cranial nerve anatomy

Question 1

where does trigeminal nerve connect to CNS

Answer 1

pons

Question 2

what bone in skull does trigeminnal nerve course

Answer 2

sphenoid bone

Question 3

facial nerve connection to CNS

Answer 3

pontomedullary junction

Question 4

what skull bone does facial nerve course

Answer 4

temporal bone

• inferior acoustic meatus
• stylomastoid foramen

Question 5

what is branch of facial nerve called

Answer 5

chorda tympani

Question 6

what does chorda tympani supply

Answer 6

sensation of taste for 2/3rd tongue

Question 7

what does facial nerve connect with

Answer 7

lingual nerve (branch of CN V3)

Question 8

muscles of facial expression are innervated by

Answer 8

CN VII

Question 9

where does glossopharyngeal connect to CNS

Answer 9

superior medulla oblongata

Question 10

where does glossopharyngeal meet skull bones

Answer 10

junction between temporal bone and occipital bone

Question 11

what part of tongue does glossopharyngeal supply

Answer 11

anterior 1/3rd tongue

Question 12

what supplies the palatine tonsils

Answer 12

glossopharyngeal

Question 13

where does vagus nerve connect to CNS

Answer 13

= lateral medulla

- oblongata

Question 14

testing facial muscles - CN VII

Answer 14

ask patient to frown, smile, close eyes

Question 15

testing vagus nerve

Answer 15

• patient to say ‘ah’
• ask patient to swallow
• listen to their speech (hoarseness)
• ask patient to cough

Question 16

function of spinal accessory nerve

Answer 16

• turning of head (sternoclamastoid)

- shrugging of shoulders

Question 17

function of hypoglossal

Answer 17

protrusion of tongue

- if pathology it will point towards side of injured nerve e.g. if tongue goes right its a right sided pathology

Question 18

How many branches does the facial nerve have

Answer 18

5

Question 19

name the 5 branches of the facial nerve

Answer 19

• cervical branch
• marginal mandibular branch
• buccal branch
• zygomatic branch
• temporal branch

Question 20

what nerve innervates the muscles of mastication

Answer 20

mandibular nerve of CNV (V3 branch)

Question 21

what nerve can blow out fractures damage

Answer 21

branches of maxillary nerve CN V2

Question 22

what muscle does glossopharyngeal innervate

Answer 22

stylopharyngeus

Question 23

what part of tongue does glossopharyngeal sensory innervation from

Answer 23

posterior third of tongue

Question 24

where does glossopharyngeal exit the skull

Answer 24

via jugular foramen

Question 25

what nerve innervates the diaphragm

Answer 25

phrenic nerve (C3,4,5)