Cranial Nerve Flashcards
1
Q
Identify a and b
A
a: olfactor nerve (CN I)
b: optic nerve (CN II)
2
Q
Identify “c” and “d”
A
c: oculomotor nerve (CN III)
d: Trochlear nerve (CN IV)
3
Q
Identify e and f
A
e: trigeminal nerve (CN V)
f: Abducent n. (CN VI)
4
Q
Identify “g” and “h”
A
g: facial n. (CN VII)
h: Vestibular (CN VIII)
5
Q
Identify i and j
A
i: hypoglossal n. (CN XII)
j: Glossopharyngeal n. (CN IX)
6
Q
Identify K and L
A
K: Vagus (CN X)
L: Accessory n. (CN XI)
7
Q
Olfactory nerve is what CN?
A
I
8
Q
Hypoglossal n. is what CN nerve?
A
XII
9
Q
What is CN II
A
Optic n.
10
Q
What is CN XI
A
Accessory n.
11
Q
What CN is Oculomotor n.
A
CN III
12
Q
Which is CN X
A
Vagus n.
13
Q
Which CN is Glossopharyngeal n.
A
CN IX
14
Q
CN IV
A
Trochlear n.
15
Q
CN VIII
A
Vestibulocochlear n.
16
Q
Which CN is Trigeminal n.
A
CN V
17
Q
Which CN is Facial n.
A
CN VII
18
Q
CN VI
A
Abducent n.
19
Q
What foramen does the Olfactory n. go through
A
Cribiform plate of ethmoid
20
Q
What type of innervation does CN I (olfactory n.) give? To what structures does it give it to?
A
- Special sensory: smell
- Structures innervated: olfactory mucosa
21
Q
What is the end of the olfactory n. called?
A
olfactory bulb
22
Q
What is the name of the nerves coming off of the olfactory bulb and going through the cribriform plate?
A
olfactory nerves
23
Q
What foramen does the optic nerve travel through?
A
Optic canal
24
Q
What type of innervation does the optic nerve bring? What structures does it innervate?
A
- Special sensory: vision
- Structures innervated: Retina
25
What is the part of the optic nerve prior to the optic chiasm?
optic tract
26
What foramen does CN III (Oculomotor nerve) pass through
Superior orbital fissure
27
What type of innervation does the oculomotor n. supply?
* Somatic motor
* Parasympathetic
28
2 main branches of oculomotor n.
Superior and inferior division
29
What foramen does the Trochlear nerve pass through
Superior orbital fissure
30
What type of innervation does Trochlear n. supply. What structure does it innervate?
* Somatic motor
* Superior Oblique m.
31
What are the three main divisions of the Trigeminal nerve (CN V)
* Opthalmic (CN V1)
* Maxillary (CN V2)
* Mandibular (CN V3)
32
What foramina does the Opthalmic division of Trigeminal n. (CN V1) pass through
* Superior orbital fissure
* Supraorbital Foramen
33
What type of innervation does CN V1 (opthalmic division of Trigeminal) suppy? What structures does it innervate
* Somatic sensory
* skin on forehead; upper eyelid; dorsum of nose
34
What are the major branches of CN V1 (opthalmic division of Trigeminal)
* Frontal n.
- Supraorbital n.
- Supratrochlear n.
* Lacrimal n.
* Nasocilliary n. and its branches
35
What foramina does the maxillary division of Trigeminal (CN V2) pass through?
Foramen rotundum (picture shown); Infraorbital foramen
36
What type of innervation does maxillary division of Trigeminal (CN V2) suppy? What structures are innervated
* Somatic sensory
* Skin of lower eyelid; upper cheeck; side of nose; upper lip
37
What are the major branches off maxillary division of Trigeminal (CN V2
* Zygomatic n.
* Infraorbial n.
* Greater and lesser palatine n.
* Superior alveolar n.
38
What foramina does the Mandibular division of Trigminal nerve (CN V3) pass through?
* Foramen Ovale; Mandibular foramen; Mental foramen
39
What type of innrvation does mandibular division of Trigminal nerve (CN V3) supply? What structures does it innervate?
* Somatic sensory and Somatic motor
* Muscles of mastication; "Tensor" mm.; skin of lower cheek; temporal region; mandible; lower lip; anterior 2/3 tongue (somatic sensory)
40
What are the major branches of mandibular division of Trigminal nerve (CN V3) that supply somatic sensory
* Inferior alveolar n.
-- Mental n.
* Lingual n
* Auriculotemporal n.
* Buccal n.
41
What branch off of mandibular division of Trigminal nerve (CN V3) supplies motor innervation
N. to mylohyoid
42
What foramen does the Abducent n. (CN VI) travel through
Superior orbital fissure
43
What type of innervation does the abducent n. (CN VI) supply? What structures does it supply?
* Somatic motor
* Lateral rectus. m
44
What foramina does the facial nerve (VII) travel through?
* Internal acoustic meatus (pictured)
* Stylomastoid foramen
45
What type of innervation does the facial nerve supply
* Somatic motor
* Special sensory (taste)
* Parasympathetic
46
structures innervated by facial nerve
* muscles of facial expression
* anterior 2/3 tongue (taste)
* lacrimal gland
* submandibular gland
* sublingual gland
47
Major branches of the facial nerve that supply somatic motor innervation
To Zanzibar By Motor Car
* Temporal
* Zygomatic
* Buccal
* Marginal Mandibular
* Cervical
* Posterior auricular
48
Major branch of facial n. that supplies special sensory (taste)
* Chorda Tympani n. (hitchhikes on Lingual n. (CN V3)
49
Major branch of facial n. that supplies parasympathetic motor
Greater petrosal
50
What foramen does the Vestibulocochlear nerve (CN VIII) travel through
internal acoustic meatus
51
What type of innervation does the vestibulocochlear n supply. What structures are innervated?
* Special sensory (hearing; balance)
* Cochlea; vestibule
52
What are the two main branches of the vestibulocochlear n (CN VIII)
* vestibular n.
* Cochlear n.
53
What foramen does the Glossopharyngeal n (CN IX) pass through?
Jugular foramen
54
What type of innervation does th Glossopharyngeal nerve supply
* Somatic motor
* Somatic sensory
* Special sensory (taste)
* Parasympathetic
* Visceral sensory
55
What are the major branches off of the glossopharyngeal n
* Tympanic n.
* Lesser petrosal n.
56
What foramen does the vagus n (CN X) travel through
Jugular foramen
57
What type of innervation does the vagus nerve supply
* Somatic motor
* Somatic sensory
* Special sensory (taste)
* Parasympathetic
* Visceral sensory
58
Structures innervated by Vagus n
* Sensory and muscles of larynx
* muscles of pharynx and palate
* epiglottis
* thoracic and abdominal viscera
59
Major branches of vagus n.
* recurrent laryngeal n.
* Superior laryngeal n
- internal and external laryngeal n
* esophageal plexus
* anterior and posterior vagal trunks
60
What foramen does the accessory n. travel through
jugular foramen
61
What type of innervation does the accessory nerve (CN XI) supply. What structures are innervated
* somatic motor
* trapezius m.
* Sternocleidomastoid m.
62
What foramen does the hypoglossal nerve (CN XII) pass through
hypoglossal canal
63
What type of innrvation does hypoglossal n. supply. What structures are innervated
* somatic motor
* all tongue mm. (except palatoglossus)
64
What are the 4 parasympathetic ganglia of the head
* ciliary ganglion
* otic ganglion
* Pterygopalatine
* Submandibular
65
Parasympathetic innervation to cillary m. and constrictor pupillae m.
CN III -\> Ciliary ganglion (**synapse**) -\> Short ciliary n. (CN V1) -\> Target
66
List steps in parasympathetic pathway to parotid gland
CN IX -\> Tympanic n. -\> Tympanic plexus -\> Lesser petrosal n. -\> Otic ganglion (**synapse**) -\> hitchhike on auricotemporal n (CNV3) -\> parotid gland
67
Name NEW parasympathetic pathway to Lacrimal gland
CN VII -\> Greater Petrosal n. -\> N. to pterygoid canal -\> Pterygopalatine ganglion (**Synapse**) -\> direct branches from ganglion -\> Target
68
List parasympathetic pathway to submandibular and sublingual glands
CN VII -\> Chorda Tympani n. -\> Hitchhike on Lingual n. (CN V3) -\> Submandibular ganglion (**Synapse**)
1) -\> Submandibular gland
2) -\> back to lingual n. -\> Sublingual nerve
