Cranial Nerves & Disorders Flashcards
(36 cards)
[OLFACTORY] nerve
- Cranial Nerve # ?
- Foramen Traveled thru? >> What special structure sits on top of this “Foramen”?
- Component
- Main Structures/Function for each Component
[OLFACTORY] n.
- (CN1)
- [Ethmoid Cribriform Plate] (transmits CN1 tiny branches)>> which has [Crista Galli/ Crown of Cock] sitting on top projecting superiorly
- SVA
- SVA= Olfactory nasal mucosa / SMELL
[OPTIC] nerve
- Cranial Nerve # ?
- Foramen Traveled?
- Component
- Main Structures/Function for each Component
- Name the Nucleus and their location
[OPTIC] n.
1. CN2
- Optic Foramen canal
- SSA
- SSA= Vision (Rods & Cones)
- [Lateral Geniculate Nucleus] –>Thalamus
[OCULOMOTOR] nerve
- Cranial Nerve # ?
- Component [2]
- Function for each Component [2]
- Name the Nucleus and their location [2]
[OCULOMOTOR] n.
- CN3
- ## [GVE parasympathetic] and GSE
- A: [GVE psmp]=uses ciliary ganglion to innervate [ciliary muscle(fattens lens) & sphincter pupillae]–> Pupil constriction
- A: [Edinger-Westphal] nc: MIDBRAIN
B: Oculomotor nc: MIDBRAIN
Attached Image shows [Oculomotor CN3 lesion]
[TROCHLEAR] nerve
- Cranial Nerve # ?
- Foramen Traveled?
- Component
- Function for each Component
- Name the Nucleus and its location
3) Explain eye movement directionality of
[Inferior Oblique m.] & the [Superior Oblique m.]
[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) I O U O, SO DO
Inferior Oblique Up Out
Superior Oblique Down Out
[TriGeminal] nerve B1 vs. B2 vs. B3
- Cranial Nerve # ?
* Components = GSA and SVE*
2A. Function of GSA
2B. Function of SVE (3)
- Name the Nucleus and their purposes [3]
B: UMN Corticobulbar lesions of [Trigeminal CN5] would manifest what jaw sx? (2)
C: LMN lesions of [Trigeminal CN5] would manifest what jaw sx? (2)
[TriGeminal] n.
1. CN5
——————————————————————————
3. GSA and SVE
——————————————————————————-
4.
•GSA=
Pain & Temp for Most Head & Face
•••SVE= [Motor to ALL mastication muscles (masseter + temporalis) via UMN corticobulbar control] + ANT Belly Digastric & [First Arch muscles reflex]
B: [Jaw weakness with no jaw deviation] + [Brisk Jaw Jerk Reflex]
C: [Jaw deviates to side of LMN lesion] + [Masseter/Temporalis muscle atrophy]
Describe what the GSA component of the
[Trigeminal/CN__] innervates?
ºB1/Opthalmic (2)
ºB2/Maxillary (3)
ºB3/mandibular (3)
B: What causes Trigeminal Neuralgia in younger vs. Older pts?
C: Clinical Manifestation
D: Tx (3)
[Trigeminal/CN5] ALL BRANCHES
GSA= face SENSORY
ºB1(upper face skin) + Corneal Reflex
ºB2(mid face skin, upper teeth,lower nose) /
ºB3 ([lower face/jaw/mouth], outer ear pinna,
ANT 2/3 tongue-Touch)
B: [Younger pts= MS / Older pts= Tortuous blood vessels compressing CN5]
C: [Lightning-like jabs of pain (mostly in B2 or B3 area)
D:
-[Anticonvulsants vs. Destroy nerve branch vs. move blood vessel]
* Chorda Tympani n. *
1) What Parent nerve does this come from and which Component is it?
2) What stuff does this innervate?
3) Where exactly does this nerve branch from its Parent?
“Drink 7 Up…You’ll TASTE it”
1) Facial CN7 [SVA]
2) [Tongue TASTE]
3) Branches from Facial CN7 BEFORE CN7 exits [Stylomastoid] process
[ABDUCENS] nerve
- Cranial Nerve # ?
- Component
- Main Structures/Function for each Component
- Name the Nucleus and its location
[ABDUCENS] n.
- CN6
- GSE
- GSE= motor to Lateral Rectus muscle {LR6}
- Abducens Nucleus —-> Pontomedullary junction in Pons
A: The [middle meningeal artery] transmits thru which foramen? ———————————————————————————
B:Describe LR6 (SO4) 3
A: Foramen Spinosum ———————————————————————————
B: ºLateral Rectus = CN6/Abducens ºSUPerior Oblique = CN4/Trochlear ºCN3/OCCULOMOTOR = ALL OTHER EYEBALL MUSCLES
Name the Nerve you’d use….
A: …To See
B: ….To “Focus” & accommodate after seeing [which associated muscle?]
C: …Looking at BRIGHT Light [which associated muscle?]
D: …lifting eyelids & opening eyes
E: ….FORCING ur eyes shut!
Nerve you’d use…
A:…to see= CN2/OPTIC
B:…to “Focus” & accommodate after seeing= CN3/Occulomotor [Ciliary muscle]
C: …looking @ BRIGHT light= CN3/Occulomotor [Sphincter Pupillae m.]
D:..lifting eyelids= CN3/Occulomotor [Levator Palpebrae m.]
E: …FORCING eyes shut!= Facial CN7
1) Which autonomic nerve system Dilates the pupil wide?
2) Which nerve system and muscle opens EYELIDS extra wide?
3) Explain eye movement directionality of
[Inferior Oblique m.] & the [Superior Oblique m.]
1) Sympathetic nervous system
2) Sympathetic nervous system
3) I O U O, SO DO
Inferior Oblique Up Out
Superior Oblique Down Out
List the 5 Components of [Facial CN7] and EACH of their purposes
- GVA
- SVA
- GVE [4]
- SVE [4]
- GSA
[Facial CN7] Components
- GVA= soft palate deep sensation—>[Lower NST]
- SVA=Tongue TASTE from anterior 2/3–> [upper NST]
- GSA= Pain & Temp of [Ear pinna] –>[Spinal Trigeminal Nucleus of V]
- [GVE]= motor to submand., subling, lacrimal & [nasal mucosa] glands—> [SUP salivary nucleus]
- SVE= motor to facial express muscle, POST belly digastric, stylohyoid, stapedius –> [motor nuc. of 7]
1) Petrous bone2)What parent bone is this bone found? 3) What is its clinical significance?
1) MOST DENSE cranial bone that [internal acoustic meatus] is found in2) Temporal bone3) Houses [internal acoustic meatus] where Facial CN7 transmits
The ____ ____n. gives way to the Pterygopalatine ganglion found from CN__. This in turn gives way to a n. tht travels to innervate the ____ and _____ glands
The GREATER PETROSAL n. gives way to Pterygopalatine ganglion found from CN7, which turns into a n. tht innervates the Lacrimal and Nasal mucosa glands
What occurs after the Facial CN7 exits the [internal auditory meatus] along with CN__ [3]
Once Facial CN7 exits [internal auditory meatus] (with [CN8/vestibulochoclear/auditory])1st - visceral motor fibers of Facial CN7 divides into [Grtr Petrosal n.] & [Chorda Tympani] 2nd- [Grtr Petrosal n.] innervates lacrimal, nasal & Palatine glands3rd- [Chorda Tympani] innervates submandibular & sublingual Salivary glands
1) Describe the Branchial Motor Component of the ___nerve [CN__] 2) What are the muscles of facial expression? [3]3) Which component does this belong to?
Branchial Motor Component of Facial CN7ºVoluntary MOTOR control of facial expression muscles, POST belly digastric, stylohyoid & stapedius2) Buccinator, BOTH Occipitalis, platysma 3) SVE
1) Name nerves working in branchial motor component OF Facial CN7? [7]2) Which component does this belong to?
+ [POST auricular bnch] + [n. to POST Belly Digastric & Stylohyoid]THe=Temporal bnchZombie= Zygomatic bnchBit= Buccal bnchMy= Mandibular bnchCat= Cervical bnch 2) SVE
A: What is Bell’s Palsy caused by? B: Pt that has Dry Mouth but still can cry has a lesion where at?
A: Facial CN7 irritation B: Facial Canal (somewhere between [Grtr Petrosal n.] and [Chorda Tympani n.] )
[Vestibulocochlear Auditory] nerve1. Cranial Nerve # ?2. Foramen Traveled? 3. Component 4. Function for each Component [2]5. Name the Nucleus and their location [2]
[Vestibulocochlear Auditory] n.1. CN82. internal auditory meatus [along with CN7]3. SSA [cochlear n. vs. Vestibular n.]4. A: SSA cochlear = [Organ of Corti] in cochlear ductB: SSA vestibular = semicircular canals 5. A: (2 cochlear Nuclei)—> MEDULLAB: (4 Vestibular Nuclei)—-> MEDULLA
[Glossopharyngeal] nerve
- Cranial Nerve # ?
- Foramen Traveled?
- Components and Nuclei associated
ºGVA [3]ºSVAºGVEºSVEºGSA
- Function for each Component
[Glossopharyngeal] n.
- CN9
- Jugular Foramen
- GVA[3] / SVA / GSA / GVE(hitches ride) / SVE
- ºGVA[3]=[bp via carotid sinus], [sensory soft palate], [pharynx(gag reflex)] —>{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]
“GLOAP”= Glossopharyngeal n. uses [lesser petrosal n.] to get to otic ganglion—>then uses Auriculotemporal n. to get to PAROTID SALIVARY GLAND destination
Which 3 Cranial Nerves transmit thru [Jugular Foramen]?
CN 9, 10 and 11
Which 4 Cranial Nerves are Parasympathetic ?
3, 7, 9 and 10 = Parasympathetic CN =
[VAGUS] nerve
- Cranial Nerve # ?
- Foramen Traveled?
- Components [5]
[VAGUS] n.
- CN10
- Jugular Foramen [along with 9,10,11]
- GVA / SVA / GSA / GVE / SVE
A: What are is Function 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 are the 2 Vagus CN10 [SVE] branches & what do they innervate? Which one wraps around the Aortic Arch?
VAGUS n. = CN10
ºGVA= DEEP 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] & [controls 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: 2 SVE branches:
[SUP Laryngeal]–>[External laryngeal branch]
–>Cricothyroid
[Recurrent Laryngeal]—>Intrinsic Larynx*** = RL wraps around the Aortic Arch!
