34
Q

What is a Le Forte II fracture?

A

pyramidal fracture over the nose

thru post alveolar ridge, lat walls of maxillary sinuses, inf orbital rim and nasal bones

35
Q

What is a le forte III fracture?

A

craniofacial disjunction

fracture line passes through both orbits and on top of nose

36
Q

what is the greater petrosal n a branch of?

A

Facial N –> then goes to pterygopalatine ganglion and PS fibers join zygomatic branch of V2

37
Q

What layer of the eye is the choroid continuous with?

A

the iris

38
Q

What germ layer gives rise to the parathyroid glands?

A

foregut endoderm

39
Q

What cell type gives rise to the dental sac?

A

head mesenchyme

40
Q

In unilateral cleft lip and palate, what two teeth does the cleft go through?

A

lateral incisor and canine

41
Q

What is the nasal septum derived from?

A

medial nasal prominences

42
Q

What germ tissue turns into the epithelium covering the posterior 1/3 of the tongue?

A

endoderm

43
Q

What innervates the taste buds on the anterior 2/3 of the tongue?

A

facial n

44
Q

What is the hypobranchial eminence derived from?

A

3rd and 4th arches

45
Q

If you damage the TMJ, what muscle can be damaged?

A

lateral pterygoid

inserts on the articular disc and joint capsule of the TMJ

NS-1 (50 decks)

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