Cranial nerves Flashcards
Cranial nerve 1
olfactory
What is the origin of cranial nerve 1?
What is the function?
origin: cerebrum
Function: sensory olfaction
cranial nerve 2
optic
what is cranial nerve 2 origin?
What is the function?
origin: diencephalon
function: sensory vision
cranial nerve 3
oculomotor
what is cranial nerve 3 origin?
What is the function? (2)
origin: brain stem
functions:
- motor –> 4 eye muscles; eyelid
- Autonomic parasympathetic: contricts pupil, near focus
what is cranial nerve 4 origin?
What is the function?
origin: brainstem
function: motor –> superior oblique
located in corners of eyes closer to nose
cranial nerve 4
trochlear
cranial nerve 5
trigeminal
what is cranial nerve 5 origin?
What is the function? (2)
origin: brain stem
function:
- somatic sensory
- motor: mastication
*thickest nerve; located on cheeks
cranial nerve 6
Abducent
what is cranial nerve 6 origin?
What is the function?
origin: brain stem
Function: motor –> lateral rectus
located in corners of eyes closer to ears
cranial nerve 7
Facial
what is cranial nerve 7 origin?
What is the function? (3)
origin: brainstem
Functions:
- motor –> facial expression
- Sensory –> 2/3 of anterior tongues taste
- Autonomic parasympathetic –> 2 salivary glands, lacrimal glands
cranial nerve 8
vestibulocochlear
what is cranial nerve 8 origin?
What is the function?
Origin: Brain stem
Function: Sensory –> Hearing; orientation in space
located in the ears
cranial nerve 9
glossopharyngeal
what is cranial nerve 9 origin?
What is the function? (2)
origin: brainstem
function:
- sensory –> posterior 13 of tongue; pharynx - taste
- autonomic parasympathetic: parotid salivary gland
cranial nerve 10
vagus
what is cranial nerve 10 origin?
What is the function? (3)
origin: brainstem
function:
- sensory: laryngopharynx, larynx, t/a organs
- motor: larngopharynx, tongue
- autonomic parasympathetic: thoracic and abdominal organs
cranial nerve 11
accessory
what is cranial nerve 11 origin?
What is the function?
origin: brainstem
function: motor –> trapezius, sternocleidomastoid
cranial nerve 12
hypoglossal
what is cranial nerve 12 origin?
What is the function?
origin: brainstem
function: motor –> tongue; pharynx
what cranial nerve is linked to lack of smell sensations?
olfactory (I)
what cranial nerve is linked to absent pupil reflex?
oculomotor (III)
what cranial nerve is linked to blindness?
optic (II)
what cranial nerve is linked to dropped eyelid (lazy eye)?
oculomotor (III)
what cranial nerve is linked to dropped face (Bell palsy)?
facial (VII)
what cranial nerve is linked to toothache?
trigeminal (V)
what cranial nerve is linked to deafness and/or disorientation?
vestibulocochlear (VIII)
what cranial nerve is linked to loss of taste sensation?
facial (VII)
what cranial nerve is linked to dysphagia (difficulty swallowing)?
hypoglossal (XII)/ vagus (X)
what cranial nerve is linked to unable to follow the direction of movement when doctor examine your eyes?
oculomotor (III)/trochlear (IV)/ abducent (VI)
what cranial nerve is linked to paralysis GI tract?
vagus (X)
