intro to cranial nerves etc

Question 1

How many cranial nerves are there?

Answer 1

12

Question 2

what is cranial nerve I?

Answer 2

olfactory

Question 3

what is cranial nerve II?

Answer 3

optic

Question 4

what is cranial nerve III?

Answer 4

oculomotor

Question 5

what is cranial nerve IV?

Answer 5

trochlear

Question 6

what is cranial nerve V?

Answer 6

trigeminal

Question 7

what is cranial nerve VI?

Answer 7

abducens

Question 8

what is cranial nerve VII?

Answer 8

facial

Question 9

what is cranial nerve VIII?

Answer 9

vestibulocochlear

Question 10

what is cranial nerve IX?

Answer 10

glossopharyngeal

Question 11

what is cranial nerve X

Answer 11

vagus

Question 12

what is cranial nerve XI?

Answer 12

accessory

Question 13

what is cranial nerve XII?

Answer 13

hypoglossal

Question 14

what do functions (sensory, motor or both) does each cranial nerve do?

Answer 14

Mneumonic = Some Say Marry Money But My Brother Says Big Brains Matter More

I - Sensory
II - Sensory
III - Motor
IV - Motor
V - Both
VI - Motor
VII - Both
VIII - Sensory
IX - Both
X - Both
XI - Motor
XII - Motor

Question 15

T/F = generally cranial nerves do not decussate

Answer 15

True

Question 16

what does decussate mean?

Answer 16

cross-over

Question 17

fill on the blanks:
brain effects will be (x)lateral
nerve effects will be (y)lateral

Answer 17

x = contra
y = ipsi

Question 18

which 2 cranial nerves decussate

Answer 18

CN II and CN IV

Question 19

where are the cranial nerve nucleus’ located?

Answer 19

in the brainstem

Question 20

why do brain (cerebral cortex) lesions often lead to contralateral effects?

Answer 20

due to the decussation (crossing over) of motor and sensory pathways in the brainstem

Question 21

what are the general senses?

Answer 21

pain
pressure
touch
temperature
proprioception

Question 22

what are the special senses and where are they carried?

Answer 22

all carried in cranial nerves
olfaction
vision
taste
hearing
vestibular function