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PNS > Exam 1: Trigeminal > Flashcards

Exam 1: Trigeminal Flashcards

1
Q

Largest CN

A

Trigeminal

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2
Q

Trigeminal carries more ___ than ___

A

Sensory fibers

Motor fibers

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3
Q

Nickname of CN5

A

Great sensory neuron of face

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4
Q

3 nuclei of termination

A
  1. Main sensory nucleus
  2. Spinal nucleus
  3. Trigeminal mesencephalic nucleus
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5
Q

Nucleus of origin

A

Trigeminal motor nucleus

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6
Q

Peripheral ganglion

A

Trigeminal (semilunar) ganglion

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7
Q

3 peripheral branches

A

Ophthalmic
Maxillary
Mandibular

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8
Q

Sensory info that goes to main trigeminal nucleus

A

Touch
Vibration
Joint proprioception

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9
Q

Sensory info that goes to spinal nucleus

A

Pain

Temperature

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10
Q

Sensory pathway to main and spinal nuclei: cell bodies in

A

Trigeminal ganglion

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11
Q

Only CNS nucleus to contain cell bodies of primary sensory neurons

A

Mesencephalic nucleus

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12
Q

Only branch to carry motor fibers

A

Mandibular

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13
Q

Motor nucleus receives info from

A
  1. Cerebral cortex
  2. Red nucleus
  3. Reticular formation
  4. Tectum
  5. MLF
  6. Mesencephalic nucleus
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14
Q

Apparent origin

A

Lateral aspect of pons

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15
Q

Trigeminal ganglion located

A

Trigeminal cave (pouch of dura)

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16
Q

Ophthalmic division carries senses from

Surface of head

A
  1. Skin over forehead
  2. Skin over nose
  3. Skin over scalp
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17
Q

Ophthalmic division carries senses from

Inside body

A
  1. Mucous membrane in frontal sinus
  2. Mucous membrane in sphenoid sinus
  3. Membrane covering nasal septum
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18
Q

4 branches of ophthalmic division

A
  1. Meningeal
  2. Lacrimal
  3. Frontal
  4. Nasociliary
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19
Q

Meningeal nerve supplies

A

Dura mater lining middle cranial fossa

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20
Q

____ given off before ophthalmic division leaves SOF

A

Meningeal branch

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21
Q

Smallest of main branches of ophthalmic

A

Lacrimal

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22
Q

Lacrimal nerve passes through ____ and reaches ____

A

Lacrimal gland

Skin of upper eyelid

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23
Q

Lacrimal nerve also carries _____ fibers to lacrimal gland

A

Para Symp. Fibers

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24
Q

Parasympathetic fibers traveling with lacrimal gland originated in ____ and reach lacrimal nerve via ____

A

Pterygopalatine ganglion (CN 7)

Zygomatic nerve (V2)

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25
Q

Largest major branch of ophthalmic

A

Frontal

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26
Q

2 branches of frontal nerve of ophthalmic

A

Supratrochlear

Supraorbital

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27
Q

Supratrochlear N conveys sense from

A

Medial corner of eye

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28
Q

Supraorbital N carries senses from

A

Conjunctiva
Upper eyelid
Forehead
Mucous membrane lining frontal sinus

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29
Q

3 branches and 2 terminal branches of nasociliary N of ophthalmic

A
  1. Communicating branch to ciliary ganglion
  2. Long ciliary N
  3. Posterior ethmoid N
  4. Anterior ethmoid N
  5. Infratrochlear N
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30
Q

Branch of ophthalmic with most branches

A

Nasociliary (5 branches)

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31
Q

Long ciliary N supplies

A

Eyeball

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32
Q

Posterior ethmoid N carries sense from

A

Sphenoidal and ethmoidal sinuses

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33
Q

Anterior ethmoid N branches

A

External nasal N

Internal Nasal N

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34
Q

External nasal N supplies

A

Skin over nose

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35
Q

Internal nasal nerve supplies

A

Mucous membrane covering anterior part of nasal septum

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36
Q

Infratrochlear N supplies

A

Medial corner of eye (include lacrimal sac)

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37
Q

Ophthalmic division carries only ____ info

A

Sensory

38
Q

Maxillary division carries only

A

Sensory info

39
Q

Maxillary division enters ____ through foramen rotundum

A

Pterygopalatine fossa

40
Q

Maxillary division carries info from

External face

A
  1. Skin between eyes and mouth

2. Skin over cheeks and temples

41
Q

Maxillary division senses

Inside

A
  1. Mucosa lining maxillary sinuses
  2. Nasal conchae
  3. Palate
  4. Gingiva
42
Q

4 branches of maxillary division

A
  1. Middle meningeal N
  2. Zygomatic N
  3. Ganglionic branches
  4. Infraorbital N
43
Q

____ (of maxillary division) given off before exiting foramen rotundum

A

Middle meningeal nerve

44
Q

Middle meningeal N supplies

A

Meninges of middle cranial fossa

45
Q

Zygomatic nerve of maxillary division gives off communicating branch carrying ______ from ______ to the lacrimal gland

A

Postganglionic parasympathetic fibers

Pterygopalatine ganglion

46
Q

Zygomatic nerve of maxillary division gives rise to 3 branches

A

Communicating branch

Zygomaticotemporal N

Zygomaticofacial N

47
Q

Zygomaticotemporal N supplies

A

Skin over temple

48
Q

Zygomaticofacial N supplies

A

Skin over cheek

49
Q

Zygomatic nerve enters orbit via

A

IOF

50
Q

2 or 3 ganglionic branches carry info from _____

A

Upper pharynx
Nasal cavity
Palate

51
Q

Ganglionic branches carry info through ____ to maxillary division

A

Pterygopalatine ganglion

52
Q

Infraorbital N supplies

A

Lower eyelid
Skin over upper jaw
Maxillary sinus

53
Q

Before entering infraorbital canal, infraorbital nerve gives off

A

Posterior, middle, and anterior Superior alveolar nerves

54
Q

Infraorbital N travels through

A

Infraorbital fissure and infraorbital canal

55
Q

____ found just above alveoli

A

Superior dental plexus

56
Q

Posterior superior alveolar nerve supplies

A

Molars

57
Q

Middle superior alveolar nerve supplies

A

Premolars

58
Q

Anterior Superior alveolar Nerve supplies

A

Incisors

59
Q

Preganglionic parasympathetic fibers reach pterygopalatine ganglion from facial nerve via

A

Greater petrosal nerve

60
Q

Postganglionic sympathetic fibers from ____ pass through pterygopalatine ganglion

A

Superior cervical ganglion

61
Q

____ pass through pterygopalatine ganglion

A

Sensory fibers

62
Q

Mandibular division exit cranial vault via _____ as large sensory root and ____

A

Foramen ovale

Small motor root

63
Q

Large sensory root and small motor root of mandibular division combine in

A

Intratemporal fossa

64
Q

Mandibular division is

A

Mixed

65
Q

Mandibular division carries motor Innervation to what 8 muscles

A
  1. Masseter
  2. Temporalis
  3. Medial pterygoid
  4. Lateral pterygoid
  5. Tensor veli palatini
  6. Tensor tympani
  7. Mylohyoid
  8. Ant belly of digastric
66
Q

Mandibular division also carries sensation from

A

Skin over mandible, post cheek, post temple

Mucosa of lower oral cavity and cheeks

67
Q

2 branches given off in infratemporal fossa

A
  1. Recurrent meningeal branch (Nervous spinosum)

2. Medial pterygoid nerve

68
Q

Nervus spinosum reenters cranium via ____ and carries sensory info from

A

Foramen spinosum

Dura of middle cranial fossa, anterior cranial fossa, calvarium

69
Q

Motor supply for medial pterygoid muscle

A

Medial pterygoid nerve

70
Q

Medial pterygoid nerve also gives rise to fibers that pass through otic ganglion and supply

A

Tensor veli palatine

Tensor tympani

71
Q

Overall, medial pterygoid motor to ___ muscles

A

3

Medial pterygoid, tensor veli palatine, tensor tympani

72
Q

After the 2 branches are given off in the infratemporal fossa, mandibular nerve divides into

A

Mostly motor anterior division

Mostly sensory posterior division

73
Q

Anterior division of mandibular gives rise to

A
  1. Masseter N
  2. Deep temporal N
  3. Lateral pterygoid N
  4. Buccal N
74
Q

Masseter nerve
Motor to ___
Sensory to ___

A

Masseter

Info from TMJ

75
Q

Deep temporal N gives rise to ____ and ____, both of which supply ____

A

Anterior and posterior branch

Temporalis muscle

76
Q

Lateral pterygoid N supplies

A

Lateral pterygoid

77
Q

Buccal N supplies

A

Sensation from cheek (skin and mucosal surfaces) and buccal gingiva of molars

78
Q

Major sensory branch of anterior division of mandibular division

A

Buccal N

79
Q

Posterior division of mandibular N gives rise to

A
  1. Auriculotemporal N
  2. Lingual N
  3. Inferior alveolar N
80
Q

____ division is larger than the ___ division (mandibular division)

A

Posterior

Anterior

81
Q

Auriculotemporal N passes through ____, Posterior to TMJ and into ___

A

Parotid gland

Infratemporal fossa

82
Q

Auriculotemporal N carries sensory info from

A

Skin of temple and ear

83
Q

Auriculotemporal N also carries post ganglionic parasympathetic fibers from ___

A

Otic ganglion

84
Q

Lingual N conveys sensory info from

A

Mucosa of oral cavity

85
Q

Lingual N combines with ____ in infratemporal fossa

A

Chorda tympani (branch of CN 7)

86
Q

Inferior alveolar N carries sensory info from

A

Lower teeth and chin

87
Q

2 branches of inferior alveolar N

A

Incisive branch

Mental N

88
Q

Incisive branch supplies

A

Incisors
Canines
1st premolar
Adjacent gingiva

89
Q

Mental N supplies

A

Labial gingiva adjacent to incisors and skin of lower lip of chin

90
Q

Motor fibers carried in inferior alveolar N supply

A

Mylohyoid

Ant belly of digastric

PNS (24 decks)

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