Cranial nerves Flashcards
Cranial nerve types:
1) sensory only
2) mostly motor
3) mixed
Why can’t a cranial nerve be all motor output?
Some sensory input is required for feedback to tell that action has been completed
Proprioceptor
Sensory neuron that receives stimulus from within body to indicate position
Motor nerves contain these neurons
Cranial nerve I
Olfactory
Olfactory function
Sensory
Sense of smell
Cranial nerve II
Optic
Optic function
Sensory
Vision
Cranial nerve III
Oculomotor
Oculomotor function
Mainly motor
Movement of upper eyelid and eyeball
Regulates size of pupil
Cranial nerve IV
Trochlear
Trochlear function
Mainly motor
Movement of eyeball
Cranial Nerve V
Trigeminal
Trigeminal function
Mixed
Sensory: carries sensations of head and face
Motor: chewing
Cranial nerve VI
Abducens
Abducens function
Mainly motor
Movement of eyeball
Cranial nerve VII
Facial
Facial function
Mixed
Sensory:taste
Motor: facial expressions, tears, and saliva
Cranial nerve VIII
Vestibulocochlear
Vestibulocochlear function
Sensory
Balance, equilibrium, and hearing
Cranial nerve IX
Glossopharyngeal
Glossopharyngeal function
Mixed
Sensory: taste, breathing, blood pressure
Motor: swallowing
Cranial nerve X
Vagus
Vagus function
Mixed
Slowing heart rate, voice production, sensations from throat and ear
CN XI
Accessory
Accessory function
Mainly motor
Move neck and head
Skeletal muscles of throat
Cranial nerve XII
Hypoglossal
Hypoglossal function
Mainly motor
Movement of tongue when swallowing and talking
Name the cranial nerves in order
Olfactory Optic Oculomotor Trochlear Trigeminal Abducens Facial Vestibulocochlear Glossophraryngeal Vagus Accessory Hypoglossal
