Cranial Nerves Flashcards
CN is responsible for 5 special senses:
taste
vision
hearing
smell
balance
CN I:
S or M:
Function:
Test:
Olfactory N.
Sensory
Smell
place scent under nostril - test each nostril separately
CN II:
S or M:
Function:
Test:
Optic N.
Sensory
Vision
Snellen chart/light reflex
CN III:
S or M:
Function:
Test:
Oculomotor N.
Motor
Constricts pupil
H-test/light reflex
CN IV:
S or M:
Function:
Test:
Trochlear N.
Motor
Eyes movement
H-Test
CN V:
S or M:
Function:
Test:
Trigeminal N. (V1, V2, V3)
Sensory & Motor
Mastication of the face muscle
Feel the face for sensory components
CN VI:
S or M:
Function:
Test:
Abducens N.
Motor
Lateral eyes movement
H-Test
CN VII:
S or M:
Function:
Test:
Facial N.
Sensory & Motor
Taste of tongue/muscles of face
Smile
CN VIII:
S or M:
Function:
Test:
Vestibulochoclear N.
Sensory
Head position, sound, equilibrium
Fingertip rub
CN IX:
S or M:
Function:
Test:
Glossopharyngeal N.
Sensory & Motor
touch & taste of tongue (pos. 2/3)
Gag reflex/post. tongue taste
CN X:
S or M:
Function:
Test:
Vagus N.
Sensory & Motor
Throat & visceral mm.
Phonation “ahh”/ gag reflex
CN XI:
S or M:
Function:
Test:
Accessory N.
Motor only
SCM and Trap
resisted shoulder shrug
CN XII:
S or M:
Function:
Test:
Hypoglossal N.
Motor
ipsilateral tongue m.
Stick out tongue
what is the cause of Bell’s palsy?
injury to CN VII producing paralysis of some or all facial muscles on the affected side
CN VII is vulnerable to compression when ________
a viral infection produces inflammation