Cranial Nerves Part 2

Question 0

Name the sensory ganglion of the glossopharyngeal nerve

Answer 0

Superior petrosal

Inferior petrosal

Question 1

What type of nerve is the glossopharyngeal nerve?

Answer 1

Mixed

Question 2

Where does the superior petrosal ganglion get input from? What type?

Answer 2

FROM:
Eustachian tube
Tympanic membrane
Skin behind the ear

GENERAL:
Pain, touch, temperature

Question 3

Where does the inferior petrosal ganglion get input from? What type?

Answer 3

FROM:
Posterior third of tongue
Soft palate & faucial pillars
Tonsils (palatine & lingual)
Adenoids & pharynx 

GENERAL: touch, pain temperature
SPECIAL: taste (posterior tongue)

Question 4

Name the sensory nuclei of CN IX

Answer 4

SAME AS CN VII

spinal nucleus
Solitary nucleus

Question 5

What is the role of the spinal nucleus of CN IX?

Answer 5

Input via superior petrosal

GSA(touch, pain, temperature/ selected ear)

Question 6

What is the role of the solitary nucleus of CN IX?

Answer 6

Input via inferior petrosal ganglion

GVA (touch, pain, temp., tongue, oropharynx, nasopharynx)
SVA (taste posterior tongue)

Question 7

How is the tongue’s sensory supplied?

Answer 7

Anterior:
GSA: CN V
SVA: CN VII

posterior:
GVA & SVA: CN IX

Question 8

Where are the motor nuclei of CNs IX X XI?

Answer 8

Are all in nucleus ambiguus

Question 9

What area does the glossopharyngeal nerve motor nucleus supply?

Answer 9

Stylopharygeus

Question 10

What type of nerve is the vagus (CN X) nerve?

Answer 10

Mixed

Question 11

Name the ganglion if the vagus nerve

Answer 11

Superior ganglion (jugular)
Inferior ganglion (nodose)

Question 12

What are the sensory nuclei of the vagus nerve?

Answer 12

Spinal

Solitary

Question 13

What type of input does the spinal nucleus of CN X receive?

Answer 13

GSA from external ear

Question 14

What type of input does the solitary nucleus of CN X receive?

Answer 14

GVA from larynx, pharynx and trachea

Question 15

What type of reflect is the CN X responsible for?

Answer 15

Sensory component of cough response

OUTPUT cough
OUTPUT of VP gag response (input through CN IX)

Question 16

What is the motor nucleus of CN X a part of?

Answer 16

Nucleus ambiguus (SNS)

Dorsal motor nucleus (ANS)

Question 17

What are the motor branches of the Vagus nerve?

Answer 17

Pharyngeal nerve
Superior laryngeal nerve
Recurrent laryngeal nerve

Question 18

What is included in the pharyngeal nerve?

Answer 18

Pharynx & soft palate

Epiglottis

Question 19

What is included in the laryngeal nerve?

Answer 19

External branch

cricothyroid

Question 20

What is included in the recurrent laryngeal nerve?

Answer 20

Intrinsic laryngeal EXCEPT cricothyroid(included in superior laryngeal nerve)

Question 21

What is the difference between the looping of the right and left recurrent laryngeal nerves?

Answer 21

Right- loops under subclavian artery

Left- loops under aorta

Question 22

Which surgeries are dangerous for the recurrent laryngeal nerve?

Answer 22

Open heart surgery
Thyroid surgery
Thymus surgery

Question 23

Which reflexes are the vagus nerve responsible for?

Answer 23

VP gag response:
Out through CN X

cough response:
IN & OUT through CN X

Question 24

What happens if there’s a lesion of the Vagus nerve?

Answer 24

Bilateral effects :
Phonation 
Resonance
Respiration 
Protective reflexes (VP gag/Cough)