Cranial Nerves Flashcards
Cranial Nerve I
Olfactory
Sensory function
Have the pt. ID recognizable scents under the pt’s nose
Anosmia
The inability to perceive odors
Cranial Nerve II
Optic
Sensory function
Use Snellen and Rosenbaum charts and visual fields testing
Look for overhead eyeball protrustion
Cranial Nerve III
Oculomotor
Motor Function
Controls up, down, and medial eye movement and pupillary constriction
Cranial Nerve IV
Trochlear
Motor function
Controls down and medial eye movement
Cranial Nerve VI
Abducens
Motor function
Lateral eye movement
Cranial Nerve III, IV, and VI Tests
Corneal light reflex
Cover/uncover test
6 fields of gaze
PERRLA
Cranial Nerve V
Trigeminal
Motor and sensory function
Cranial Nerve V motor function
Muscles of mastication (chewing)
Palpate masseter and temporal muscles for strength of contraction while clenching teeth
Cranial Nerve V Sensory branches and function
Opthalmic, Maxiallary, Mandibular
Controls facial sensation to light touch, dull, sharp, and temperature
Corneal light reflex (touch cornea with wisp of cotton tip)
Cranial Nerve VII
Facial Motor and sensory function Inspect face for symmetry Sensory - controls anterior 2/3 of tongue Motor - controls facial muscles
Cranial Nerve VIII
Sensory
Controls hearing and balance
Vestibular Branch - controls equilibrium and balance
Cochlear - Controls ability to hear; do whisper test
Cranial Nerve IX
Glossopharyngeal
Swallowing/gag reflex, tongue movement, taste of 1/3 portion of the tongue
Cranial Nerve X
Sensation of pharynx, larynx, swallowing, vocal cord movement
Innervates carotids and aortic bodies
Cranial Nerve XI
Spinal Accessory
Controls head movement and should shrugs
Also larynx/pharynx function
