Cranial Nerve 5. Flashcards
1
Q
True or False
Trigeminal nerve is the smallest CN
A
False it is the largest
2
Q
Is CN 5 a sensory, motor, or mixed nerve type.
A
Mixed
3
Q
Does CN 5 have more sensory fibers or motor fibers?
A
Sensory
4
Q
What is the nickname for CN 5
A
Great Sensory Nerve of the Face
5
Q
How many nuclues(I) are associated with CN5?
What are they?
A
3
- Main sensory nucleus
- Spinal Nucleus
- Trigeminal mesencephalic nucleus
6
Q
How many nuclues(I) of origin are associated with CN5
A
1
Trigeminal motor nucleus
7
Q
How many peripheral ganglion are associated with C.N. 5?
What is the(ir) name?
A
Trigeminal (semilunar) ganglion
8
Q
What cell bodies are located in the trigeminal ganglion?
A
Primary sensory nureons
9
Q
What are the three branches that given off by the trigeminal nerve?
A
Ophthalmic
Maxillary
Mandibular
10
Q
What nuclei of termination are combined together in the sensory pathway?
A
Main and spinal nuclei
11
Q
Where are the cell bodies located for main and spinal nuclei
A
In trigeminal ganglion
12
Q
Peripheral processes from the main and spinal pathway come from ___________to enter_________
A
The face
Trigeminal ganglion
13
Q
What processes go toward main and spinal nuclei?
A
Central
14
Q
Main trigeminal nuclei gets what type of information sent to it?
A
Touch
Vibration
Joint propioception
15
Q
Spinal nuclei gets what type of sensation sent to it?
A
Pain
Temperature
16
Q
What is the analogous cord pathway for spinal nuclei?
A
Lateral spinothalamic
17
Q
What is the analogous cord pathway for the main nuclei
A
Gracilis
Cuneatous
Anterior spinothalamic
18
Q
What nucleus’ dendrites pass thru the trigeminal ganglion?(does not synapse in there)
A
Mesencephalic nucleus
19
Q
What nucleus has the only primary sensory neurons that have cell bodies located in the CNS? TQ
A
Mesencephalic
20
Q
What is the only branch that carries motor fibers?
A
Mandibular branch
21
Q
Motor nucleus axons are carried in what branch?
A
Mandibular branch
22
Q
The motor nucleus RECEIVES information from what structures?
A
Cerebral cortex (both hemispheres) Reticular formation Red nucleus Tectum Medial longitudinal fascicles Mesencephalic nucleus
23
Q
What type of info does mesencephalic get?
A
Propioceptive info
24
Q
What type of reflex does mesencephalic nucleus have
A
Monosynaptic
25
What is the apparent origin for C.N.5?
Lateral aspect of the pons
26
C.N.5 travels_______ over___________ and enters________, the __________
Anteriorward
The petrous part of the temporal bone
A pouch of dura
Trigeminal cave
27
What is another name for the trigeminal cave?
Meckel’s Cave
28
What is located in the Trigeminal Cave?
Trigeminal ganglion
29
Where do the 3 branches of C.N. 5 arise from?
Trigeminal ganglion
30
Ophthalmic division enters _______________ via ________________
The orbit
| Superior orbital fissure
31
What other C.N. enter the skull like the ophthalmic division?
3
4
6
32
Does the ophthalmic division carry motor or sensory fibers?
Sensory
33
Ophthalmic carries sensation from what?
Skin over
1. Nose
2. Forehead
3. Scalp
Mucous membranes
1. Frontal sinus
2. Sphenoid sinus
Membrane covering nasal septum
34
Ophthalmic division gives rise to how many branches and what are their names?
```
4
Meningeal nerve
Lacrimal nerve
Frontal nerve
Nasociliary nerve
```
35
What is the other name given to the meningeal nerve?
Tentorial branch
36
Where is the meningeal nerve given off from the ophthalmic division?
Before it leaves the superior orbital fissure
37
What does the meningeal never supply?
Dura mater lining the middle cranial fossa
38
True or false
| Lacrimal nerve is the biggest branch the ophthalmic division gives off.
False
39
What is the pathway of the lacrimal nerve?
Travels along superior aspect of lateral rectus muscle
Passes thru lacrimal gland
Reaches the skin of upper eyelid
40
What does the lacrimal nerve supply?
Lacrimal gland
| Skin of the upper eyelid
41
What other type of fibers does the lacrimal nerve send to the lacrimal gland
Parasympathetic (secretory) fibers
42
How does the other type of fibers from the lacrimal nerve get to the lacrimal gland?
Parasympathetic fibers originate from pterygopalatine ganglion (VII) reach lacrimal nerve by of the zygomatic nerve and zygomaticotemporal nerves (C.N. V2)
43
True or False
| Frontal branch is the biggest branch in the ophthalmic division.
True
44
Frontal nerve divides into two branches what are they?
Supratrochlear nerve
| Supraorbital nerve
45
Supratrochlear nerve conveys sensation from what structure?
Medial corner of the eye
46
Supraorbital nerve carries sensation from what structures?
1. Conjunctiva
2. Upper eyelid
3. Forehead
4. Mucous membrane from frontal sinus
47
True or False
| Nasociliary has the most branches coming off of it in the ophthalmic division?
True
48
Nasociliary has how many main branches and how many terminal branches?
What are their names?
3 Main branches
1. Communicating branch
2. Long Ciliary nerve
3. Posterior Ethmoid nerve
2 Terminal branches
1. Anterior ethmoid nerve
2. Infratrochlear nerve
49
Where does the communicating branch go to?
Ciliary ganglion
50
Communicating branch helps with what?
Corneal reflex
51
Long ciliary nerve supplies what structure?
The eyeball
52
Posterior ethmoid nerves carries sensory information from what structures?
Sphenoidal sinus
| Ethmoidal sinus
53
Anterior ethmoid divides into two nerves. What are they?
External nasal nerve
| Internal nasal nerve
54
External nasal nerve supplies what?
Skin over the nose
55
Internal nasal nerve supplies what structure?
Mucus membrane covering the anterior part of the nasal septum
56
What does the infratrochlear nerve supplies what?
Medial corner of the eye
| Lacrimal sac
57
Maxillary Division enters the ____________ through the____________.
```
Pterygopalatine fossa
Foramen rotundum (round foramen)
```
58
True or False
| Maxillary division is the only branch with motor fibers.
False
| Mandibular branch
59
Maxillary division carries sensation from what structures?
The skin
1. Btwn Eyes and Mouth
2. Over Cheeks and Temples
Mucosa Lining
1. Maxilary sinus
2. Nasal Conchae
3. Palate
4. Gingiva
60
What are the branches that the Maxillary Division gives off?
1. Middle Meningeal N.
2. Zygomatic N
3. Ganglionic Branches
4. Infraorbital N.
61
What nerve is given off before the Maxillary nerve leaves the round foramen?
Middle meningeal N.
62
What does the middle meningeal supply?
The meninges of the middle cranial fossa
63
Zygomatic nerve enters the _______ thru the_________________.
Orbit
| Inferior orbital fissure
64
What are the nerves that come off the zygomatic nerve?
1. Communicating Branch
2. Zygomaticotemporal Branch
3. Zygomaticofemoral
65
Communicating branch from zygomatic nerve carries what type of fibers?
Postganglionic Parasympathetic fibers
66
Communicating branch of zygomatic nerve carries fibers from ________ going to _____________.
Pterygopalatine ganglion
| Lacrimal gland
67
Zygomaticotemporal nerve supplies what?
Skin over the temple
68
Zygomaticofacial supplies what?
Skin over the cheek
69
Ganglionic branches carry sensory information from where?
Upper pharynx
Nasal cavity
Palate
70
True or False
| Ganglionic branches sensory information pass thru the geniculate ganglion to the maxillary division.
False
| Pterygopalatine ganglion
71
Infraorbital nerve travels thru what 2 structures?
Infraorbital fissure
| Infraorbital Canal
72
What does the infraorbital nerve supply?
Lower eyelid
Skin over the upper jaw
Maxillary sinus
73
Infraorbital nerves gives off 3 nerves, what are they?
Anterior Superior Alveolar N.
Middle Superior Alveolar N.
Posterior Superior Alveolar N.
74
What plexus is found just above the alveoli?
Superior dental plexus
75
What type of fibers from the Maxillary division are used to distribute from the pterygopalatine ganglion?
Postganglionic Parasympathetic fibers
76
What type of fibers reach the pterygopalatine ganglion from the greater petrosal nerve?
Preganglionic Parasympathetic fibers
77
What type of fibers from the Superior Cervical ganglion pass thru the pterygopalatine ganglion
Postganglionic sympathetic fibers
78
True or False
| The sensory root is Large in the Mandibular division
True
79
True or False
| The motor root is large in the mandibular division
False
| Small
80
True or False
| The Mandibular division is only motor
False
| Both sensory and motor
81
True or False
| The motor and sensory root of the Mandibular division exit the foramen ovale as one root
False
| Two separate roots and combine later
82
Where does the sensory and motor root combine in the Mandibular division?
Infratemporal fossa
83
Mandibular division carries sensory information from what structures?
Skin over the
1. Mandible
2. Posterior cheek
3. Posterior temple
Mucosa of the
1. Lower oral cavity
2. Cheek
84
How many muscles are innervated by the Mandibular division and what are these Group of muscles called?
8
| Muscles of mastication
85
What are the muscles innervated by the Mandibular division?
1. Masseter
2. Temoralis
3. Medial Pterygoid
4. Lateral Pterygoid
5. Tensor Veli Palatini
6. Tensor Tympani
7. Mylohyoid
8. Anterior belly of Digastric
86
Two branches are given off in the infratemporal fossa what are they?
Recurrent Meningeal Branch
| Medial Pterygoid N.
87
Where are the Recurrent Meningeal Branch and the Medial Pterygoid N. Given off in the Mandibular division?
Infratemporal fossa
88
What is another name for the Recurrent Meningeal Branch?
Nervus Spinosum
89
Where does the Recurrent Meningeal Branch enter the cranium thru?
Foramen Spinosum
90
Recurrent Meningeal Branch is sensory or motor or both?
Sensory
91
Where does the Recurrent Meningeal Branch carry info from?
Dura of the
1. MiddleCranial Fossa
2. Anterior cranial Fossa
3. Calvarium
92
Is the Medial Pterygoid N. Sensory, motor or mixed?
Motor
93
What does the Medial Pterygoid N. supply?
Medial Pterygoid
Tensor Veli Palatine
Tensor Typani
94
What’s special about the fibers from the Medial Pterygoid N. That supply’s the Tensor Veli Palatine and Tensor Tympani?
They pass thru the optic ganglion
95
What type of nerve fibers does the optic ganglion send out?
Postganglionic Parasympathetic fibers
96
In the Mandibular Division after the 2 branches are given the nerve divides into predominantly 2 divisions. What are the two division it breaks into?
Motor Anterior Division
| Sensory Posterior Division
97
What nerves does the Anterior Division of the Mandibular Nerve give rise to?
1. Masseter
2. Deep Temporal
3. Lateral Pterygoid
4. Buccal
98
What nerve in the Anterior Division in the Mandibular division is the Major sensory branch in the division?
Buccal
99
What nerves give sensory info in the Anterior Division in the Mandibular division
Buccal
| Masseter (he’s special, cause he’s also motor...super cute)
100
What is special about the Masseter N.?
The nerve is both motor and sensory (#mixed)
101
What does the Masseter N supply?
Motor function to Masseter
| Sensory info from tempromandibular joint (TMJ)
102
Lateral Pterygoid supplies what?
```
Lateral Pterygoid
(Medial Pterygoid N. does more work)
```
103
What is special about the Deep temporal nerve?
It splits into two branches
| Ant. And Post.
104
What does the deep temporal n. supply?
Both branches of this n. (Ant and Post.) supply Temporalis muscle
105
Buccal nerve conveys sensation from what?
1. The cheek
| 2. The Buccal gingival of the molars
106
What are the nerves given off in the Posterior division of the Mandibular Division?
1. Auriculotemporal
2. Lingual
3. Inf. Alveolar
107
What nerves also has motor function in the posterior division of the Mandibular division?
Auriculotemporal n. (Postganglionic Parasympathetic) (So small)
Inferior Alveolar n.
108
What is the pathway of the Auriculotemporal n?
Passes thru the parotid gland, post to TMJ, and into the infratemporal fossa
109
What does the Auriculotemporal N carry?
Sensory info from skin of the
1. Temple
2. Ear
Postganglionic Parasympathetic fibers from otic ganglion
110
The lingual N covers info from what structure?
Mucosa of the oral cavity
111
True or False
| Lingual nerve combines with Cranial Nerve 7 in the infratemporal fossa
True
112
What nerve does the lingual nerve combine with in the infratemporal fossa?
The chorda tympani
| From C.N.7
113
The inf. Alveolar n. carries sensory info from what structures?
1. Lower teeth
| 2. Chin
114
True or False
| The inferior alveolar nerve has two branches.
True
115
True or False
| The lingual nerve has two branches.
False
116
What are the two branches of the inf.alveolar n.?
1. Incisive Branch
| 2. Mental N.
117
Incisive Branch supplies what?
1. Incisors
2. Canines
3. 1st premolars and adjacent gingival
118
Mental nerve supplies what?
1. Labial gingival adjacent to incisors
| 2. Skin of the lower lip
119
What do the motor fibers do in the inf. alveolar n.?
Diverge from the n. Prior to passing thru the Mandibular foramen
120
What does the motor fibers of the inf. alveolar n. supply?
1. Mylohyoid
| 2. Ant. belly of the digastric Muscle
121
What 2 autonomic ganglia communicate with the Mandibular division?
Submandibular
| Otic
122
What does the submandibular ganglia in the Mandibular division receive?
Preganglionic fibers from C.N7 by the lingual nerve AFTER it combines with chorda tympani
123
What does the otic ganglion do in the Mandibular Division?
Send postganglionic fibers to parotid gland by the Auriculotemporal n.
124
In some cases what else can the lingual nerve do?
Convey taste info (special sensory) to chorda tympani
125
What is the clinical consideration you need know for the trigeminal nerve?
1.Trigeminal Neuralgia- Short burst of pain on one side of the face
(Tic Douloureux)
2.Dental consideration-top teeth:Can individually numb teeth
bottom teeth: Whole row of teeth are numbed
