Cranial Nerves Flashcards
Olfactory; smell
CN I
How to test CN I
Symmetrical recognition of smells
Optic; vision
CN II
How to test CN II
Snellen and Rosenbaum charts
CN III
Oculomotor
MOTOR: opening of eyelids, EOM movement
PARASYMPATHETIC: pupil constriction lens shape
How to test CN 3, 4, and 6
Six cardinal positions of gaze/diagnostic positions test and PERRLA
CN IV
Trochlear nerve
MOTOR: down and inward eye movement
CN 5
Sensory and motor?
Trigeminal
SENSORY: sensation of face, scalp, cornea, and mucous membranes of mouth and nose
MOTOR: muscles of mastication
How to test for CN 5
Light touch to three areas (TRIgeminal)
Forehead, cheeks, and chin
Motor = clench teeth
CN 6
Abducens
MOTOR: lateral movement of eye
CN 7
Facial
SENSORY: taste
MOTOR: Face muscles
PARASYMPATHETIC: saliva and tear secretion 
How to test for CN 7
Smile, frown, close eyes tightly, lift eyebrows, show teeth, puff cheeks
CN 8
Acoustic
SENSORY: hearing and equilibrium
How to test for CN 8
Whispered voice test
CN 9
Glossopharyngeal nerve
SENSORY: taste, gag reflex
MOTOR: pharynx; phonation and swallowing
PARASYMPATHETIC: parotid and carotid glands
How to test CN 9 and 10
Press tongue with blade and say “aah”
CN 10
Vagus
SENSORY: sensation of carotid body, sinus, pharynx and viscera
MOTOR: Larynx; talking. Pharynx; swallowing
PARASYMPATHETIC: carotid reflex
CN 11
Spinal accessory
MOTOR: trapezes and sternomastoid muscle movement
How to test CN 11
Rotate head and shrug shoulders against resistance
CN 12
Hypoglossal
MOTOR: Tongue movement
How to test CN 12
Move tongue in all directions; “light, tight, dynamite”
