cranial nerves

Question 1

how many pairs of cranial nerves are there?

Answer 1

12

Question 2

what are the twp cranial nerves that don’t stay inside the skull?

Answer 2

vagus nerve and accessory nerve

Question 3

True or Flase. As they originate directly from the brain, all cranial nerves are considered to be part of the central nervous system.

Answer 3

False

Question 4

what cranial nerves conduct parasympathetic fibers?

Answer 4

III Oculomotor nerve
VII Facial nerve
IX Glossopharyngeal nerve
X Vagus nerve

Question 5

What cranial nerves serve sensory functions?

Answer 5

I Olfactory
II Optic
VIII Vestibularcochlear

Question 6

What cranial nerves serve BOTH motor and sensory functions?

Answer 6

V Trigeminal
VII Facial
IX Glossopharyngeal
X Vagus

Question 7

What cranial nerves serve motor functions?

Answer 7

III Oculomotor
IV Trochlear
VI Abducens
XI Accessory
XII Hypogloseal

Question 8

what is the only nerve that does not enter the brainstem?

Answer 8

I Olfactory nerve - its axons enter the olfactory bulbs

Question 9

In the dog, approximately what percentage of fibers decussate at the optic chiasm before forming the optic tracts on the lateral aspects of the diencephalon?

Answer 9

75%

Question 10

lateral strabismus, ptosis of the superior eyelid, and mydrias are all clinical signs of dysfunction of what nerve?

Answer 10

oculomotor nerve

Question 11

extorsion of the eye is a sign of clinical dysfunction of what nerve?

Answer 11

trochlear

Question 12

medial strabismus is a clinical sign of dysfunction of what nerve?

Answer 12

Abducens

Question 13

What nerve is the sole innervater the trapezius muscle?

Answer 13

accessory nerve