Cranial Nerves Part 2 Flashcards
Name the sensory ganglion of the glossopharyngeal nerve
Superior petrosal
Inferior petrosal
What type of nerve is the glossopharyngeal nerve?
Mixed
Where does the superior petrosal ganglion get input from? What type?
FROM:
Eustachian tube
Tympanic membrane
Skin behind the ear
GENERAL:
Pain, touch, temperature
Where does the inferior petrosal ganglion get input from? What type?
FROM: Posterior third of tongue Soft palate & faucial pillars Tonsils (palatine & lingual) Adenoids & pharynx
GENERAL: touch, pain temperature
SPECIAL: taste (posterior tongue)
Name the sensory nuclei of CN IX
SAME AS CN VII
spinal nucleus
Solitary nucleus
What is the role of the spinal nucleus of CN IX?
Input via superior petrosal
GSA(touch, pain, temperature/ selected ear)
What is the role of the solitary nucleus of CN IX?
Input via inferior petrosal ganglion
GVA (touch, pain, temp., tongue, oropharynx, nasopharynx)
SVA (taste posterior tongue)
How is the tongue’s sensory supplied?
Anterior:
GSA: CN V
SVA: CN VII
posterior:
GVA & SVA: CN IX
Where are the motor nuclei of CNs IX X XI?
Are all in nucleus ambiguus
What area does the glossopharyngeal nerve motor nucleus supply?
Stylopharygeus
What type of nerve is the vagus (CN X) nerve?
Mixed
Name the ganglion if the vagus nerve
Superior ganglion (jugular) Inferior ganglion (nodose)
What are the sensory nuclei of the vagus nerve?
Spinal
Solitary
What type of input does the spinal nucleus of CN X receive?
GSA from external ear
What type of input does the solitary nucleus of CN X receive?
GVA from larynx, pharynx and trachea
What type of reflect is the CN X responsible for?
Sensory component of cough response
OUTPUT cough
OUTPUT of VP gag response (input through CN IX)
What is the motor nucleus of CN X a part of?
Nucleus ambiguus (SNS)
Dorsal motor nucleus (ANS)
What are the motor branches of the Vagus nerve?
Pharyngeal nerve
Superior laryngeal nerve
Recurrent laryngeal nerve
What is included in the pharyngeal nerve?
Pharynx & soft palate
Epiglottis
What is included in the laryngeal nerve?
External branch
cricothyroid
What is included in the recurrent laryngeal nerve?
Intrinsic laryngeal EXCEPT cricothyroid(included in superior laryngeal nerve)
What is the difference between the looping of the right and left recurrent laryngeal nerves?
Right- loops under subclavian artery
Left- loops under aorta
Which surgeries are dangerous for the recurrent laryngeal nerve?
Open heart surgery
Thyroid surgery
Thymus surgery
Which reflexes are the vagus nerve responsible for?
VP gag response:
Out through CN X
cough response:
IN & OUT through CN X
What happens if there’s a lesion of the Vagus nerve?
Bilateral effects : Phonation Resonance Respiration Protective reflexes (VP gag/Cough)
