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Cranial nerves
Cranial nerves, their functions and clinical features
23
Anatomy
Graduate
04/06/2011

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Cards

Term
CN I - Olfactory

Type?
Definition
Sensory
Term
CN I - Olfactory

Function?
Definition
Smell
Term
CN I - Olfactory

lesions result in?
Definition
Anosmia
Term
CN II - Optic

type?
Definition
sensory
Term
CN II - Optic

function?
Definition
Sight
Term
CN II - Optic

Lesions result in?
Definition
Visual field deficits (anopsia)
Loss of light relfex
Term
CN VIII - Vestibulocochlear/auditory

type?
Definition
sensory
Term
CN VIII - Vestibulocochlear/auditory

Function?
Definition
Hearing and balance
Term
CN VIII - Vestibulocochlear/auditory

Lesions?
Definition
hearing loss
loss of balance
nystagmus (involuntary eye movements)
Term
CN III - Oculomotor

type?
Definition
motor
Term
CN III - Oculomotor

FUNCTION?
Definition
pupil constriction
Term
CN III - Oculomotor

FUNCTION?
Definition
upper eyelid elevation
Term
CN III - Oculomotor

FUNCTION?
Definition
adduction (medial rectus)
and
accommodation (ciliary muscle)
Term
CN III - Oculomotor

Lesions?
Definition
Diplopia (double vision)
Term
CN III - Oculomotor

Lesions?
Definition
Continuously dilated pupil
Term
CN III - Oculomotor

Lesions?
Definition
Loss of near response (failure to accomodate)
Term
CN III - Oculomotor

Lesions?
Definition
Ptosis (drooping of upper eyelid)
Term
CN IV - Trochlear

Lesions?
Definition
diplopia (double vision) while looking down with eye adducted ->
difficulty reading and going down stairs
Term
CN IV - Trochlear

Type?
Definition
Motor
Term
CN IV - Trochlear

Function?
Definition
depresses and abducts eyeball
Term
CN VI - Abducens

Type?
Definition
motor
Term
CN VI - Abducens

FUnction?
Definition
abducts eyeball
Term
CN VI - Abducens

Lesion?
Definition
Internal strabismus (uneven eyes "lazy eyes")
loss of parallel gaze
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