12-8: Cranial Nerves - by name Flashcards
Olfactory - number and type
I; sensory
Olfactory - function
smell
Olfactory - damage
anosmia
Optic - number and type
II; sensory
Optic - function
vision
Optic - damage
blindness, anopsias
Oculomotor - number and type
III; motor
Oculomotor - function
movement of the eyeball and eyelid, focus lens, constrict pupil
Oculomotor - damage
diplopia (double vision), ptosis (dropping eyelids), external strabismus (eye moves laterally)
Trochlear - number and type
IV; motor
Trochlear - function
movement of eye inferolaterally
Trochlear - damage
diplopia
Trigeminal - number and type
V; mixed; largest cranial nerve
Trigeminal - function
sensory: touch, pain, and temperature from face
motor: controls muscles of chewing (MOM)
Trigeminal - damage
paralysis of chewing muscles; trigeminal neuralgia
Abducens - number and type
VI; motor
Abducens - function
abducts eye
Abducens - damage
internal strabismus (cross eyed)
Facial - number and type
VII; mixed
Facial - function
sensory: taste from anterior 2/3rds of tongue
motor function: muscles of facial expression
autonomic: tears and saliva
Facial - damage
Bells Palsy (paralysis of facial muscles on affected side, partial loss of taste)
Vestibulocochlear - number and type
VIII; sensory
Vestibulocochlear - function
sense of hearing and sense of equilibrium
Vestibulocochlear - damage
verigo, nystagmus (rapid, involuntary eye movements), nerve deafness
Glossopharyngeal - number and type
IX; mixed
Glossopharyngeal - function
sensory: taste, touch, and pain from throat and back of tongue
motor: swallowing and saliva production
Vagus - number and type
X; mixed; only cranial nerve to extend beyond head and neck
Vagus - functions
sensory: sensations from internal organs
motor: contraction of smooth muscle and secretions of digestive glands
Vagus - damage
loss of voice, dysphagia, impaired digestion; destruction of both = death
Accessory - number and type
XI; motor
Accessory - function
move head and neck
Accessory - damage
can’t shrug shoulders or turn head (head turns towards injured side)
Hypoglossal - number and type
XIII; motor
Hypoglossal - function
tongue movements involved in swallowing and speech
Hypoglossal - damage
difficulty with speech and swallowing