NURS 251 Exam 2 Review Questions
And All Correct Answers.
CN 1 - Answer Olfactory
CN2 - Answer Optic
CN3 - Answer Oculomotor
CN4 - Answer Trochlear
CN5 - Answer Trigeminal
CN6 - Answer Abducens
CN7 - Answer Facial
CN8 - Answer Acoustic
CN9 - Answer Glossopharyngeal
CN10 - Answer Vagus
CN11 - Answer Spinal Accessory
CN12 - Answer Hypoglossal
Name the 3 sensory CNs
,OOA - Answer -Olfactory
-Optic
-Acoustic
Name the 5 motor CNs
OTASH - Answer -Oculomotor
-Trochlear
-Abducens
-Spinal Accessory
-Hypoglossal
Name the 4 mixed CNs
TFGV - Answer -Trigeminal
-Facial
-Glossopharyngeal
-Vagus
Which CNs come off of the midbrain? - Answer -olfactory
-oculomotor
-optic
-trochlear
Which CNs come off of the pons - Answer -trigeminal
-abducens
-facial
-acoustic
Which CNs come off of the medulla - Answer -glossopharyngeal
-vagus
,-spinal accessory
-hypoglossal
Name the CNs that can be clumped together to check - Answer -3,4,6 (oculomotor, trochlear,
abducens)
-5,7 (Trigeminal, facial)
-9,10,12 (glossopharyngeal, vagus, hypoglossal)
How would you test the olfactory CN 1 - Answer Give pt a sample of something to smell (something
common) and ask them what they believe it is.
This nerve smells impulses from nasal mucous membrane and sends the sense to the brain - Answer
olfactory
this cranial nerve sends visual impulses from eye to brain - Answer optic
What tests can you use to test CN2, optic - Answer -visual acuity (Snellen)
-Visual Fields (check optic discs)
Explain the Snellen test and what does it test for - Answer - the snellen test checks teh optic nerve
- you must have teh pt stand back 20 ft away and ask them to read the lowest line they can and see how
far they cam read it to.
What does it mean when a pt has a 20/40 vision - Answer he can see at 20ft what people can see at
40ft
this cranial nerve controls eye muscle contraction, eye movement, constricts pupils, and elevates eyelids
- Answer the oculomotor nerve
How can you test oculomotor, trochlear, and abducens and explain the test
6EEP - Answer -the six cardinal fields of gaze
, -Extraocular eye movement (can the eye get there)
-Eye muscle movement (lazy eye)
-Pupillary response
What is a lazy eye and when is it checked - Answer its checked when checking for CNs 3,4,6
-it occurs when the muscles surrounding the eyes are too strong, you can be born with it or it can be
because of stress on the eyes from reading and such.
Explain when checking CN 3,4,6 what pupillary responses you're checkign for - Answer -consensual
responses
-accomodation
what happens when checkign CN3,4,6, for pupillary accomodation - Answer close items will constrict
the pupils
items at a distance will dilate the pupils
What happens when checking CN 3,4,6 for pupillary consensual reaction - Answer you shine light in the
left pupil to constrict it and then the automatic response is for the right pupil to constrict as well.
When checking the CN 3,4,6 how are you supposed to describe your pt's results - Answer PERLA
What is PERLA - Answer A way to size up the pupils and look at a shape
it stands for
Pupils equal round react to light accomodation.
this cranial nerve controls contracts eye muscle and eye movement - Answer trochlear
this cranial nerve controls lateral eye movement - Answer abducens
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