CNS Cranial Nerves Witwer Slides 1-65 Flashcards
Label the CNs in this image
The brainstem consists of what three structures?
midbrain, pons, and medulla
The bulb of the corticobulbar tract contains which two structures?
Pons and medulla
The corticobulbar tract is a _____ tract that connects the motor nuclei of the _____, _____, _____ via the _____ of the internal _____.
motor
head, face and neck
genu
capsule
Choose the best answer:
The corticobulbar tracts innervate:
a) Ipsilateral and contralateral cervical nuclei
b) Ipsilateral and contralateral cranial nerve nuclei except for ipsilateral only innervation of CN VII and XII
c) Ipsilateral and contralateral cranial nerve nuclei except for contralateral only innervation of CN VII and XII
c) Ipsilateral and contralateral cranial nerve nuclei except for contralateral only innervation of CN VII and XII
A 47-year-old male patient presents with difficulty chewing, dysphagia, regurgitation, chokinng, slurred speech, weakness of the soft palate and an absent gag reflex. You suspect:
a) Pseudobulbar palsy of CN IX, XI and XII
b) Bulbar palsy of CN IX, X, VII, XII
c) Pseudobulbar palsy of CN IX, X, XI, VII
d) Bulbar palsy of CN IX, X, XI, XII
d) Bulbar palsy of CN IX, X, XI, XII
You grab a deliciously fresh buffalo wing hot out of the fryer and immediately drop it. This sensory input of pain and temperature are relayed to:
a) Ipsilateral cerebellar cortex
b) Ipsilateral and contralateral cerebral cortices
c) Contralateral cerebral cortex
d) Contralateral cerebellar cortex
c) Contralateral cerebral cortex
T/F:
Pressure and touch are projected bilaterally to the ipsilateral and contralateral cerebral cortices.
True: This makes sense due to the increased neural requirement to determine varying levels of pressure and touch sensation
CN III innervates the constrictor of pupil and ciliary body via the following pathway:
a) Edinger-Westphal nucleus (EWN) in pons > pterygopalatine ganglion
b) Lacrimal nucleus of pons > pterygopalatine ganglion
c) EWN in midbrain > ciliary ganglion
d) Dorsal motor nucleus of CN X in medulla > Ciliary ganglion
c) EWN in midbrain > ciliary ganglion
Which two brainstem nuclei follow CN VII?
a) EWN and inferior salivatory nucleus
b) Superior and inferior salivatory nuclei
c) EWN and lacrimal nucleus
d) Lacrimal and superior salivatory nuclei
d) Lacrimal and superior salivatory nuclei
The lacrimal and nasal glands are innervated by fibers leaving which ganglion?
a) Pterygopalatine
b) ciliary
c) Submandibular
d) otic
a) pterygopalatine
The submandibular and sublingual glands are innervated by fibers leaving which ganglion?
a) Ciliary
b) Pterygopalatine
c) glottomandibular
d) submandibular
d) submandibular
The parotid gland is innervated via the _____ _____ nucleus and _____ ganglion.
a) Inferior salivatory, otic
b) Superior salivatory, otic
c) Inferior salivatory, submandibular
d) Superior salivatory, submandibular
a) Inferior salivatory, otic
PSNS fibers of CN X innervate the following:
a) heart, bladder, erectile tissue
b) Heart, bronchial tree, small and large intestine
c) Heart, bronchial tree, stomach, small and large intestine
d) Heart, bronchial tree, small/large intestine, stomach, bladder
c) Heart, bronchial tree, stomach, small and large intestine
The large intestine receives dual PSNS innervation from which two sources?
a) CN IX and XI
b) CN XI and pelvic splanchnic
c) CN X and pelvic splanchnic
d) CN X and trunk ganglion
c) CN X and pelvic splanchnic
Mydriasis would be caused by the ____ ____ muscle which is innvervated by the SNS fibers following V1 to the long ____ nerve.
a) Pupil sphincter, ciliary
b) Pupil terminator, ciliary
c) Pupil dilator, optic
d) Pupil dilator, ciliary
d) Pupil dilator, ciliary
Which muscle aids the levator palpebrae?
a) Beuller muscle
b) Kueller muscle
c) Miller muscle
d) Mueller muscle
d) Mueller muscle
The olfactory nerve enters the skull via this “sieve” bone.
a) Cribriform plate of Sphenoid
b) Sella turcica
c) superior orbital fissure
d) Cribriform plate of ethmoid
d) Cribriform plate of ethmoid
A lesion near the calcarine fissure would cause issues with what?
a) Vision
b) Smell
c) Memory
d) gustation
a) vision
This fissure separates the occipital visual cortices. Witwer loves to throw some rando term he had on a slide once that relates to an area more commonly known. Calcar means “spur,” and a spur in your eye would affect vision. Or remember as Calcareye fissure
Which nerve is the affarent limb of the pupillary light reflex AND accomodation?
a) Olfactory
b) Oculomotor
c) lingual nerve
d) Optic
d) Optic
A lesion at 1, 3, and 7 would result in what termed deficits?
1 = Ipsilateral blindess
3 = Bilateral hemianopia
7 = R hemianopia w/ macular sparing
Another term for a neuroectodermal retinal tumor is?
Retinoblastoma
What is the propensity that a retinoblastoma will be bilateral?
40%
Intrinsic muscles of the eye are innervated by which CN?
CN III
Extrinsic muscles of the eye are innervated by which CNs?
CN III, IV, VI