Cranial Nerves

Question 1

CN1

Answer 1

sensory, olfaction, directly to the cortex, temporal lobe, primary olfaction area, olfaction association area. These areas are anterior to the auditory centers and superior to the gustatory centers

Question 2

Only have SENSORY function

Answer 2

1, 2, 8

Question 3

Primarily motor

Answer 3

3,4,6 (eyeball movement) 10,11,12

Question 4

Truly mixed sensory and motor

Answer 4

5, 7, 9

Question 5

CN2

Answer 5

sensory, OPTIC NERVE, goes to thalamus to synapse with an interneuron that will go to the primary vision center and vision association center in the posterior region of the brain, the occipital lobe

Question 6

CN3

Answer 6

primarily motor, movement of the eyelid and eyeball, accomodation of the lens, constriction of pupil

Also, proprioception fromt he eye muscles

Question 7

CN4

Answer 7

Trochlear, primarily motor, movement of eyeball and proprioception of eyeball muscles

Question 8

CN5

Answer 8

Trigeminal, truly mixed,
Motor - chewing
Sensory - General Somatic Afferent from nose, forehead, scalp, teeth, jaw, cheek, etc
The trigeminal nerve is the largest cranial nerve, having three branches. These will synapse with a neuron in the thalamus that will take it on to the somatosensory area in the parietal lobe.

Question 9

CN6

Answer 9

ABDUCENS, primarily motor, movement of eyeball, proprioception of eyeball muscle

Question 10

CN7

Answer 10

Facial nerve, truly mixed, motor is facial experessions and secretion of saliva and tears

sensory is taste and proprioception from muscles of face and scalp

Question 11

Do cranial nerves have both somatic and autonomic function?

Answer 11

yes

Question 12

In what way is the cranial nerves’ autonomic function limited?

Answer 12

limited to only parasympathetic function

Question 13

CN8

Answer 13

VESTIBULOCOCHLEAR - only sensory; equilibrium and hearing to thalamus and then on to the temporal lobe

AKA auditory

Question 14

CN9

Answer 14

GLOSSOPHARYNGEAL:
motor: controls muscles of pharynx and larynx and saliva secretion
Sensory: taste, ventilation, blood pressure, proprioception

Question 15

CN10

Answer 15

VAGUS nerves are primarily motor. Via PARASYMPATHETIC pathways, they are the effector for:

DECREASING heart rate
SMOOTH muscle contraction and relaxation of airway, esophagus, stomach, small intestine
SECRETION of digestive juices
BARORECEPTOR and CHEMORECEPTOR for visceral organs

Question 16

CN11

Answer 16

ACCESSORY (XI) nerves are primarily motor. THey are the effector for swallowing and moving the head. Also proprioception

Question 17

CN12

Answer 17

HYPOGLOSSAL (XII) is primarily motor. It is the effector for moving the tongue. Also proprioception from the tongue muscles

Question 18

What muscle are the effector muscles of CN11?

Answer 18

moving the head - sternocleidomastoid and trapezius

Question 19

What are parasympathetic motor controlled events of the cranial nerves?

Answer 19

CN3 - OCULOMOTOR - constriction/relaxation of the iris
CN7 - FACIAL - secretion of tears and saliva
CN9 - GLOSSOPHARYNGEAL - secretion of saliva
CN 10 - VAGUS - decrease HR, secretion of digestive juices, smooth muscle activation

Question 20

Diencephalon cranial nerves

Answer 20

2 pairs, I and II

Question 21

Brain stem

Answer 21

all other 10

Question 22

CN0

Answer 22

vomernasal, detects pheromones

Question 23

Which cranial nerve picks up the baroreceptor and chemoreceptor?

Answer 23

Vagus nerve

Question 24

What kind of neuron is in a sensory cranial nerve?

Answer 24

bipolar neuron

Question 25

What nerve controls eye movement?

Answer 25

CN 3, 4, 6

III, IV, VI

Question 26

What CN controls chewing?

Answer 26

trigeminal (V, 5)

Question 27

What CN controls facial expressions?

Answer 27

Facial (PSNS tears and saliva) VII or 7

Question 28

What CN controls movements of the tongue?

Answer 28

hypoglossal (XII) 12, functions in speech and swallowing

Question 29

What CN controls moving the head?

Answer 29

Accessory XI, 11, sternocleidomastoid and trapezius

Question 30

What CN controls movements of the eyelid?

Answer 30

CN III, ocululomotor

Question 31

Which three CN control swallowing?

Answer 31

glossopharyngeal (9, IX)
Accessory (XI, 11)
Hypoglossal (XII, 12)

Question 32

Which CN function in sensory of taste?

Answer 32

Facial (VII) and Glossopharyngeal (IX)

Question 33

Which CN functions in touch?

Answer 33

CN V, Trigeminal