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PNS > Trigeminal N > Flashcards

Trigeminal N Flashcards

1
Q

Largest cranial nerve in size

A

Trigeminal

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2
Q

Branchial motor portion of Trigeminal innervates

A

1) the 4 primary mastication muscles
2) the 2 deglutition muscles
3) Tensor Veli Palatini
4) Tensor Tympani

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3
Q

the 4 primary muscles of mastication =

A

1) Temporalis
2) Pterygois internus (Medial Pterygoid)
3) Pterygoid externus (Lateral Pterygoid)
4) Masseter

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4
Q

the 2 deglutition muscles

A

1) Anterior belly of digastric

2) Mylohyoid

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5
Q

Trigeminal apparent origin

A

upper anterolateral border of pons

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6
Q

Trigeminal roots

A
  • sensory root (larger and superior)

- motor root (smaller and inferior)

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7
Q

Motor root of Trigeminal arises from…

A

Motor Nucleus of Trigeminal N (nucleus of origin) in the Upper Pons in the Upper Margin of the Rhomboid Fossa

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8
Q

The sensory fibers consist of the central sensory processes from ______ neurons of the Trigeminal (Gasserian ganglion)

A

pseudo-unipolar

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9
Q

Trigeminal Ganglion =

A

Gasserian Ganglion/Semilunar

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10
Q
  1. The trigeminal ganglion is located in the dura mater fold on the ______ of the petrosal portion of the temporal bone
A

Trigeminal Impression

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11
Q

Trigeminal Impression found ?

A

petrosal portion of the temporal bone

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12
Q

largest sensory ganglion in body =

A

Trigeminal/Gasserian/Semilunar Ganglion

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13
Q

Ganglion that holds the primary sensory neuron of the Trigeminal Nerve

A

Trigeminal/Gasserian/Semilunar Ganglion

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14
Q

The central process (axon) from the trigeminal ganglion synapse with three nuclei of termination:

A

1) Mesencephalic Nucleus (lateral to cerebral aqueduct, anterior to the superior & inferior colloculi)
2) Pontine Nucleus (in mid-pons)
3) Spinal Nucleus (in Medulla Oblongata, continuous w/ Substantia Gelatinosa of Roland in spinal cord)

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15
Q

Mesencephalic Nucleus located…

A

lateral to cerebral aqueduct, anterior to the superior & inferior colloculi

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16
Q

Pontine Nucleus located…

A

in mid-pons

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17
Q

Spinal Nucleus located…

A

in Medulla Oblongata, continuous w/ Substantia Gelatinosa of Roland in spinal cord

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18
Q

The spinal nucleus of the trigeminal nerve is also for the ______ nerves

A

Trigeminal, Facial, Glossopharyngeal and Vegas N’s

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19
Q

The peripheral processes (dendrites) of Trigeminal divide into three divisions:

A

1) Ophthalamic (upper, smallest and purely sensory)
2) Maxillary (intermediate size and position, purely sensory)
3) Mandibular (largest and mixed)

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20
Q

smallest and purely sensory division of Trigeminal

A

Ophthalamic

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21
Q

intermediate size and purely sensory division of Trigeminal

A

Maxillary

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22
Q

largest and mixed division of Trigeminal

A

Mandibular

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23
Q

Ophthalamic Nervepasses forwards through the lateral wall of the cavernous sinus inferior to the ______ nerves

A

oculomotor & trochlear

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24
Q

______ gives sympathetic nerve fibers to Ophthalamic N

A

Internal Carotid Plexus

25
Q

______ gives proprioceptive input to Ophthalamic N

A

Oculomotor, Trochlear and Abducens N’s

26
Q

Before the ophthalmic nerve enters the orbit, it gives off the ______ nerve

A

Tentorial (Recurrent Meningeal) N.

27
Q

N. that adheres to the trochlear nerve to the tentorium cerebelli

A

Tentorial (Recurrent Meningeal) N.

28
Q

Just before entering the orbit through the superior orbital fissure, it divides into three branches:

A

1) Lacrimal N.
2) Frontal N.
3) Nasociliary N.

29
Q

smallest branch of ophthalamic n.

A

Lacrimal N.

30
Q

Lacrimal N. enters orbit via

A

Superior Orbital Fissure

31
Q

Lacrimal N. receives a branch from

A

Zygomaticotemporal branch of the Zygomatic N. of the Maxillary N.

32
Q

Zygomaticotemporal branch of the Zygomatic N. of the Maxillary N. ? kind of N.?

A

parasympathetic efferent (secretomotor fibers)

33
Q

Lacrimal N. innervates…

A

1) Lacrimal gland

2) Lateral side of conjunctiva

34
Q

largest branch of Ophthalamic N

A

Frontal N

35
Q

Frontal N enters orbit via…

A

Superior Orbital Fissure above the Levator Palpebrae Superioris and runs forward

36
Q

About midway in the orbit, Frontal N divides into…

A

1) Supratrochlear N. (smaller)

2) Supraorbital N. (larger)

37
Q

N that runs medially forward in orbit and passes above trochlea of Superior Oblique

A

Supratrochlear N.

38
Q

Supratrochlear N runs…

A

medially forward in orbit and passes above trochlea of Superior Oblique

39
Q

Supratrochlear N gives off a descending branch to…

A

Infratrochlear N of Nasociliary N

40
Q

Supratrochlear N emerges…

A

through Frontal Notch (Frontal bone)

41
Q

Supratrochlear N innervates…

A

1) medial side of conjunctiva and

2) skin of upper eyelid

42
Q

Supraorbital N. emerges…

A

on the forehead via supraorbital notch/foramen (of Frontal bone)

43
Q

Supraorbital N ascends and divides into…

A

small medial and large lateral branches

44
Q

Supraorbital N innervates…

A

1) skin of scalp up to lambdoid suture

2) frontal sinus mucosa

45
Q

Intermediate sized and inferior branch of Ophthalamic N.

A

Nasociliary N

46
Q

Nasociliary N enters orbit via…

A

1) medial part of superior orbital fissure and

2) common tendinous ring

47
Q

Structures that pass through common tendinous ring

A

1) Optic N
2) Ophthalamic A
3) Superior branch of oculomotor N
4) Nasociliary branch of ophthalamic N
5) Abducent N
6) Inferior branch of oculomotor N

48
Q

Nasociliary N gives off branch

A

Anterior Ethmoidal branch

49
Q

Anterior Ethmoidal Branch of Nasociliary N enters cranial cavity via…

A

Anterior Ethmoidal Foramen and canal (Ethmoidal bone)

50
Q

once in cranial cavity, Anterior Ethmoidal branch of Nasociliary N runs…

A

forward on the upper surface of the cribriform plate

51
Q

Anterior Ethmoidal N of Nasociliary N of Ophthalamic N of Trigeminal N gives off a branch to the anterior cranial fossa called…

A

the Anterior Meningeal N

52
Q

after giving off a branch to the anterior cranial fossa, the Anterior Ethmoidal N…

A

descends through a slit in the crista galli into the Nasal cavity

53
Q

Anterior Ethmoidal N supplies the…

A

1) medial internal nasal branch to the front part of the nasal septum
2) lateral internal nasal branch to the anterior part of the lateral wall of nasal cavity

54
Q

the Medial Internal Nasal Branch of the Anterior Ethmoidal N supplies…

A

the front part of the nasal septum

55
Q

the Lateral Internal Nasal Branch of the Anterior Ethmoidal N supplies…

A

the anterior part of the lateral wall of nasal cavity

56
Q

Where does the Anterior Etmoidal N become the External Nasal N

A

at the lower border of the nasal bone

57
Q

External Nasal N supplies…

A

1) skin of the ala
2) skin of apex
3) skin of nasal vestibule

58
Q

trace the External Nasal N back to its nucleus of origin

A

External Nasal N <-Trigeminal N

PNS (1 decks)

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