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.
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