Cranial Nerves Flashcards
Name all Nerves
Olfactory, Optic, Oculomotor, Trochlear, Abducens, Trigeminal, Facial, Vestibulocochlear,Glossopharyngeal, Vague, Accessory, Hypoglossal
Which nerves are pure sensory?
I - Olfactory
II - Optic
V III -Vestibulochoclear
Which nerves are pure motor?
III - Oculomotor
IV - Trochlear
VI- Abducens
Which nerves carry parasympathetic fibers of ANS?
III - Oculomotor
VII - Facial
IX - Glossopharygeal
X - Vagus
Define Anosmia
Inability do detect smells
where would you have a lesion for anosmia?
Frontal Lesion
Which CN tests visual acuity?
II - Optic
Define Myopia
Impaired Far vision
Define presbyopia
Impaired near vision
Which CN tests pupillary reflexes?
II - Optic
III - Oculomotor
Define: Anisocoria
Unequal pupils
Which nerve dysfunction causes Horner’s Syndrome?
II or III
What nerve dysfunction causes homonymous hemianopsia?
II - Optic
Define Strabisumus
Eye deviates from normal conjugate position because it is pulled outwards (can’t look up, down or in)
Which nerve controls strabismus?
CN VI - Trochlear
Define Esotropia
Eye pulled inward
Which nerve controls facial sensation?
CN V - Trigeminal
Which nerve are you testing with Corneal Reflex?
V - Trigeminal
What CN controls muscles of mastication?
V - Trigeminal
What nerve controls motor of facial muscles?
VII - Facial
Which CN effects nystagmus?
VIII - Vestibulocochlear
What is Weber’s Test? what does it test?
Place vibrating tuning fork on head in mid position and see if heard equally. This is called LATERALIZATION.
Rinne Test - What is this testing (CN?)
Compare air and bone conduction by placing tuning fork on mastoid bone then close to ear. Shoudl be heard longer through air than bone.. (VIII)
Conductive Loss vs Sensorineural loss
Conductive - sound heard through bone is equal to or longer than air
Sensorineural loss - sound heard longer through air
