LATEST 2026
Cranial Nerve I (one) - Answers Olfactory
Sense of smell
Sensory
Test for odor identification (rule out nasal obstruction)
Cranial Nerve II (two) - Answers Optic
Sensory and visual acuity
Test for visual acuity
Test visual fields
Perform ophthalmologic exam
Cranial Nerve III (three) - Answers Oculomotor
Motor
Evaluated with IV and VI
Eye movement, pupil size, eyelid opening
Inspect eyelid for drooping
Inspect pupil size and equality
Test consensual response and accommodation
Test extra-ocular eye movement
So tested thru PERLA and six cardinal fields
Eyelid dooping/palsy is cranial nerve III
Cranial Nerve IV (four) - Answers Trochlear
Motor
Evaluated with III and VI
Eye movement, pupil size, eyelid opening
Inspect eyelid for drooping
Inspect pupil size and equality
Test consensual response and accommodation
Test extra-ocular eye movement
So tested thru PERLA and six cardinal fields
Cranial Nerve V (five) - Answers Trigeminal
Mixed (both sensory and motor)
Jaw strength, ask to clench teeth
Inspect face for atrophy or tremors
Palpate jaw for tone and strength
Test for pain and sensation
Test corneal reflex
Cranial Nerve VI (six) - Answers Abducens
Motor
Evaluated with III and IV
Eye movement, pupil size, eyelid opening
Inspect eyelid for drooping
Inspect pupil size and equality
Test consensual response and accommodation
Test extra-ocular eye movement
So tested thru PERLA and six cardinal fields
Cranial Nerve VII (seven) - Answers Facial
Mixed (both sensory and motor)
Facial expressions and taste
Inspect facial symmetry
Test tongue for salt and sweet
Assess smile, frown, puff out cheeks
Cranial Nerve VIII (eight) - Answers Acoustic
Sensory
Hearing and balance
Test hearing (whisper test)
, Compare bone and air conduction
Test for sound lateralization
Cranial Nerve IX (nine) - Answers Glossopharyngeal
Mixed (both sensory and motor)
Taste and swallowing
Test tongue for sour and bitter
Test gag reflex and swallowing
Cranial Nerve X (ten) - Answers Vagus
Mixed (both sensory and motor)
Swallowing and speech
Inspect palate and uvula for symmetry
Inspect for swallow difficulty
Evaluate guttural speech sounds
Cranial Nerve XI (eleven) - Answers Spinal accessory
Motor
Muscle strength
Test trapezius and sternocleidomastoid muscle strength
Shrug shoulders against resistance
Cranial Nerve XII (twelve) - Answers Hypoglossal
Motor
Tongue strength
Inspect tongue for tremors, symmetry, atrophy
Test tongue movements
Test tongue strength
Evaluate lingual speech sounds
Assessing cranial nerves in infants - Answers In infants, cranial nerves can be assessed by observing:
CN II, III, IV, and VI can be assessed by looking for optical blink reflex, gaze and tracking, doll's eye
CN V is evaluated with rooting and sucking reflex
CN VII look at facial expression, forehead wrinkling, smiling
CN VIII look at acoustic blink reflex, doll's eye manuever
CN IX, X evaluate swallow and gag reflex
CN XII evaluate sucking and swallowing ability, tongue position with pinch test
Types of agnosia: Visual - Answers Occipital lobe
Types of agnosia: Auditory - Answers Temporal lobe (lateral + superior)
Types of agnosia: Tactile - Answers Parietal lobe
Types of agnosia: Body parts and relationships - Answers Parietal lobe (posterio-inferior)
Types of aphasia: Auditory receptive - Answers Temporal lobe (Wernicke's area)
Types of aphasia: Expressive speaking - Answers Inferior posterior frontal area (Broca's)
Types of aphasia: Visual receptive - Answers Parietal-occiptal
Broca's aphasia - Answers Expressive type of aphasia characterized by intact reading comprehension,
impaired writing skills, and using only nouns and verbs in speech
Broca area (frontal lobe) contains the motor cortex, which is associated with speech formation, as
well as decision making, problem solving, the ability to concentrate, and short-term memory
Which part of the brain contains the Wernicke's speech area? - Answers Temporal lobe
The temporal lobe is responsible for perception and interpretation of sounds as well as localizing their
source. It contains the Wernicke speech area, which allows a person to understand spoken and
written language. It is also involved in the integration of behavior, emotion, and personality, as well as
long-term memory
Types of aphasia: Expressive writing - Answers Posterior frontal
What are characteristics of delirium? - Answers Characteristics of delirium include a sudden onset of
cognitive impairment, illogical flow of ideas, and hallucinations that fluctuates during the day and last
hours or days
What are characteristics of Parkinson's? - Answers Slumped posture and a lack of facial expression
may indicate depression or a neurologic condition such as Parkinson disease
Shuffling gait
What does the limbic system regulate? - Answers Emotions