12-4 CN I and II Flashcards Preview

NEUROLOGY > 12-4 CN I and II > Flashcards

Flashcards in 12-4 CN I and II Deck (24):
1

Describe These Cranial Nerve Componenents

ºGSE

ºGSA [3]

ºGVE / _______ [4]

ºGVA

ºSVE [2]

ºSVA [2]

ºSSA [3]

ºGSE= motor--->voluntary muscle

ºGSA= sensation FROM skin/muscle/joints

ºGVE/PARASYMPTHC=MOTOR to smooth muscle, [blood vessels] , glands & Lens

ºGVA= Visceral Pain & Sensation FROM internal organs/Guts

ºSVE= voluntary motor ---> [pharyngeal arch/Gill muscles] OR Facial Xpression m. !

ºSVA= TASTE & SMELL

ºSSA= vision / hearing / Balance

2

*The _____ is the site of emergence for Cranial Nerves
[__-__]

A: What comes from the Midbrain?

B: What comes from the PONS?

C: What comes from the MeDULLa?

*The BRAINSTEM is the site of emergence for CN3-12.

A: Midbrain = CN3 and CN4
--------------------------------------------------------------------------------------
B: PONS= CN5-8
--------------------------------------------------------------------------------------
B: MeDULLa= CN9-12

3

A: What's special about the [Nucleus of Solitary tract]? Explain this

B: CN nucleus for 8 is made up of which Nuclei?

C: GSA for CN5 is similar to ___ ____of the ______ tract because it relays __ and ___ BUT instead for the ____. It also used by Cranial Nerves _____ to relay the same for the __ ____

A: [Nucleus of Solitary tract] is the ONLY Cranial Nerve nucleus that has 2 components
RosTral NST = SVA = Taste

caudal nst= GVA = Visceral Pain
--------------------------------------------------------------------------------------
B: CN nucleus for 8 is made up of [4 Vestibular and 2 Cochlear Nuclei]

C: GSA for CN5 is similar to [Nucleus Proprius] of Spinothalamic tract because it relays pain and temp BUT FOR THE HEAD and used by CN7,9 and 10 to relay Pain & temp for the EAR PINNA too

4

Name the 4 Nuclei of [CN10 Vagus] and what their functional components associated are?

Vagus N. Nuclei
1. [Dorsal Motor Nucleus] = GVE

2. [Nucleus of Solitary Tract] = GVA & SVA

3. Nucleus Ambiguous = SVE

4. [Spinal trigeminal nucleus of V]= GSA (pain & temp for ear pinna)

5

A: Nuclei are arranged in ____ based on their __ ____ . ____ nuclei are near MIdline vs. _____ nuclei are more lateral
--------------------------------------------------------------------------------------
B: Lateral Stria of the __ ___synapses near the _____ which is why......... This is AKA __ _____

A: Nuclei are arranged in COLUMNS based on their FUNCTIONAL COMPONENTS. Motor nuclei are near MIdline vs. sensory nuclei are more lateral

B: Lateral Stria of the Olfactory Bulb synapses near the hippocampus--->smell memory is powerful! = "Nosmic memories"

6

[OCULOMOTOR ] nerve

1. Cranial Nerve # ?

2. Foramen Traveled? [2]

3. Component [2]

4. Function for each Component [2]

5. Name the Nucleus and their location [2]

[OCULOMOTOR] n.

1. CN3

2. Interpeduncular Fossa and SUPerior Orbital fissure {CN 3,4,5B1,6}

3. [GVE parasympathetic] and GSE
---------------------------------------------------------------------------------
4.
A: [GVE psmp]=uses ciliary ganglion to innervate ciliary muscle(fattens lens) & sphincter pupillae

B: GSE= Levator Palpebrae and MOST EYEBALL MUSCLES excluding [SUP oblique] and [Lateral Rectus]
---------------------------------------------------------------------------------
5.
A: [Edinger-Westphal] nc-->MIDBRAIN

B: Oculomotor nc --->MIDBRAIN

7

[ OPTIC ] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Component

4. Function for each Component

5. Name the Nucleus and their location

[OPTIC] n.
1. CN2

2. Optic Foramen canal

3. SSA

4. SSA= Vision (Retina)

5. [Lateral Geniculate Nucleus] -->Thalamus

8

[ OLFACTORY ] nerve

1. Cranial Nerve # ?

2. Foramen Traveled thru? >> What special structure sits on top of this "Foramen"?

3. Component

4. Main Structures/Function for each Component

[OLFACTORY] n.

1. (CN1)

2. [Ethmoid Cribriform Plate] (transmits CN1 tiny branches)>> which has [Crista Galli/ Crown of Cock] sitting on top projecting superiorly

3. SVA

4. SVA= Olfactory nasal mucosa / SMELL

9

[TROCHLEAR] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Component

4. Function for each Component

5. Name the Nucleus and its location

6. What's special about this Cranial Nerve?

7. is CN4 Trochlear an upper motor neuron or Lower Motor Neuron?

[TROCHLEAR] n.

1) CN4
---------------------------------------------------------------------------------
2) SUPerior Orbital fissure {CN 3,4,5B1,6}
---------------------------------------------------------------------------------
3. GSE

4. GSE= SUPerior Oblique eyeball muscle

5. Trochlear nc---->MIDBRAIN

6. Has LONGEST intracranial exposure and is ONLY CN to originate from Dorsum BRAINSTEM AND to Cross OVER

7. LOWER MOTOR NEURON

10

" SVE Sara , ___ me 2 Geese!...and ____ some Gas GE!"

"SVE SSA, [GVE me 2 GSE]!...and [SVE some GSA] GE!

11

A: The Trochlear Nucleus is responsible for __ to the __ ___ muscle and is very ___[Large/small] . It's found on top of ___ at the level of the __ _____, which golfballs the Lateral Lemniscus.

B: What is the Lateral Lemniscus involved in?

C: What part of the brainstem is all this in?

A: The Trochlear Nucleus is responsible for GSE to the [SUP Oblique m.] and is very small. It's found on top of MLF at the level of the [inf colliculus], which golfballs the [Lateral Lemniscus].

B: [Lateral Lemniscus] is used for hearing

C: Caudal MIDBRAIN

12

[TriGeminal] nerve B1 vs. B2 vs. B3

1. Cranial Nerve # ?

2. Foramen Traveled for each 3?

3. Component [2]

4. Main Structures/Function for each Component
SVE[4]
vs.
GSA[2]

5. Name the Nucleus and their purposes [4]

[TriGeminal] n.
1. CN5
---------------------------------------------------------------------------------
2.
B1/Opthalmic = SUP Orbital fissure {CN 3,4,5B1,6]
B2/Maxillary = Foramen Rotundum
B3/mandibular= Foramen Ovale
---------------------------------------------------------------------------------
3. GSA and SVE
---------------------------------------------------------------------------------
4.
•GSA=
Pain & Temp for Most Head & Face

•••SVE=
1) Motor to ALL mastication muscles
2) ANT Belly Digastric
3) [First Arch muscles]
4) Tensor Veli palatine & tympani
--------------------------------------------------------------------------------------

5.
[Spinal Trigeminal Nucleus of V]= Pain and Temp for Most Head & Face

[Chief Principle Sensory nc. of V]= position

[Mesencephalic nucleus of V]= similar to DRG but sucked into brainstem! = has pseduounipolar neurons tht relay afferent limb of "jaw-jerk" reflex (stretches masseter m.)

[Trigeminal motor nucleus] = Mastication m.!

13

A: [Trigeminal Semilunar ganglion] is located in ____ Sinus. and it contains ____ Cells.

B: The [Spinal Trigeminal Nucleus of V] is the HEAD/FACE version of __ _____ located in the Spinal Cord

C: [Chief Principle Sensory] nc. of CN5 is the HEAD/FACE version of __ ______ located in the Spinal Cord

A: [Trigeminal Semilunar ganglion] is located in Cavernous Sinus. It contains Pseudounipolar Cells.

B: The [Spinal Trigeminal Nucleus of V] is the HEAD FACE version of [Nucleus Proprius] located in the Spinal Cord

C: [Chief Principle Sensory] nc. of CN5 is the HEAD/FACE version of [Nucleus Cuneatus/GRacilis] located in the Spinal Cord

14

WEIRD STUFF:

A: Pain and Temp for the EAR PINNA are relayed from CN Nuclei ____USING______to get there

B: which functional component is this?

WEIRD STUFF:

Pain and Temp for the EAR PINNA are relayed from CN Nuclei 7,9,10 USING [Spinal Trigeminal Nucleus & Tract of V] to get there :-O

Functional Component = GSA

15

[Mesencephalic nucleus of V] is similar to a ___ but instead sucked into the _____! It contains ____ neurons tht relay ____ limb of ___ _____reflex. Stretching the _____ muscle will elicit this reflex using [Mesencephalic nucleus of V]

[Mesencephalic nucleus of V]= similar to DRG but sucked into brainstem! = has pseudounipolar neurons tht relay afferent limb of "jaw-jerk" reflex Stretching the MASSETER muscle will elicit this reflex using [Mesencephalic nucleus of V]

16

[ABDUCENS] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Component

4. Main Structures/Function for each Component

5. Name the Nucleus and its location

[ABDUCENS] n.

1. CN6
2. SUPerior Orbital Fissure {3,4, 5B1, 6}

3. GSE

4. GSE= motor to Lateral Rectus muscle {LR6}

5. Abducens Nucleus ----> Pontomedullary junction in Pons

17

A: What are the 2 Salivary Nucleus used for?
---------------------------------------------------------------------------------
B: What is the Nucleus Ambiguous

A: The [SUP Salivatory nucleus] is Parasympathetic for Crying and Saliva of the Face----> CN7

vs. [inf Salivatory nucleus] = used by CN9 for Parotid Gland
---------------------------------------------------------------------------------
B: Nucleus Ambiguous = Ambiguous nuclei used by Both CN9 and CN10 for SVE only!

18

List the 5 Components of [Facial CN7] and EACH of their purposes
1. GVA
2. SVA
3. GVE [4]
4. SVE [4]
5. GSA

B: Name the Nucleus that correspond to each component

[Facial CN7] Components

1. GVA= soft palate deep sensation--->[Lower NST]

2. SVA=Tongue TASTE from anterior 2/3--> [upper NST]

3. GSA= Pain & Temp of [Ear pinna] -->[Spinal Trigeminal Nucleus of V]

4. [GVE]= motor to submand., subling, lacrimal & [nasal mucosa] glands---> [SUP Salivatory nucleus]

5. SVE= motor to facial express muscle, POST belly digastric, stylohyoid, stapedius --> [Facial motor nuc. of 7]
----------------------------------------------------------------------------------

B: [GVE/parasympathetic] & SVE

19

[Vestibulocochlear Auditory] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Component

4. Function for each Component [2]

5. Name the Nucleus and their location [2]

6. Is Hearing something easy or hard to lose?

[Vestibulocochlear Auditory] n.

1. CN8

2. internal auditory meatus [along with CN7]

3. SSA [cochlear n. vs. Vestibular n.]

4.
A: SSA cochlear = [Organ of Corti] in cochlear duct
B: SSA vestibular = semicircular canals

5.
A: (2 cochlear Nuclei)---> MEDULLA in [4th ventricle lateral recess]
B: (4 Vestibular Nuclei)----> MEDULLA in [4th ventricle lateral recess]

6. Hearing is HARD to knock out because it's Bilateral

20

[Glossopharyngeal] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Components and Nuclei associated
ºGVA [3]
ºSVA
ºGVE
ºSVE
ºGSA

4. Function for each Component

[Glossopharyngeal] n.

1. CN9

2. Jugular Foramen

3. GVA[3] / SVA / GSA / GVE(hitches ride) / SVE

4.
ºGVA[3]=[bp via carotid sinus], sensory soft palate, pharynx --->{LOWER NST}

ºSVA= Tongue TASTE----> {Upper NST}

ºGSA= Pain & Temp of Ear Pinna (via [Spinal Trigeminal nucleus of V] )

ºGVE= "GLOAP"--> parotid salivary gland{secretomotor}--->{inf. salivatory nucleus]

ºSVE = Stylopharyngeaus m. ---> [nucleus Ambiguous]

21

A: What are the Functions for each Component of the Vagus Nerve [CN__]
ºGVA [4]
ºSVA
ºGVE [2]
ºSVE [4]

ºGSA

B: List the Associated Nucleus with each

C: What part of the Brainstem are all of these located?

VAGUS n. = CN10

ºGVA= DEEP visceral sensory to (ALET) abd, larynx, esophagus & trachea---> {Lower NST}

ºSVA= Taste buds @ epiglottis [back of throat]--> {upper NST}

ºGSA = Pain & Temp of Ear Pinna (via [Spinal Trigeminal nucleus of V] )

ºGVE= [smooth muscle respiratory or GI ] & [Slows HR via SA /AV node]--->{Dorsal Motor nc. of 10}

ºSVE---> [Nucleus Ambiguous]
1. All pharynx muscles (except stylopharyngeus)
2. All PALATE muscles (except tensor palatini )[includes Palatoglossus]
3. [Larynx & Cricothyroid]

C: ALL OF THIS IS IN MEDULLA!

22

[Spinal Accessory] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Component

4. Function for each Component

5. Name the Nucleus and its location

[Spinal Accessory]
1. CN11

2. Jugular Foramen AND Foramen Magnum

3. SVE

4. SVE=motor to Sternocleidomastoid & Traps

5. [Spinal Accessory nucleus]---->(C1-C5 Spinal Cord)

23

[Hypoglossal] nerve

1. Cranial Nerve # ?

2. Foramen Traveled?

3. Component

4. Function for each Component [2]

5. Name the Nucleus and its location

[Hypoglossal] n.
1. CN12

2. Hypoglossal Canal

3. GSE

4. GSE= Intrinsic/EXtrinsic tongue muscles mvmnt

5. Hypoglossal Nucleus ---> MEDULLA

24

A: During Development The __ ___ DIVIDES the [__ Sensory Plate] from the [___ Motor Plate].

B: Which plate lies more MEDIAL toward MIDLINE?

A: During Development The Sulcus Limitans DIVIDES the [Alar Sensory Plate] from the [Basal Motor Plate].

B: [Basal MOTOR Plate] lies more MEDIAL toward MIDLINE