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AS II Module 4 > Lecture 4: trigeminal nerver (CN5) > Flashcards

Lecture 4: trigeminal nerver (CN5) Flashcards

1
Q

resident fibers of CN 5

A
  • general somatic afferent (GSA): general sensation from the face
  • special visceral efferent (SVE): muscles of the 1st pharyngeal arch
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2
Q

acquired fibers of CN 5

A
  • special afferent (SA): taste

- general visceral efferent (GVE): parasympathetic fibers to smooth muscle

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3
Q

CN 5 path

A

courses anteriorly to reach the middle cranial fossa

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4
Q

location of the trigeminal ganglion

A

-trigeminal impression/ trigeminal cave/ meckel’s cave

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5
Q

V1 exits the cranial cavity via the

A

superior orbital fissure

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6
Q

V2 exits the cranial cavity via the

A

foramen rotundum

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7
Q

V3 exits the cranial cavity via the

A

foramen ovale

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8
Q

V1

A

ophthalmic nerve

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9
Q

branches off V1

A
  • meningeal branch
  • lacrimal nerve
  • frontal nerve
  • nasociliary nerve
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10
Q

meningeal branch (v1)

A

is a sensory branch that emerges from v1 before it transverses the superior orbital fissure

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11
Q

before traversing the superior orbital fissure the ophthalmic nerve (v1)

A

branches into the lacrimal, frontal, and nasociliary nerves

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12
Q

lacrimal nerve (v1)

A

travels along the lateral border of the orbit to reach the lacrimal gland and the lateral eye

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13
Q

frontal nerve (v1)

A

branches into the supratrochlear and supraorbital nerves

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14
Q

supratrochlear and supraorbital nerves

A

course anteriorly though the orbit and emerge superior to the eye with same named arteries

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15
Q

nasocilliary nerve

A

travels in a plane deep to the lacrimal and frontal nerves

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16
Q

nasocilliary nerve branches

A
  • sensory root –> ciliary ganglion –> short ciliary nerves
  • long ciliary nerves
  • posterior ehtmoidal nerve
  • anterior ethemoidal nerve
  • infratrocheal nerve
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17
Q

posterior ethmoidal nerve

A

exits the orbit via the posterior ethmoidal foramen

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18
Q

anterior ethmoidal nerve

A
  • exits the orbit via the anterior ethmoidal foramen

- gives rise to internal and external nasal branches

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19
Q

v1 branches that carry sensory information from the face

A
  • supraorbital
  • supratrochlear
  • infratrochlear
  • external nasal
  • lacrimal
20
Q

v2

A

maxillary nerve

21
Q

branches off v2

A
  • meningeal branch
  • zygomatic nerve
  • communicating branches with pterygopalatine ganglion
  • posterior superior alveolar nerve
  • infraorbital nerve
22
Q

meningeal branch (v2)

A

branch before v2 courses through the foramen rotundum to enter the pterygopalatine fossa

23
Q

branches of v2 in the pterygopalatine fossa

A
  • zygomatic nerve
  • communicating roots to pterygopalatine ganglion
  • posterior superior alveolar nerve
  • infraorbital nerve
24
Q

zygomatic nerve (v2)

A
  • enters the orbit via the inferior orbital fissure

- branches into the zygomaticofacial and zygomatictemporal nerves

25
Q

zygomaticofacial and zygomatictemporal nerves

A

leave the orbit and emerge on the face via same named foramen
-communicating branch from the zygomaticotemporal nerve to the lacrimal nerve (v1)

26
Q

communicating roots to pterygopalatine ganglion

A

the ppterygopalatine ganglion is suspended from v2 by 2 communicating branches
-fibers pass through the pterygopalatine ganglion without interruption and into branches

27
Q

communicating roots to pterygopalatine ganglion branches

A
  • orbital branches
  • medial posterior superior nasal nerve
  • lateral posterior superior nasal nerve
  • nasopalatine nerve
  • greater palatine nerve
  • lesser palatine nerve
  • pharyngeal nerve
28
Q

orbital branches travel in

A

the inferior orbital fissure to reach the orbit

29
Q

-medial posterior superior nasal nerve, lateral posterior superior nasal nerve, and nasopalatine nerves travel in

A

the sphenopalatine foramen to enter the nasal cavity

30
Q

pharyngeal nerve travels in

A

the palatovaginal canal to reach the nasopharynx

31
Q

greater palatine and lesser palatine travel in

A

descend in the greater palatine canal to reach the palate

32
Q

posterior superior alveolar nerve (v2)

A

leave the pterygopalatine fossa through the pterygomaxillary fissure and enters the maxilla via the alveolar foramen

33
Q

infraorbital nerve (v2)

A

continuation of the maxillary nerve

  • name change occurs as it passes through the inferior orbital fissure
  • courses in the infraorbital canal before exiting in the infraorbital foramen
34
Q

infraorbital nerve (v2) gives rise to

A
  • middle superior alveolar nerve

- anterior superior alveolar nerve

35
Q

infraorbital nerve (v2) terminates as

A
  • palpebral branch
  • nasal branch
  • labial branch
36
Q

superior dental plexus

A

formed by nerves that carry sensory information to from maxillary teeth and adjacent gingival tissue

  • posterior superior alveolar nerve
  • middle superior alveolar nerve
  • anterior superior alveolar nerve
37
Q

dental pulp is innervated by

A
  • a delta and c fibers from CN 5 (GSA) and postganglionic sympathetic nerve fibers from the superficial cervical ganglion
38
Q

v2 branches that carry sensory information from the face

A
  • zygomaticotemporal
  • zygomaticofacial
  • infraorbital
39
Q

v3

A

mandibular nerve

40
Q

immediate branches off v3

A
  • meningeal branch (nervus spinosus)

- nerve to the medial pterygoid

41
Q

branches off v3 anterior division

A
  • nerve to the lateral pterygoid
  • deep temporal nerves (anterior and posterior)
  • massenteric nerve
  • long buccal nerve
42
Q

branches off v3 posterior division

A
  • auriculotemporal nerve
  • lingual nerve
  • inferior alveolar nerve
43
Q

nervus spinosus v3

A

re-enters the cranial cavity via the foramen spinosum and caries GSA from the meninges of the anterior and middle cranial fossa

44
Q

nerve to the medial pterygoid (v3)

A 
carries motor (SVE) and proprioceptive (GSA) fibers to the medial pterygoid muscle 
-also sends a small branch to the tensor tympani and tensor veli palatini muscle
45
Q

lingual erve (v3)

A
  • receives chorda tympani (CN 7)

- has communicating fibers with the submandibular ganglion

46
Q

inferior alveolar nerve (v3)

A
  • nerve to the mylohyoid

- terminates as the mental nerve and incisive nerve

47
Q

v3 branches that carry sensory information from the face

A
  • auriculotemporal
  • mental
  • buccal

AS II Module 4 (4 decks)

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