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Neuroscience I Exam #1 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

Cranial nerves

A 
1 - Olfactory n.
2 - Optic n.
3 - Oculomotor n.
4 - Trochlear n.
5 - Trigeminal n.
6 - Abducens n.
7 - Facial n.
8 - Vestibulocochlear n.
9 - Glossopharyngeal n.
10 - Vagus n.
11 - Spinal accessory n.
12 - Hypoglossal n.
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2
Q

GSE

A

General somatic efferent

Somatic muscle.

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3
Q

GVE

A

General visceral efferent

ANS to smooth and cardiac muscle and glands.

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4
Q

SVE

A

Special visceral efferent

Supplies muscles derived from pharyngeal arches.

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5
Q

GSA

A

General somatic afferent

Sensory in skin, joints, tendons, muscles (ectoderm).

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6
Q

GVA

A

General visceral affarent

Sensory to visceral structures (endoderm)

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7
Q

SSA

A

Special somatic afferent

Hearing, balance and sight.

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8
Q

SVA

A

Special visceral afferent

Taste and smell.

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9
Q 
CN I
SS
Fibers
S/M/B
Exits via
A 
Olfactory n.
SS - nasal cavity
Fibers - SVA
S/M/B - Sensory
Exits via - olfactory foramina of cribiform plate to olfactory bulb.
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10
Q

Fx of the cribiform plate can cause:

A

CSF rhinorrhea

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11
Q

How is CN I tested?

A

With several different odors.

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12
Q 
CN II
SS
Fibers
S/M/B
Exits via
A

SS - retina
Fibers - SSA
S/M/B - Sensory
Exits via - Optic canal

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13
Q

Where does CN II terminate?

A

Geniculate bodies of thalamus

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14
Q

Testing CN II

A 
Light and dark testing
Finger counting
Snellen's test (80/20)
Visual field test
Peripheral vision test
Pupillary light reflex
Blink reflex
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15
Q 
CN III
SS
Fibers
S/M/B
Exits via
A

SS - motor to 4 extra-ocular ms. and PSNS to pupil and ciliary ms.
Fibers - GSE and GVE.
S/M/B - Motor
Exits via - Superior orbital fissure

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16
Q 
CN IV
SS
Fibers
S/M/B
Exits via
A

SS - motor to superior oblique m.
Fibers - GSE
S/M/B - Motor
Exits via - Superior orbital fissure

17
Q 
CN VI
SS
Fibers
S/M/B
Exits via
A

SS - motor to lateral rectus m.
Fibers - GSE
S/M/B - Motor
Exits via - Superior orbital fissure

18
Q

Testing Levator palpebrae superioris m. (CN III)

A

Levator palpebrae superioris m. - hold forehead down and eyelid and have pt try to open.

19
Q

Testing superior rectus m. (CN III)

A

Abduct eye, then look up.

20
Q

Testing inferior rectus m. (CN III)

A

Abduct eye, then look down.

21
Q

Testing inferior oblique m. (CN III)

A

Adduct eye, then look up.

22
Q

Testing medial rectus m. (CN III)

A

Adduct eye.

23
Q

Check which muscle when testing CN IV

A

Superior oblique m.

24
Q

Check which muscle when testing CN VI

A

Lateral rectus m.

25
Q 
CN V
SS
Fibers
S/M/B
Exits via
A

SS - sensation everywhere and motor to muscles of mastication.
Fibers - GSA and SVE
S/M/B - Both
Exits via - V1 ophthalmic n. (S.O.F.), V2 maxillary n. (foramen rotundum) and V3 mandibular n. (foramen ovale)

26
Q 
CN VII
SS
Fibers
S/M/B
Exits via
A

SS - motor to ms. of facial expression, PSNS to lacrimal, nasal and palatine glands, taste of anterior 2/3 of tongue and sensation to external acoustic meatus.
Fibers - SVE, GVE, SVA, GSA
S/M/B - Both
Exits via - internal acoustic meatus and stylomastoid foramen.

27
Q

Testing of Facial n.

A

Sensation of tongue.
Wrinkle forehead, blow whistle, smile, suck straw.
Blink reflex
Corneal reflex

28
Q 
CN VIII
SS
Fibers
S/M/B
Exits via
Divsions
A 
SS - sense of hearing and equilibrium.
Fibers - SSA
S/M/B - Sensory
Exits via - internal acoustic meatus
Vestibular and cochlear division.
29
Q

Testing CN VIII - vestibular division (3)

A

Romberg’s sign - balance, feet together, extend arms at sides, close eyes.
Past pointing - finger to nose, w/ and w/o eyes open.
Nystagmus - abnormal movement when eye scans the room.

30
Q

Testing CN VII - cochlear division (4)

A

Conduction deafness (wax, obstruction).
Whispering/rubbing fingers.
Rinne test
Weber’s test

31
Q 
CN IX
SS
Fibers
S/M/B
Exits via
A

SS - sensation of ear and post 1/3 of tongue, sensory from oropharynx and carotid body, taste of post 1/3 of tongue, PSNS to post 1/3 of tongue, motor to stylopharyngeus ms.
Fibers - GSA, GVA, SVA, GVE, SVE
S/M/B - Both
Exits via - jugular foramen

32
Q

CN IX is tested at same time as:

A

CN X

33
Q 
CN X
SS - tons
Fibers
S/M/B
Exits via
A

SS - tons of stuff
Fibers - SVA, GVA, GSA, GVE, SVA
S/M/B - Both
Exits via - jugular foramen

34
Q 
CN XI
SS
Fibers
S/M/B
Exits via
A

SS - SCM m. and Trapezius m.
Fibers - GSE
S/M/B - Motor only
Exits via - jugular foramen

35
Q 
CN XII
SS
Fibers
S/M/B
Exits via
A

SS - tongue ms.
Fibers - GSE
S/M/B - Motor
Exits via - hypoglossal canal

36
Q

Which nerves have GSE fibers?

A

CNs 3, 4, 6, 12

37
Q

Which nerves have GSA fibers?

A

CNs 3, 7, 9, 10

38
Q

Which nerves have SVE fibers?

A

CNs 5, 7, 9, 10

39
Q

Which nerves have SSA fibers?

A

CNs 2, 8

Neuroscience I Exam #1 (25 decks)

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