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Trigeminal N Flashcards

(58 cards)

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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

Study These Flashcards
A

Internal Carotid Plexus

25
______ gives proprioceptive input to Ophthalamic N
Oculomotor, Trochlear and Abducens N's
26
Before the ophthalmic nerve enters the orbit, it gives off the ______ nerve
Tentorial (Recurrent Meningeal) N.
27
N. that adheres to the trochlear nerve to the tentorium cerebelli
Tentorial (Recurrent Meningeal) N.
28
Just before entering the orbit through the superior orbital fissure, it divides into three branches:
1) Lacrimal N. 2) Frontal N. 3) Nasociliary N.
29
smallest branch of ophthalamic n.
Lacrimal N.
30
Lacrimal N. enters orbit via
Superior Orbital Fissure
31
Lacrimal N. receives a branch from
Zygomaticotemporal branch of the Zygomatic N. of the Maxillary N.
32
Zygomaticotemporal branch of the Zygomatic N. of the Maxillary N. ? kind of N.?
parasympathetic efferent (secretomotor fibers)
33
Lacrimal N. innervates...
1) Lacrimal gland | 2) Lateral side of conjunctiva
34
largest branch of Ophthalamic N
Frontal N
35
Frontal N enters orbit via...
Superior Orbital Fissure above the Levator Palpebrae Superioris and runs forward
36
About midway in the orbit, Frontal N divides into...
1) Supratrochlear N. (smaller) | 2) Supraorbital N. (larger)
37
N that runs medially forward in orbit and passes above trochlea of Superior Oblique
Supratrochlear N.
38
Supratrochlear N runs...
medially forward in orbit and passes above trochlea of Superior Oblique
39
Supratrochlear N gives off a descending branch to...
Infratrochlear N of Nasociliary N
40
Supratrochlear N emerges...
through Frontal Notch (Frontal bone)
41
Supratrochlear N innervates...
1) medial side of conjunctiva and | 2) skin of upper eyelid
42
Supraorbital N. emerges...
on the forehead via supraorbital notch/foramen (of Frontal bone)
43
Supraorbital N ascends and divides into...
small medial and large lateral branches
44
Supraorbital N innervates...
1) skin of scalp up to lambdoid suture | 2) frontal sinus mucosa
45
Intermediate sized and inferior branch of Ophthalamic N.
Nasociliary N
46
Nasociliary N enters orbit via...
1) medial part of superior orbital fissure and | 2) common tendinous ring
47
Structures that pass through common tendinous ring
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
Nasociliary N gives off branch
Anterior Ethmoidal branch
49
Anterior Ethmoidal Branch of Nasociliary N enters cranial cavity via...
Anterior Ethmoidal Foramen and canal (Ethmoidal bone)
50
once in cranial cavity, Anterior Ethmoidal branch of Nasociliary N runs...
forward on the upper surface of the cribriform plate
51
Anterior Ethmoidal N of Nasociliary N of Ophthalamic N of Trigeminal N gives off a branch to the anterior cranial fossa called...
the Anterior Meningeal N
52
after giving off a branch to the anterior cranial fossa, the Anterior Ethmoidal N...
descends through a slit in the crista galli into the Nasal cavity
53
Anterior Ethmoidal N supplies the...
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
the Medial Internal Nasal Branch of the Anterior Ethmoidal N supplies...
the front part of the nasal septum
55
the Lateral Internal Nasal Branch of the Anterior Ethmoidal N supplies...
the anterior part of the lateral wall of nasal cavity
56
Where does the Anterior Etmoidal N become the External Nasal N
at the lower border of the nasal bone
57
External Nasal N supplies...
1) skin of the ala 2) skin of apex 3) skin of nasal vestibule
58
trace the External Nasal N back to its nucleus of origin
External Nasal N <-Trigeminal N

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