Week 5 Cranial Nerves Flashcards
1
Q
CN I
A
Olfactory
2
Q
CN II
A
Optic
3
Q
CN III
A
Occulomotor
4
Q
CN IV
A
Troclear
5
Q
CN V
A
Trigeminal
- Opthalmic division
- Maxillary division
- Mandibular division
6
Q
CN VI
A
Abducens
7
Q
CN VII
A
Facial
8
Q
CN VIII
A
Vestibulocochlear
9
Q
CN IX
A
Glossopharyngeal
10
Q
CN X
A
Vagus
11
Q
CN 11
A
Accessory (spinal)
12
Q
CN 12
A
Hypoglossal
13
Q
Cribiriform plate CN
A
Olfactory (CN 1)
14
Q
Optic canal CN
A
Optic (CN II)
15
Q
Superior orbital fissure CN
A
Occulomotor (CN III)
Troclear (CN IV)
Opthalmic Division of Trigeminal (CN V(VI))
Abducens (CN VI)
16
Q
Foramen rotundum CN
A
Maxillary Division of Trigeminal (CN V(V3))
17
Q
Foramen ovale CN
A
Mandibular Division of Trigeminal (CN V(V2))
18
Q
Internal acoustic meatus CN
A
Facial (CN VII)
Vestibulocochlear (CN VIII)
19
Q
Jugular foramen CN
A
Glossopharyngeal (CN IX)
Vagus (CN X)
Accessory (CN XI)
20
Q
Hypoglossal canal
A
Hypoglossal (CN XII)
21
Q
Preganglionic parasympathetics are caried by these 4 cranial nerves
A
III
VII
IX
X
22
Q
All postganglionic fibers ‘piggy back’ on
A
A branch of the trigeminal to arrive at the structure that they innervate
23
Q
Preganglionic parasympathetic fibers arise from
A
Nuclei in the brain stem and synapse at 4 ganglia in the head
24
Q
Preganglionic parasympathetic fibers synapse at
A
4 ganglia in the head
- ciliary
- pterygopalantine
- otic
- submandibular
25
4 ganglia in the head where preganglionic parasympathetic fibers synapse
Cilliary
Pterygopalatine
Otic
Submandibular
26
Olfactory Nerve
CN I
Special sensory
Sensation of olfaction or smell
27
Optic Nerve
CN II
Special sensory
To convey visual information from the retina
28
3 Nerves to Ocular Muscles
III - Oculomotor
IV - Trigeminal
VI - Abducens
29
12 Cranial Nerves in order
```
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glosspharyngeal
Vagus
Accessory
Hypoglossal
```
30
12 Cranial Nerves dirty mnemonic
```
oh
oh
oh
to
touch
and
feel
virgin
girls
vagina
and
hymens
```
31
12 Cranial Nerve sensory/motor mnemonic
```
Some
Say
Marry
Money
But
My
Brother
Says
Big
Breasts
Matter
Most
```
32
Oculocmotor Nerve
CN III
Somatic motor - supplies four extrinisc eye muscles (superior, medial and inferior rectus, and inferior oblique) that move eyeball. Supplies levator palpebrae superioris muscle to elevate eyelid.
visceral motor - constricts pupils (sphincter pupillae) and ciliary muscles to make lens of eye more spherical (as needed for near vision)
Nerve damage:
Ptosis (eyelid droop), paralysis of eye muscles leading to strabismus (eyes not in parallel/deviated improperly), diplopia (double vision)
33
Efferent =
Motor
34
Trochlear Nerve
CN IV - means pulley
Somatic motor - supply the superior oblique muscle of the eye
Very thin, with injury can easily be torn
Damage leads to paralysis of superior oblique leading to strabismus and diplopia
35
Strabismus
Eyes not in parallel, deviated improperly
36
Diplopia
Double vision
37
Abducens Nerve
CN VI
Innervates the lateral rectus eye muscle for eye abduction (which abducts the eye) = pulls away laterally
Damage results in paralysis of lateral rectus limits lateral movement of eye, diplopia
38
Trigeminal Nerve
CN V
Branchial motor - special visceral efferent - mastication, tensor tympani, tensor palantini, mylohyoid and anterior belly of digastric
General sensory - from face and scalp as far as the top of the head, conjunctiva, bulb of the eye, teeth, tongue, typmpanic membrane
39
3 Trigeminal Branches
CN V1 Ophthalmic nerve
CN V2 Maxillary nerve
CN V3 Mandibular nerve
40
Ophthalmic Nerve
CN V1
Somatic sensory: Forehead, top of scalp, eyelid, top of nose
Lacrimal nerve piggybacks
41
Maxillary Nerve
CN V2
Somatic sensory: Maxillary, sides of nose, upper lip
Zygomatic nerve piggybacks
42
Mandibular Nerve
CN V3
Somatic sensory: Sides of face near ear, mandible
General sensation to anterior 2/3 of tongue
Auriculotemporal nerve and Lingual nerve piggybacks
43
Anterior 2/3 of tongue
General sense CN V3 (Trigeminal Nerve, Madibulary part)
| Special sense from facial nerve
44
Posterior 1/3 of tongue
Special sense and general both glossopharyngeal
45
Facial Nerve
```
Branchial motor (special visceral efferent) - supply the stapedius, stylohyoid, posterior belly of digastric muscles
General sensory - sensory to ear
```
46
Vestibulocochlear Nerve
CN VIII
Conducts equilibrium and auditory sensations to brain
Cochlear branch conducts impulses for hearing, vestibular branch conducts impulses for equilibrium
Damage - loss of balance, vomiting and dizziness, deafness
47
Glossopharyngeal Nerve
CN IV
Most components in a nerve that doesn't go many places. At back of pharynx
Branchial motor - supplies stylopharyngeus
Visceral motor-carries sensation from carotid body and from carotid sinus (sense blood gas and bp)
Posterior 1/3 of the tongue general and special sensory
48
Vagus Nerve
CN X - The Wanderer
Branchial motor - pharynx and larynx
Visceral motor - thorax and abdominal
49
Accessory Nerve
```
CN XI (aka Spinal Accessory)
Somatic motor function - innervates trapezius and sternocleidomastoid
```
50
Hypoglossal Nerve
CN XII
Innervates intrinsic and extrinsic tongue muscles
Damage swallowing and speech difficulties due to impaired tongue movement, if only one, deviates to one side of damaged nerve
